{"id":114,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/envelope-spectrum\/"},"modified":"2026-05-23T22:36:25","modified_gmt":"2026-05-23T22:36:25","slug":"envelope-spectrum","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/gu\/glossary\/envelope-spectrum\/","title":{"rendered":"What is an Envelope Spectrum? Demodulated Signal Analysis"},"content":{"rendered":"<h1>Understanding the Envelope Spectrum<\/h1>\n\t\t<section class=\"woocommerce hestia-shop products is-shortcode\" id=\"products\" data-sorder=\"hestia_shop\" >\n\t\t\t\t\t\t<div class=\"\">\n\t\t\t\t\t\t<div class=\"hestia-shop-content\">\n\t\t\t<div class=\"row\" data-aos=\"fade-up\" >\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/gu\/product\/balanset-1\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/gu\/product\/balanset-1\/\" title=\"\u0aaa\u0acb\u0ab0\u0acd\u0a9f\u0ac7\u0aac\u0ab2 \u0aac\u0ac7\u0ab2\u0ac7\u0aa8\u0acd\u0ab8\u0ab0 \u0a85\u0aa8\u0ac7 \u0a95\u0a82\u0aaa\u0aa8 \u0ab5\u0abf\u0ab6\u0acd\u0ab2\u0ac7\u0ab7\u0a95 \u0aac\u0ac7\u0ab2\u0ac7\u0aa8\u0acd\u0ab8\u0ac7\u0a9f-1A\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Balanset-1A full kit portable balancer and vibration analyzer\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-272x182.webp 272w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/gu\/product-category\/devices\/\" rel=\"tag\">\u0a89\u0aaa\u0a95\u0ab0\u0aa3\u0acb<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/gu\/product\/balanset-1\/\" title=\"\u0aaa\u0acb\u0ab0\u0acd\u0a9f\u0ac7\u0aac\u0ab2 \u0aac\u0ac7\u0ab2\u0ac7\u0aa8\u0acd\u0ab8\u0ab0 \u0a85\u0aa8\u0ac7 \u0a95\u0a82\u0aaa\u0aa8 \u0ab5\u0abf\u0ab6\u0acd\u0ab2\u0ac7\u0ab7\u0a95 \u0aac\u0ac7\u0ab2\u0ac7\u0aa8\u0acd\u0ab8\u0ac7\u0a9f-1A\">\u0aaa\u0acb\u0ab0\u0acd\u0a9f\u0ac7\u0aac\u0ab2 \u0aac\u0ac7\u0ab2\u0ac7\u0aa8\u0acd\u0ab8\u0ab0 \u0a85\u0aa8\u0ac7 \u0a95\u0a82\u0aaa\u0aa8 \u0ab5\u0abf\u0ab6\u0acd\u0ab2\u0ac7\u0ab7\u0a95 \u0aac\u0ac7\u0ab2\u0ac7\u0aa8\u0acd\u0ab8\u0ac7\u0a9f-1A<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>1,975.00<\/span> + VAT (if applicable)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/gu\/wp-json\/wp\/v2\/glossary\/114?add-to-cart=986\" data-quantity=\"1\" data-product_id=\"986\" data-product_sku=\"BS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0ab8\u0abe\u0aae\u0ac7\u0ab2 \u0a95\u0ab0\u0acb\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0ab8\u0abe\u0aae\u0ac7\u0ab2 \u0a95\u0ab0\u0acb\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/gu\/wp-json\/wp\/v2\/glossary\/114?add-to-cart=986\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_986\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"986\" data-product_sku=\"BS-1\" aria-label=\"\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0a89\u0aae\u0ac7\u0ab0\u0acb: \u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d \u0aa4\u0aae\u0abe\u0ab0\u0abe \u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0a89\u0aae\u0ac7\u0ab0\u0ab5\u0abe\u0aae\u0abe\u0a82 \u0a86\u0ab5\u0acd\u0aaf\u0ac1\u0a82 \u0a9b\u0ac7\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0ab8\u0abe\u0aae\u0ac7\u0ab2 \u0a95\u0ab0\u0acb<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_986\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/gu\/product\/vibration-sensor\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/gu\/product\/vibration-sensor\/\" title=\"\u0ab5\u0abe\u0a87\u0aac\u0acd\u0ab0\u0ac7\u0ab6\u0aa8 \u0ab8\u0ac7\u0aa8\u0acd\u0ab8\u0ab0\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Balanset-1A vibration sensor close-up\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3.webp 1280w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/gu\/product-category\/parts\/\" rel=\"tag\">\u0aad\u0abe\u0a97\u0acb<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/gu\/product\/vibration-sensor\/\" title=\"\u0ab5\u0abe\u0a87\u0aac\u0acd\u0ab0\u0ac7\u0ab6\u0aa8 \u0ab8\u0ac7\u0aa8\u0acd\u0ab8\u0ab0\">\u0ab5\u0abe\u0a87\u0aac\u0acd\u0ab0\u0ac7\u0ab6\u0aa8 \u0ab8\u0ac7\u0aa8\u0acd\u0ab8\u0ab0<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>90.00<\/span> + VAT (if applicable)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/gu\/wp-json\/wp\/v2\/glossary\/114?add-to-cart=1820\" data-quantity=\"1\" data-product_id=\"1820\" data-product_sku=\"VS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0ab8\u0abe\u0aae\u0ac7\u0ab2 \u0a95\u0ab0\u0acb\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0ab8\u0abe\u0aae\u0ac7\u0ab2 \u0a95\u0ab0\u0acb\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/gu\/wp-json\/wp\/v2\/glossary\/114?add-to-cart=1820\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1820\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1820\" data-product_sku=\"VS-1\" aria-label=\"\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0a89\u0aae\u0ac7\u0ab0\u0acb: \u201cVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201cVibration sensor\u201d \u0aa4\u0aae\u0abe\u0ab0\u0abe \u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0a89\u0aae\u0ac7\u0ab0\u0ab5\u0abe\u0aae\u0abe\u0a82 \u0a86\u0ab5\u0acd\u0aaf\u0ac1\u0a82 \u0a9b\u0ac7\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0ab8\u0abe\u0aae\u0ac7\u0ab2 \u0a95\u0ab0\u0acb<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1820\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/gu\/product\/optical-sensor-for-balanset-and-arbalance\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/gu\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"\u0a93\u0aaa\u0acd\u0a9f\u0abf\u0a95\u0ab2 \u0ab8\u0ac7\u0aa8\u0acd\u0ab8\u0ab0 (\u0ab2\u0ac7\u0ab8\u0ab0 \u0a9f\u0ac7\u0a95\u0acb\u0aae\u0ac0\u0a9f\u0ab0)\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"\u0a93\u0aaa\u0acd\u0a9f\u0abf\u0a95\u0ab2 \u0ab8\u0ac7\u0aa8\u0acd\u0ab8\u0ab0 (\u0ab2\u0ac7\u0ab8\u0ab0 \u0a9f\u0ac7\u0a95\u0acb\u0aae\u0ac0\u0a9f\u0ab0)\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-1536x1023.webp 1536w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU.webp 1600w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/gu\/product-category\/parts\/\" rel=\"tag\">\u0aad\u0abe\u0a97\u0acb<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/gu\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"\u0a93\u0aaa\u0acd\u0a9f\u0abf\u0a95\u0ab2 \u0ab8\u0ac7\u0aa8\u0acd\u0ab8\u0ab0 (\u0ab2\u0ac7\u0ab8\u0ab0 \u0a9f\u0ac7\u0a95\u0acb\u0aae\u0ac0\u0a9f\u0ab0)\">\u0a93\u0aaa\u0acd\u0a9f\u0abf\u0a95\u0ab2 \u0ab8\u0ac7\u0aa8\u0acd\u0ab8\u0ab0 (\u0ab2\u0ac7\u0ab8\u0ab0 \u0a9f\u0ac7\u0a95\u0acb\u0aae\u0ac0\u0a9f\u0ab0)<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>124.00<\/span> + VAT (if applicable)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/gu\/wp-json\/wp\/v2\/glossary\/114?add-to-cart=1832\" data-quantity=\"1\" data-product_id=\"1832\" data-product_sku=\"Tach-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0ab8\u0abe\u0aae\u0ac7\u0ab2 \u0a95\u0ab0\u0acb\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0ab8\u0abe\u0aae\u0ac7\u0ab2 \u0a95\u0ab0\u0acb\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/gu\/wp-json\/wp\/v2\/glossary\/114?add-to-cart=1832\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1832\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1832\" data-product_sku=\"Tach-1\" aria-label=\"\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0a89\u0aae\u0ac7\u0ab0\u0acb: \u201cOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cOptical Sensor (Laser Tachometer)\u201d \u0aa4\u0aae\u0abe\u0ab0\u0abe \u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0a89\u0aae\u0ac7\u0ab0\u0ab5\u0abe\u0aae\u0abe\u0a82 \u0a86\u0ab5\u0acd\u0aaf\u0ac1\u0a82 \u0a9b\u0ac7\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0ab8\u0abe\u0aae\u0ac7\u0ab2 \u0a95\u0ab0\u0acb<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1832\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/gu\/product\/balanset-4\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/gu\/product\/balanset-4\/\" title=\"\u0aac\u0abe\u0ab2\u0aa8\u0acd\u0ab8\u0ac7\u0a9f-4\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Vibromera rotor balancing kit: carry case, multi-channel signal conditioner, handheld analyzer, magnetic base, vibration sensors, and coiled cables.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4.webp 640w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/gu\/product-category\/devices\/\" rel=\"tag\">\u0a89\u0aaa\u0a95\u0ab0\u0aa3\u0acb<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/gu\/product\/balanset-4\/\" title=\"\u0aac\u0abe\u0ab2\u0aa8\u0acd\u0ab8\u0ac7\u0a9f-4\">\u0aac\u0abe\u0ab2\u0aa8\u0acd\u0ab8\u0ac7\u0a9f-4<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>6,803.00<\/span> + VAT (if applicable)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/gu\/wp-json\/wp\/v2\/glossary\/114?add-to-cart=1833\" data-quantity=\"1\" data-product_id=\"1833\" data-product_sku=\"BS-4\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0ab8\u0abe\u0aae\u0ac7\u0ab2 \u0a95\u0ab0\u0acb\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0ab8\u0abe\u0aae\u0ac7\u0ab2 \u0a95\u0ab0\u0acb\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/gu\/wp-json\/wp\/v2\/glossary\/114?add-to-cart=1833\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1833\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1833\" data-product_sku=\"BS-4\" aria-label=\"\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0a89\u0aae\u0ac7\u0ab0\u0acb: \u201cBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201cBalanset-4\u201d \u0aa4\u0aae\u0abe\u0ab0\u0abe \u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0a89\u0aae\u0ac7\u0ab0\u0ab5\u0abe\u0aae\u0abe\u0a82 \u0a86\u0ab5\u0acd\u0aaf\u0ac1\u0a82 \u0a9b\u0ac7\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0ab8\u0abe\u0aae\u0ac7\u0ab2 \u0a95\u0ab0\u0acb<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1833\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div><!-- \/.row --><div class=\"row\">\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/gu\/product\/magnet-stand\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/gu\/product\/magnet-stand\/\" title=\"\u0aae\u0ac7\u0a97\u0acd\u0aa8\u0ac7\u0a9f\u0abf\u0a95 \u0ab8\u0acd\u0a9f\u0ac7\u0aa8\u0acd\u0aa1 \u0a87\u0aa8\u0acd\u0ab8\u0abe\u0a87\u0a9d-60-kgf\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"\u0a9a\u0ac1\u0a82\u0aac\u0a95 \u0a86\u0aa7\u0abe\u0ab0.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36.webp 1280w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/gu\/product-category\/parts\/\" rel=\"tag\">\u0aad\u0abe\u0a97\u0acb<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/gu\/product\/magnet-stand\/\" title=\"\u0aae\u0ac7\u0a97\u0acd\u0aa8\u0ac7\u0a9f\u0abf\u0a95 \u0ab8\u0acd\u0a9f\u0ac7\u0aa8\u0acd\u0aa1 \u0a87\u0aa8\u0acd\u0ab8\u0abe\u0a87\u0a9d-60-kgf\">\u0aae\u0ac7\u0a97\u0acd\u0aa8\u0ac7\u0a9f\u0abf\u0a95 \u0ab8\u0acd\u0a9f\u0ac7\u0aa8\u0acd\u0aa1 \u0a87\u0aa8\u0acd\u0ab8\u0abe\u0a87\u0a9d-60-kgf<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>46.00<\/span> + VAT (if applicable)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/gu\/wp-json\/wp\/v2\/glossary\/114?add-to-cart=1852\" data-quantity=\"1\" data-product_id=\"1852\" data-product_sku=\"MS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0ab8\u0abe\u0aae\u0ac7\u0ab2 \u0a95\u0ab0\u0acb\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0ab8\u0abe\u0aae\u0ac7\u0ab2 \u0a95\u0ab0\u0acb\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/gu\/wp-json\/wp\/v2\/glossary\/114?add-to-cart=1852\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1852\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1852\" data-product_sku=\"MS-1\" aria-label=\"\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0a89\u0aae\u0ac7\u0ab0\u0acb: \u201cMagnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"\u201cMagnetic Stand Insize-60-kgf\u201d \u0aa4\u0aae\u0abe\u0ab0\u0abe \u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0a89\u0aae\u0ac7\u0ab0\u0ab5\u0abe\u0aae\u0abe\u0a82 \u0a86\u0ab5\u0acd\u0aaf\u0ac1\u0a82 \u0a9b\u0ac7\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0ab8\u0abe\u0aae\u0ac7\u0ab2 \u0a95\u0ab0\u0acb<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1852\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/gu\/product\/reflective-tape\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/gu\/product\/reflective-tape\/\" title=\"\u0aaa\u0acd\u0ab0\u0aa4\u0abf\u0aac\u0abf\u0a82\u0aac\u0ac0\u0aa4 \u0a9f\u0ac7\u0aaa\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"\u0aaa\u0acd\u0ab0\u0aa4\u0abf\u0aac\u0abf\u0a82\u0aac\u0ac0\u0aa4 \u0a9f\u0ac7\u0aaa\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-16x12.webp 16w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-272x182.webp 272w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/gu\/product-category\/parts\/\" rel=\"tag\">\u0aad\u0abe\u0a97\u0acb<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/gu\/product\/reflective-tape\/\" title=\"\u0aaa\u0acd\u0ab0\u0aa4\u0abf\u0aac\u0abf\u0a82\u0aac\u0ac0\u0aa4 \u0a9f\u0ac7\u0aaa\">\u0aaa\u0acd\u0ab0\u0aa4\u0abf\u0aac\u0abf\u0a82\u0aac\u0ac0\u0aa4 \u0a9f\u0ac7\u0aaa<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>10.00<\/span> + VAT (if applicable)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/gu\/wp-json\/wp\/v2\/glossary\/114?add-to-cart=2329\" data-quantity=\"1\" data-product_id=\"2329\" data-product_sku=\"rt-1\" class=\"button 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data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/gu\/wp-json\/wp\/v2\/glossary\/114?add-to-cart=4193\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_4193\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"4193\" data-product_sku=\"BS-1OEM\" aria-label=\"\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0a89\u0aae\u0ac7\u0ab0\u0acb: \u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d \u0aa4\u0aae\u0abe\u0ab0\u0abe \u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0a89\u0aae\u0ac7\u0ab0\u0ab5\u0abe\u0aae\u0abe\u0a82 \u0a86\u0ab5\u0acd\u0aaf\u0ac1\u0a82 \u0a9b\u0ac7\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">\u0a95\u0abe\u0ab0\u0acd\u0a9f\u0aae\u0abe\u0a82 \u0ab8\u0abe\u0aae\u0ac7\u0ab2 \u0a95\u0ab0\u0acb<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_4193\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/section>\n\t\t\n<p>\u0a86 <strong>envelope spectrum<\/strong> is the frequency <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/spectrum\/\">spectrum<\/a> obtained by computing the <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/fft\/\">FFT<\/a> of the envelope \u2014 the amplitude-demodulated signal \u2014 produced during <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/envelope-analysis\/\">envelope analysis<\/a>. It reveals the <em>repetition rate<\/em> of impacts and modulations buried in high-frequency <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/vibration\/\">vibration<\/a>, which makes it the single most powerful technique for detecting <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/bearing-defects\/\">rolling-element bearing defects<\/a>. Where a standard velocity spectrum shows the carrier frequencies \u2014 the structural resonances that impacts ring \u2014 the envelope spectrum shows the rate at which those impacts occur, mapping directly onto the <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/bearing-fault-frequencies\/\">bearing fault frequencies<\/a> BPFO, BPFI, BSF and FTF.<\/p>\n<p>Put simply, the envelope spectrum is to bearing diagnostics what the ordinary spectrum is to <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/unbalance\/\">unbalance<\/a> and <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/misalignment\/\">misalignment<\/a>: the primary tool that makes early fault detection possible. It pulls clean diagnostic frequencies out of the high-frequency &#8220;hash&#8221; that a velocity spectrum cannot resolve.<\/p>\n<h2>1. How the Envelope Spectrum Is Generated<\/h2>\n<p>A localised flaw \u2014 a spall on a race, a pit on a roller \u2014 strikes a hard contact once per pass and excites the bearing&#8217;s natural resonances at several kHz. Those resonances are the <em>carrier<\/em>; the regular train of impacts <em>modulates<\/em> the carrier&#8217;s amplitude. The envelope process strips away the carrier and keeps the modulation:<\/p>\n<ol>\n<li><strong>Band-pass filter:<\/strong> isolate a high-frequency band rich in resonance energy (commonly 1\u201310 kHz), discarding the low-frequency vibration from unbalance and misalignment. A <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/band-pass-filter\/\">band-pass filter<\/a> does this job.<\/li>\n<li><strong>Envelope detection (<a href=\"https:\/\/vibromera.eu\/gu\/glossary\/demodulation\/\">demodulation<\/a>):<\/strong> rectify the filtered signal and trace the outline of its amplitude \u2014 the envelope.<\/li>\n<li><strong>Low-pass filter:<\/strong> smooth the envelope to remove any residual carrier ripple.<\/li>\n<li><strong>FFT:<\/strong> transform the envelope into the frequency domain.<\/li>\n<li><strong>Result:<\/strong> an envelope spectrum whose peaks sit at the impact repetition rates.<\/li>\n<\/ol>\n<p>The key idea is that the modulation frequencies recovered by this chain <em>are<\/em> the bearing fault frequencies. The high-frequency carrier merely acts as a messenger, ringing each time a defect is struck.<\/p>\n<h2>2. Reading an Envelope Spectrum<\/h2>\n<h3>Healthy bearing<\/h3>\n<ul>\n<li>Low overall envelope level.<\/li>\n<li>A flat or gently sloping trace with no distinct peaks.<\/li>\n<li>A noise floor at or below the instrument&#8217;s sensitivity.<\/li>\n<\/ul>\n<h3>Defective bearing<\/h3>\n<ul>\n<li><strong>Primary peak:<\/strong> at a bearing fault frequency \u2014 <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/bpfo\/\">BPFO<\/a>, <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/bpfi\/\">BPFI<\/a>, <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/bsf\/\">BSF<\/a> \u0a85\u0aa5\u0ab5\u0abe <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/ftf\/\">FTF<\/a>.<\/li>\n<li><strong>Harmonics:<\/strong> 2\u00d7, 3\u00d7, 4\u00d7 of the fault frequency appear and grow as the defect worsens.<\/li>\n<li><strong><a href=\"https:\/\/vibromera.eu\/gu\/glossary\/sidebands\/\">Sidebands<\/a>:<\/strong> spaced at cage (FTF) or <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/running-speed\/\">running-speed<\/a> (1\u00d7) intervals around the fault peak, reflecting load modulation as the defect orbits in and out of the load zone.<\/li>\n<li><strong>Elevated floor:<\/strong> the overall noise floor rises as surface deterioration spreads.<\/li>\n<\/ul>\n<p>The matching peak tells you <em>which<\/em> element has failed: a peak at BPFO points to the outer race, BPFI to the inner race, BSF to a rolling element, and FTF to the cage. Because BPFI and BSF rotate through the load zone, they are amplitude-modulated and therefore flanked by sidebands; a BPFO defect in the stationary load zone usually is not.<\/p>\n<h2>3. Why It Outperforms the Standard Spectrum<\/h2>\n<p>Three properties make the envelope spectrum indispensable for bearing work:<\/p>\n<ul>\n<li><strong>Early detection:<\/strong> it routinely flags incipient damage many months \u2014 often 6 to 18 \u2014 before a fault becomes visible in the velocity spectrum, giving maximum lead time for parts and planning. It is sensitive to micro-spalls that produce almost no energy on a velocity scale.<\/li>\n<li><strong>Clear fault signatures:<\/strong> because unbalance and misalignment are filtered out before demodulation, fault frequencies and their sidebands stand proud against a clean background, far easier to read than a crowded broadband spectrum.<\/li>\n<li><strong>Low-energy event capture:<\/strong> a tiny impact carries negligible energy at low frequency but excites high-frequency resonances efficiently. Envelope processing amplifies exactly these weak, high-frequency diagnostic signals.<\/li>\n<\/ul>\n<p>This is why envelope analysis sits alongside the <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/shock-pulse-method\/\">shock pulse method<\/a> and <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/spike-energy\/\">spike energy<\/a> as a cornerstone of bearing condition monitoring, and why <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/kurtosis\/\">kurtosis<\/a> often rises in step with the envelope level.<\/p>\n<h2>4. A Step-by-Step Interpretation Workflow<\/h2>\n<p>To turn an envelope plot into a diagnosis:<\/p>\n<ol>\n<li><strong>Calculate the fault frequencies<\/strong> for the installed bearing \u2014 BPFO, BPFI, BSF and FTF \u2014 from its geometry and the shaft speed. Our <a href=\"https:\/\/vibromera.eu\/gu\/calculators\/bearing-defect-frequencies\/\">Bearing Defect Frequency Calculator<\/a> returns all four in seconds, and the <a href=\"https:\/\/vibromera.eu\/gu\/calculators\/harmonic-frequency-calculator\/\">Harmonic Frequency Calculator<\/a> helps map the orders.<\/li>\n<li><strong>Search the spectrum<\/strong> for peaks at those frequencies, allowing roughly \u00b15% for slip and calculation tolerance.<\/li>\n<li><strong>Confirm with harmonics<\/strong> \u2014 a genuine bearing fault shows a series, not a lone spike.<\/li>\n<li><strong>Check sideband spacing<\/strong> for additional confirmation of the source.<\/li>\n<li><strong>Diagnose and grade<\/strong> the defect from the matched element and amplitude.<\/li>\n<\/ol>\n<p>A rough severity scale, expressed in g of envelope acceleration, helps prioritise action: an <strong>incipient<\/strong> defect (\u22480.5\u20131 g) shows a small lone peak \u2014 monitor monthly; an <strong>early<\/strong> defect (\u22481\u20133 g) shows a clear peak with one or two harmonics \u2014 monitor weekly and plan replacement within months; a <strong>moderate<\/strong> defect (\u22483\u201310 g) shows a strong peak, multiple harmonics and sidebands \u2014 plan replacement within weeks; and an <strong>advanced<\/strong> defect (>10 g) shows very high amplitude, many harmonics and an elevated floor \u2014 replace urgently. Exact thresholds depend on bearing size and speed, so always interpret them against a machine-specific <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/baseline\/\">baseline<\/a> and your own <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/trending\/\">trending<\/a> history.<\/p>\n<h2>5. Putting the Envelope Spectrum to Work in the Field<\/h2>\n<p>In a <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/condition-monitoring\/\">condition-monitoring<\/a> programme, the envelope spectrum belongs on every bearing route: trend the envelope amplitude at each fault frequency and you gain warning far earlier \u2014 and far more specifically \u2014 than overall vibration trending alone can offer. In troubleshooting it earns its keep when the overall level is high but the standard spectrum is ambiguous, when a bearing problem is suspected, when you must confirm that a replacement is genuinely warranted, or when you need to identify <em>which<\/em> bearing in a multi-bearing train is failing. A portable two-channel instrument such as the <a href=\"https:\/\/vibromera.eu\/gu\/%e0%aa%89%e0%aa%a4%e0%ab%8d%e0%aa%aa%e0%aa%be%e0%aa%a6%e0%aa%a8\/balanset-1\/\">\u0aac\u0ac7\u0ab2\u0abe\u0aa8\u0acd\u0ab8\u0ac7\u0a9f-1 \u0a8f<\/a> lets a technician capture the high-frequency vibration directly at each housing with an <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/accelerometer\/\">accelerometer<\/a>, so the same field visit that checks <a href=\"https:\/\/vibromera.eu\/gu\/glossary\/residual-unbalance\/\">residual unbalance<\/a> after a balance job can also screen the bearings for incipient damage.<\/p>\n<h2>6. Envelope Spectrum vs Envelope Analysis<\/h2>\n<p>The two terms are often used interchangeably, but it is worth keeping the hierarchy straight. <strong>Envelope analysis<\/strong> is the complete process \u2014 band-pass filtering, demodulation and FFT. The <strong>envelope signal<\/strong> is the time-domain demodulated waveform, an intermediate product. The <strong>envelope spectrum<\/strong> is the final frequency plot, the deliverable an analyst actually interprets. In short, the envelope spectrum is the output of envelope analysis, and it is the gold standard for bearing defect detection: its ability to expose fault frequencies long before they surface in a standard spectrum, paired with clear, element-specific signatures, makes it an indispensable part of any predictive-maintenance toolkit for rotating equipment.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/gu\/glossary\/\">\u2190 Back to Main Index<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Learn about envelope spectrum, FFT of the envelope signal from demodulation, revealing bearing fault frequencies by extracting impact repetition rates from high-frequency resonances.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[114,109],"tags":[],"class_list":["post-114","glossary","type-glossary","status-publish","hentry","category-analysis","category-glossary"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/gu\/wp-json\/wp\/v2\/glossary\/114","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/gu\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/gu\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/gu\/wp-json\/wp\/v2\/glossary\/114\/revisions"}],"predecessor-version":[{"id":101282,"href":"https:\/\/vibromera.eu\/gu\/wp-json\/wp\/v2\/glossary\/114\/revisions\/101282"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/gu\/wp-json\/wp\/v2\/media?parent=114"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/gu\/wp-json\/wp\/v2\/categories?post=114"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/gu\/wp-json\/wp\/v2\/tags?post=114"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}