{"id":100231,"date":"2026-02-15T20:28:34","date_gmt":"2026-02-15T20:28:34","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100231"},"modified":"2026-07-02T19:37:50","modified_gmt":"2026-07-02T19:37:50","slug":"sound-level-converter","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/kk\/calculators\/sound-level-converter\/","title":{"rendered":"\u0414\u044b\u0431\u044b\u0441 \u0434\u0435\u04a3\u0433\u0435\u0439\u0456\u043d \u0442\u04af\u0440\u043b\u0435\u043d\u0434\u0456\u0440\u0433\u0456\u0448 | \u0434\u0411 \u2194 \u041f\u0430 | SPL \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440\u044b | \u0422\u0435\u0433\u0456\u043d \u049b\u04b1\u0440\u0430\u043b"},"content":{"rendered":"\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Sound Level Converter\",\"description\":\"Convert between unweighted sound pressure level (dB SPL) and sound pressure (Pa).\",\"url\":\"https:\/\/vibromera.eu\/calculators\/sound-level-converter\/\",\"applicationCategory\":\"Engineering Calculator\",\"operatingSystem\":\"Any\",\"offers\":{\"@type\":\"Offer\",\"price\":\"0\",\"priceCurrency\":\"EUR\"},\"creator\":{\"@type\":\"Organization\",\"name\":\"Vibromera\",\"url\":\"https:\/\/vibromera.eu\/\"},\"datePublished\":\"2024-01-01\",\"dateModified\":\"2025-02-14\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true}<\/script>\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"How do I convert dB to Pascals?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"p = p_ref \u00d7 10^(SPL\/20), where p_ref = 20 \u03bcPa (= 2\u00d710\u207b\u2075 Pa), the threshold of hearing.\"}},\n{\"@type\":\"Question\",\"name\":\"What is the reference pressure for dB SPL?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The reference sound pressure is 20 \u03bcPa (micropascals) or 2\u00d710\u207b\u2075 Pa, corresponding to the approximate threshold of human hearing at 1 kHz.\"}},\n{\"@type\":\"Question\",\"name\":\"What is A-weighting?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A-weighting adjusts measured sound levels to approximate human hearing sensitivity. It reduces low (<500 Hz) and very high (>6 kHz) frequencies. dBA is the A-weighted unit. Because the correction is frequency-dependent, a single dB(A) value cannot be converted to sound pressure in Pa without knowing the frequency spectrum \u2014 this converter works with unweighted dB SPL only.\"}},\n{\"@type\":\"Question\",\"name\":\"How loud is 0 dB?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"0 dB SPL corresponds to a pressure of 20 \u03bcPa \u2014 the approximate threshold of human hearing. It is not silence, but the quietest sound most people can detect.\"}},\n{\"@type\":\"Question\",\"name\":\"What is the pain threshold in dB?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The pain threshold is approximately 130\u2013140 dB SPL, corresponding to about 63\u2013200 Pa of sound pressure.\"}}\n]}<\/script>\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vibromera.eu\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Calculators\",\"item\":\"https:\/\/vibromera.eu\/calculators\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Sound Level Converter\",\"item\":\"https:\/\/vibromera.eu\/calculators\/sound-level-converter\/\"}]}<\/script>\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&#038;family=JetBrains+Mono:wght@400;500;600&#038;family=Fraunces:opsz,wght@9..144,700;9..144,800&#038;display=swap\" rel=\"stylesheet\">\n\n<link rel=\"stylesheet\" href=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.css\">\n\n<style>\n:root{--vc-bg:#f4f1ec;--vc-surface:#fff;--vc-surface-alt:#f8f6f2;--vc-ink:#1a1a1a;--vc-ink-secondary:#5a5650;--vc-ink-muted:#8a857e;--vc-accent:#c85a2a;--vc-accent-hover:#b04d22;--vc-accent-light:#fdf0ea;--vc-blue:#2a5c8c;--vc-blue-light:#eaf1f8;--vc-green:#2a7a4b;--vc-green-light:#eaf8ef;--vc-yellow:#a67c00;--vc-yellow-light:#fef9e8;--vc-border:#d9d4cc;--vc-border-light:#e8e4dd;--vc-shadow:0 1px 3px rgba(26,26,26,.06),0 4px 12px rgba(26,26,26,.04);--vc-radius:8px;--vc-radius-lg:12px;--vc-font:'DM Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--vc-mono:'JetBrains Mono','Consolas','Monaco',monospace;--vc-display:'Fraunces',Georgia,serif}.vc-calculator{font-family:var(--vc-font);font-size:15px;line-height:1.65;color:var(--vc-ink);max-width:960px;margin:0 auto;padding:20px 16px 40px;-webkit-font-smoothing:antialiased}.vc-calculator *,.vc-calculator *::before,.vc-calculator *::after{box-sizing:border-box}.vc-header{text-align:center;padding:48px 24px 40px;position:relative}.vc-header::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:80px;height:3px;background:var(--vc-accent);border-radius:2px}.vc-header-eyebrow{font-family:var(--vc-mono);font-size:11px;font-weight:500;letter-spacing:.15em;text-transform:uppercase;color:var(--vc-accent);margin:0 0 12px}.vc-header-title{font-family:var(--vc-display);font-size:clamp(24px,4vw,36px);font-weight:800;line-height:1.15;color:var(--vc-ink);margin:0 0 16px;letter-spacing:-.02em}.vc-header-subtitle{font-size:15px;color:var(--vc-ink-secondary);margin:0 auto 20px;max-width:600px}.vc-badges{display:inline-flex;gap:8px;flex-wrap:wrap;justify-content:center}.vc-badge{font-family:var(--vc-mono);font-size:11px;font-weight:500;padding:4px 10px;border-radius:4px;background:var(--vc-surface);border:1px solid var(--vc-border);color:var(--vc-ink-secondary)}.vc-card{background:var(--vc-surface);border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);box-shadow:var(--vc-shadow);overflow:hidden;margin-top:32px}.vc-form{padding:24px}.vc-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}@media(max-width:600px){.vc-form-grid{grid-template-columns:1fr}}.vc-field{display:flex;flex-direction:column}.vc-label{font-size:12px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--vc-ink-secondary);margin-bottom:6px}.vc-label-hint{font-weight:400;text-transform:none;letter-spacing:0;color:var(--vc-ink-muted);font-size:11px}.vc-select,.vc-input{width:100%;padding:10px 12px;border:1.5px solid var(--vc-border);border-radius:6px;font-family:var(--vc-font);font-size:14px;color:var(--vc-ink);background:var(--vc-surface);transition:border-color .15s,box-shadow .15s}.vc-select{padding-right:36px;appearance:none;cursor:pointer;background-image:url(\"data:image\/svg+xml,%3Csvg xmlns='http:\/\/www.w3.org\/2000\/svg' width='16' height='16' fill='none' stroke='%235a5650' stroke-width='2'%3E%3Cpath d='M4 6l4 4 4-4'\/%3E%3C\/svg%3E\");background-repeat:no-repeat;background-position:right 10px center}.vc-select:focus,.vc-input:focus{outline:none;border-color:var(--vc-accent);box-shadow:0 0 0 3px rgba(200,90,42,.12)}.vc-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;padding-top:18px;border-top:1px solid var(--vc-border-light)}.vc-presets-label{font-family:var(--vc-mono);font-size:11px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--vc-ink-muted);width:100%;margin-bottom:2px}.vc-preset-btn{padding:5px 12px;font-family:var(--vc-font);font-size:12px;font-weight:500;border:1px solid var(--vc-border);border-radius:6px;background:var(--vc-surface-alt);color:var(--vc-ink-secondary);cursor:pointer;transition:all .15s}.vc-preset-btn:hover{border-color:var(--vc-accent);color:var(--vc-accent);background:var(--vc-accent-light)}.vc-results{border-top:1px solid var(--vc-border-light);background:var(--vc-surface-alt);padding:0;max-height:0;overflow:hidden;transition:max-height .5s cubic-bezier(.4,0,.2,1),padding .3s}.vc-results.vc-visible{max-height:2000px;padding:24px}.vc-results-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.vc-results-title{font-family:var(--vc-display);font-size:20px;font-weight:700;color:var(--vc-ink);margin:0}.vc-copy-btn{display:inline-flex;align-items:center;gap:5px;padding:6px 12px;border:1px solid var(--vc-border);border-radius:6px;background:var(--vc-surface);font-family:var(--vc-font);font-size:12px;font-weight:500;color:var(--vc-ink-secondary);cursor:pointer;transition:all .15s}.vc-copy-btn:hover{border-color:var(--vc-accent);color:var(--vc-accent)}.vc-result-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:20px}@media(max-width:500px){.vc-result-grid{grid-template-columns:1fr}}.vc-rcard{background:var(--vc-surface);border:1px solid var(--vc-border-light);border-radius:var(--vc-radius);padding:16px;transition:transform .2s}.vc-rcard:hover{transform:translateY(-1px)}.vc-rcard-primary{border-color:var(--vc-accent);border-width:2px;background:linear-gradient(135deg,#fdf6f2,var(--vc-surface));grid-column:1\/-1}.vc-rcard-label{font-family:var(--vc-mono);font-size:10px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--vc-ink-muted);margin-bottom:4px}.vc-rcard-value{font-family:var(--vc-mono);font-size:22px;font-weight:600;color:var(--vc-ink);line-height:1.2}.vc-rcard-primary .vc-rcard-value{font-size:30px;color:var(--vc-accent)}.vc-rcard-unit{font-size:14px;font-weight:400;color:var(--vc-ink-secondary)}.vc-section{margin-top:24px;border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);background:var(--vc-surface);box-shadow:var(--vc-shadow);overflow:hidden}.vc-section-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;padding:18px 24px;border:none;background:transparent;cursor:pointer;font-family:var(--vc-font);text-align:left;transition:background .15s}.vc-section-toggle:hover{background:var(--vc-surface-alt)}.vc-section-toggle-text{display:flex;align-items:center;gap:10px}.vc-section-icon{font-size:20px;line-height:1}.vc-section-title{font-family:var(--vc-display);font-size:18px;font-weight:700;color:var(--vc-ink);margin:0}.vc-section-chevron{width:20px;height:20px;color:var(--vc-ink-muted);transition:transform .3s;flex-shrink:0}.vc-section.vc-open .vc-section-chevron{transform:rotate(180deg)}.vc-section-body{max-height:0;overflow:hidden;transition:max-height .4s cubic-bezier(.4,0,.2,1)}.vc-section.vc-open .vc-section-body{max-height:20000px}.vc-section-inner{padding:0 24px 24px;border-top:1px solid var(--vc-border-light)}.vc-theory h3{font-family:var(--vc-display);font-size:17px;font-weight:700;color:var(--vc-ink);margin:28px 0 10px}.vc-theory h3:first-child{margin-top:20px}.vc-theory p{font-size:14px;color:var(--vc-ink-secondary);margin:0 0 10px}.vc-formula-box{background:var(--vc-surface-alt);border:2px solid var(--vc-border);border-radius:6px;padding:14px 20px;text-align:center;margin:14px 0;overflow-x:auto}.vc-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:13px}.vc-table th,.vc-table td{padding:10px 12px;border:1px solid var(--vc-border-light);text-align:left}.vc-table th{background:var(--vc-surface-alt);font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--vc-ink-secondary)}.vc-table tr:nth-child(even){background:var(--vc-surface-alt)}.vc-faq-list{display:flex;flex-direction:column;gap:8px;margin-top:20px}.vc-faq-item{border:1px solid var(--vc-border-light);border-radius:6px;overflow:hidden}.vc-faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;border:none;background:var(--vc-surface-alt);cursor:pointer;font-family:var(--vc-font);font-size:15px;font-weight:600;color:var(--vc-ink);text-align:left;transition:background .15s}.vc-faq-q:hover{background:#ede9e3}.vc-faq-chevron{width:16px;height:16px;color:var(--vc-ink-muted);flex-shrink:0;transition:transform .25s}.vc-faq-item.vc-open .vc-faq-chevron{transform:rotate(180deg)}.vc-faq-a{max-height:0;overflow:hidden;transition:max-height .35s}.vc-faq-item.vc-open .vc-faq-a{max-height:1200px}.vc-faq-a-inner{padding:14px 16px;border-top:1px solid var(--vc-border-light);font-size:14px;color:var(--vc-ink-secondary)}.vc-faq-a-inner p{margin:0 0 8px}.vc-faq-a-inner p:last-child{margin-bottom:0}.vc-related{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.vc-related-link{display:inline-block;padding:8px 16px;font-family:var(--vc-font);font-size:13px;font-weight:600;background:var(--vc-surface-alt);color:var(--vc-ink-secondary);border:1px solid var(--vc-border);border-radius:var(--vc-radius);text-decoration:none;transition:all .15s}.vc-related-link:hover{border-color:var(--vc-accent);color:var(--vc-accent);background:var(--vc-accent-light)}.vc-promo{margin-top:24px;padding:20px;background:linear-gradient(135deg,var(--vc-accent-light),var(--vc-surface));border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);display:flex;align-items:center;gap:16px}.vc-promo-text{flex:1;font-size:14px;color:var(--vc-ink-secondary)}.vc-promo-text strong{color:var(--vc-ink)}.vc-promo-link{padding:8px 20px;font-size:13px;font-weight:700;color:#fff;background:var(--vc-accent);border-radius:var(--vc-radius);text-decoration:none;white-space:nowrap;transition:background .15s}.vc-promo-link:hover{background:var(--vc-accent-hover)}.vc-footer{text-align:center;padding:32px 16px;font-size:13px;color:var(--vc-ink-muted)}.vc-footer a{color:var(--vc-accent);text-decoration:none}.vc-footer a:hover{text-decoration:underline}.vc-footer-links{margin-top:8px;font-size:12px}.vc-footer-links a{margin:0 8px}@media print{.vc-section-body{max-height:none!important}.vc-faq-a{max-height:none!important}.vc-results{max-height:none!important;padding:24px!important}.vc-copy-btn,.vc-section-chevron,.vc-faq-chevron,.vc-presets,.vc-promo{display:none!important}}\n<\/style>\n\n<div class=\"vc-calculator\">\n<header class=\"vc-header\">\n    <p class=\"vc-header-eyebrow\">Free Engineering Tool #216<\/p>\n    <h1 class=\"vc-header-title\">Sound Level Converter<\/h1>\n    <p class=\"vc-header-subtitle\">Convert between unweighted sound pressure level (dB SPL) and sound pressure (Pa). Enter a value in either unit and get an instant conversion. Note: A-weighted levels in dB(A) are not directly convertible to Pa.<\/p>\n    <div class=\"vc-badges\"><span class=\"vc-badge\">SPL = 20\u00b7log\u2081\u2080(p\/p\u2080)<\/span><span class=\"vc-badge\">dB SPL \u2194 Pa<\/span><span class=\"vc-badge\">Unweighted<\/span><\/div>\n<\/header>\n<div class=\"vc-card\">\n    <form class=\"vc-form\" id=\"vc-form\" autocomplete=\"off\">\n        <div class=\"vc-form-grid\">\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-mode\">Convert From<\/label>\n                <select class=\"vc-select\" id=\"vc-mode\"><option value=\"db\">dB SPL \u2192 Pa<\/option><option value=\"pa\">Pa \u2192 dB SPL<\/option><\/select><\/div>\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-val\">Value <span class=\"vc-label-hint\" id=\"vc-val-hint\">(dB)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-val\" step=\"any\" placeholder=\"e.g. 94\" value=\"94\"><\/div>\n        <\/div>\n        <div class=\"vc-presets\">\n            <div class=\"vc-presets-label\">Quick presets<\/div>\n            <button type=\"button\" class=\"vc-preset-btn\" data-m=\"db\" data-v=\"0\">0 dB (threshold)<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-m=\"db\" data-v=\"60\">60 dB (conversation)<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-m=\"db\" data-v=\"94\">94 dB (1 Pa)<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-m=\"db\" data-v=\"120\">120 dB (pain threshold)<\/button>\n        <\/div>\n    <\/form>\n    <div class=\"vc-results\" id=\"vc-results\">\n        <div class=\"vc-results-head\"><h2 class=\"vc-results-title\">Results<\/h2><button type=\"button\" class=\"vc-copy-btn\" id=\"vc-copy-btn\"><svg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy<\/button><\/div>\n        <div class=\"vc-result-grid\">\n            <div class=\"vc-rcard vc-rcard-primary\"><div class=\"vc-rcard-label\" id=\"vc-r-primary-label\">Sound Pressure<\/div><div class=\"vc-rcard-value\" id=\"vc-r-primary\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">dB SPL<\/div><div class=\"vc-rcard-value\" id=\"vc-r-db\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Sound Pressure<\/div><div class=\"vc-rcard-value\" id=\"vc-r-pa\">\u2014<\/div><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"vc-section vc-open\"><button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"true\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udcd8<\/span><span class=\"vc-section-title\">Theory &amp; Reference<\/span><\/span><svg class=\"vc-section-chevron\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner vc-theory\">\n        <h3>Sound Pressure Level<\/h3>\n        <div class=\"vc-formula-box\" id=\"vc-katex-1\"><\/div>\n        <p>where p\u2080 = 20 \u03bcPa = 2 \u00d7 10\u207b\u2075 Pa (threshold of hearing)<\/p>\n        <h3>A Note on dB(A)<\/h3>\n        <p>This converter works with <strong>unweighted<\/strong> sound pressure levels (dB SPL). An A-weighted level, dB(A), applies a frequency-dependent correction curve that approximates human hearing sensitivity. Because the correction varies with frequency, a single dB(A) value cannot be converted to sound pressure in Pa without knowing the frequency spectrum of the sound. Do not enter dB(A) readings into this tool expecting an exact pressure value.<\/p>\n        <h3>Common Sound Levels<\/h3>\n        <table class=\"vc-table\">\n            <thead><tr><th>Level (dB)<\/th><th>Pressure (Pa)<\/th><th>Example<\/th><\/tr><\/thead>\n            <tbody>\n                <tr><td>0<\/td><td>0.00002<\/td><td>Hearing threshold<\/td><\/tr>\n                <tr><td>30<\/td><td>0.00063<\/td><td>Quiet room<\/td><\/tr>\n                <tr><td>60<\/td><td>0.02<\/td><td>Normal conversation<\/td><\/tr>\n                <tr><td>85<\/td><td>0.36<\/td><td>Heavy traffic<\/td><\/tr>\n                <tr><td>94<\/td><td>1.0<\/td><td>1 Pascal reference<\/td><\/tr>\n                <tr><td>120<\/td><td>20.0<\/td><td>Pain threshold<\/td><\/tr>\n                <tr><td>140<\/td><td>200.0<\/td><td>Jet engine (close)<\/td><\/tr>\n            <\/tbody>\n        <\/table>\n    <\/div><\/div>\n<\/div>\n\n<div class=\"vc-section\"><button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udd17<\/span><span class=\"vc-section-title\">Related Calculators<\/span><\/span><svg class=\"vc-section-chevron\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-related\"><a class=\"vc-related-link\" href=\"\/calculators\/noise-level-addition\/\">Noise Level Addition<\/a><a class=\"vc-related-link\" href=\"\/calculators\/noise-distance-attenuation\/\">Distance Attenuation<\/a><\/div><\/div><\/div>\n<\/div>\n\n<div class=\"vc-section\"><button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\u2753<\/span><span class=\"vc-section-title\">Frequently Asked Questions<\/span><\/span><svg class=\"vc-section-chevron\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-faq-list\" id=\"vc-faq-list\"><\/div><\/div><\/div>\n<\/div>\n\n<div class=\"vc-promo\"><div class=\"vc-promo-text\"><strong>Vibromera \u2014 Portable Balancing &amp; Vibration Analysis<\/strong><br>Professional vibration instruments.<\/div><a class=\"vc-promo-link\" href=\"https:\/\/vibromera.eu\/\" target=\"_blank\" rel=\"noopener\">Learn More<\/a><\/div>\n<footer class=\"vc-footer\"><p>\u00a9 2024\u20132025 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a> \u2014 Engineering Calculators<\/p><div class=\"vc-footer-links\"><a href=\"\/calculators\/engineering-calculators\/\">All Calculators<\/a><a href=\"https:\/\/vibromera.eu\/contacts\/\">Contact<\/a><\/div><\/footer>\n<\/div>\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.js\"><\/script>\n<script>\n(function(){\n    'use strict';\n    var P_REF=2e-5;\n    function $(id){return document.getElementById(id)}\n    function fmt(n,d){if(isNaN(n))return'\u2014';return n.toFixed(d===undefined?2:d)}\n    function fmtSci(n){if(isNaN(n))return'\u2014';if(n>=0.01&&n<10000)return fmt(n,n<1?4:2);return n.toExponential(3)}\n\n    function updateMode(){var m=$('vc-mode').value;$('vc-val-hint').textContent=m==='db'?'(dB)':'(Pa)';$('vc-r-primary-label').textContent=m==='db'?'Sound Pressure':'dB SPL';calculate()}\n\n    function calculate(){\n        var m=$('vc-mode').value,v=parseFloat($('vc-val').value);\n        if(isNaN(v)){$('vc-results').classList.remove('vc-visible');return}\n        var dB,pa;\n        if(m==='db'){dB=v;pa=P_REF*Math.pow(10,dB\/20);$('vc-r-primary').innerHTML=fmtSci(pa)+' <span class=\"vc-rcard-unit\">Pa<\/span>'}\n        else{pa=v;if(pa<=0){$('vc-results').classList.remove('vc-visible');return}dB=20*Math.log10(pa\/P_REF);$('vc-r-primary').innerHTML=fmt(dB,1)+' <span class=\"vc-rcard-unit\">dB SPL<\/span>'}\n        $('vc-r-db').innerHTML=fmt(dB,1)+' <span class=\"vc-rcard-unit\">dB SPL<\/span>';\n        $('vc-r-pa').innerHTML=fmtSci(pa)+' <span class=\"vc-rcard-unit\">Pa<\/span>';\n        $('vc-results').classList.add('vc-visible');\n    }\n\n    $('vc-mode').addEventListener('change',updateMode);\n    $('vc-form').addEventListener('input',calculate);$('vc-form').addEventListener('change',calculate);\n    document.querySelectorAll('.vc-preset-btn').forEach(function(b){b.addEventListener('click',function(e){e.preventDefault();$('vc-mode').value=this.dataset.m;$('vc-val').value=this.dataset.v;updateMode()})});\n    $('vc-copy-btn').addEventListener('click',function(){var t=$('vc-r-db').textContent+' = '+$('vc-r-pa').textContent;if(navigator.clipboard)navigator.clipboard.writeText(t)});\n    document.querySelectorAll('.vc-section-toggle').forEach(function(b){b.addEventListener('click',function(){var s=this.closest('.vc-section');s.classList.toggle('vc-open');this.setAttribute('aria-expanded',s.classList.contains('vc-open'))})});\n    var faqData=[\n        {q:'How do I convert dB to Pascals?',a:'<p>p = p\u2080 \u00d7 10^(SPL\/20), where p\u2080 = 20 \u03bcPa. For example, 94 dB = 1 Pa.<\/p>'},\n        {q:'What is the reference pressure for dB SPL?',a:'<p>20 \u03bcPa (2\u00d710\u207b\u2075 Pa), the approximate threshold of hearing at 1 kHz.<\/p>'},\n        {q:'What is A-weighting?',a:'<p>A-weighting adjusts levels to match human hearing. It reduces low (<500 Hz) and very high (>6 kHz) frequencies. dBA is the standard occupational noise unit. Because the correction is frequency-dependent, a single dB(A) value cannot be converted to Pa without the frequency spectrum \u2014 this tool converts unweighted dB SPL only.<\/p>'},\n        {q:'How loud is 0 dB?',a:'<p>0 dB SPL = 20 \u03bcPa, the quietest sound most people can detect. Not silence, but extremely quiet.<\/p>'},\n        {q:'What is the pain threshold in dB?',a:'<p>Approximately 130\u2013140 dB SPL, corresponding to 63\u2013200 Pa of sound pressure.<\/p>'}\n    ];\n    var fl=$('vc-faq-list');faqData.forEach(function(f){fl.innerHTML+='<div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>'+f.q+'<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\">'+f.a+'<\/div><\/div><\/div>'});\n    fl.addEventListener('click',function(e){var b=e.target.closest('.vc-faq-q');if(b)b.closest('.vc-faq-item').classList.toggle('vc-open')});\n    function renderFormulas(){try{katex.render('\\\\text{SPL} = 20 \\\\cdot \\\\log_{10}\\\\!\\\\left(\\\\frac{p}{p_0}\\\\right) \\\\quad [\\\\text{dB}], \\\\quad p_0 = 20\\\\,\\\\mu\\\\text{Pa}',$('vc-katex-1'),{displayMode:true,throwOnError:false})}catch(e){}}\n    function init(){updateMode();renderFormulas();calculate()}\n    if(document.readyState==='loading')document.addEventListener('DOMContentLoaded',init);else init();\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>\u0414\u044b\u0431\u044b\u0441 \u049b\u044b\u0441\u044b\u043c\u044b\u043d\u044b\u04a3 \u0434\u0435\u04a3\u0433\u0435\u0439\u0456\u043d (\u0434\u0411), \u0434\u0411\u0410 \u0436\u04d9\u043d\u0435 \u049b\u044b\u0441\u044b\u043c\u0434\u044b (\u041f\u0430) \u04e9\u0437\u0430\u0440\u0430 \u0430\u0443\u0434\u0430\u0440\u044b\u04a3\u044b\u0437. SPL = 20\u00b7log10(p\/p_ref). A-\u04e9\u043b\u0448\u0435\u043c\u0434\u0456 \u0441\u0456\u043b\u0442\u0435\u043c\u0435\u0441\u0456 \u0431\u0430\u0440 \u0442\u0435\u0433\u0456\u043d \u043e\u043d\u043b\u0430\u0439\u043d \u0430\u043a\u0443\u0441\u0442\u0438\u043a\u0430 \u049b\u04b1\u0440\u0430\u043b\u044b.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100231","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/kk\/wp-json\/wp\/v2\/calculator\/100231","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/kk\/wp-json\/wp\/v2\/calculator"}],"about":[{"href":"https:\/\/vibromera.eu\/kk\/wp-json\/wp\/v2\/types\/calculator"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/kk\/wp-json\/wp\/v2\/calculator\/100231\/revisions"}],"predecessor-version":[{"id":102130,"href":"https:\/\/vibromera.eu\/kk\/wp-json\/wp\/v2\/calculator\/100231\/revisions\/102130"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/kk\/wp-json\/wp\/v2\/media?parent=100231"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/kk\/wp-json\/wp\/v2\/categories?post=100231"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/kk\/wp-json\/wp\/v2\/tags?post=100231"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}