{"version":"1.0","provider_name":"Lukas Wojcik - Blog","provider_url":"https:\/\/www.lukaswojcik.com\/blog","title":"Noise Floor Meter: measure the noise floor in dBFS and get the afftdn setting - Lukas Wojcik - Blog","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"6kWqcCWq8H\"><a href=\"https:\/\/www.lukaswojcik.com\/blog\/en\/toolbox\/noise-floor-meter-afftdn-setting\/\">Noise Floor Meter: measure the noise floor in dBFS and get the afftdn setting<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.lukaswojcik.com\/blog\/en\/toolbox\/noise-floor-meter-afftdn-setting\/embed\/#?secret=6kWqcCWq8H\" width=\"600\" height=\"338\" title=\"&#8220;Noise Floor Meter: measure the noise floor in dBFS and get the afftdn setting&#8221; &#8212; Lukas Wojcik - Blog\" data-secret=\"6kWqcCWq8H\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/www.lukaswojcik.com\/blog\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","description":"Finds the quietest passage of an audio file and measures its noise floor in dBFS, the value the nf control of ffmpeg's afftdn expects. Also shows the noise level below the signal, what denoising gained at that level in a measurement, whether the noise is hiss or hum, and a ready ffmpeg command.","thumbnail_url":"https:\/\/www.lukaswojcik.com\/blog\/wp-content\/uploads\/2026\/08\/og-default.jpg","thumbnail_width":1200,"thumbnail_height":630}