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If you see any bug or have a feature request, please fill out the bug report form on the addon's homepage (). Quest Technologies comes with a new extremely easy-to-use Basic Series Sound Decibel Meter for obtaining the most commonly required noise measurements. You must first antilog each number, add or subtract and then log them again in the following way: For example, adding three levels 94.0 + 96.0 + 98. When you open the app for the first time, please open it in the window or tab to see the microphone permission dialog. Sound levels are generally expressed in decibels, which are logarithmic and so cannot be manipulated without being converted back to a linear scale. Note: The interface for this app can be opened in a separate window, new tab, or toolbar popup (choose a context from the toolbar button's right-click menu). You can also change the capturing sound API via the buttons at the top-right. On the top toolbar within the interface, you see several pieces of information about the surrounding sound. If your computer does not have a microphone, please attach one to it before using the add-on. It uses the microphone in your system to capture the surrounding sound. Once the loader is disappeared, the add-on is ready to use. So please be patient while the add-on is getting ready. Also, note that the app may take a few seconds before getting ready. Please accept the dialog box to start the add-on. When you open the app for the first time, it may ask you about microphone access. This add-on helps you easily measure some important sound factors, such as the sound level in decibel, noise level, sound average, and normalized sound value. Measure the surrounding sound (dB) and noise with your computer's microphone! Sound Meter (Noise & Decibel) extension enables you to measure the surrounding sound (dB) and noise with your computer's microphone.