Question 1

How does the online microphone test work?

Accepted Answer

The microphone test uses the browser's getUserMedia API to request access to your microphone. Once permission is granted, it routes the audio stream through the Web Audio API's AnalyserNode, which continuously analyses the incoming audio data. The volume level is calculated from the RMS (root mean square) of the audio waveform, and the live waveform is drawn on a canvas element using the time-domain data from the analyser. All processing happens entirely in your browser — no audio is sent to any server.

Question 2

Why does my browser ask for microphone permission?

Accepted Answer

Modern browsers require explicit user permission before any website can access a microphone or camera. This is a security feature to protect your privacy. When you click "Allow Microphone & Start Test", your browser shows a permission prompt. You must click Allow for the test to work. If you accidentally clicked Block, you can reset permissions by clicking the lock icon in the browser's address bar, finding the Microphone setting, and changing it to Allow, then refreshing the page.

Question 3

My microphone is detected but the volume stays at 0% — what's wrong?

Accepted Answer

Several issues can cause zero volume despite permission being granted: (1) The wrong microphone is selected as the default device — check your OS sound settings and ensure the correct mic is set as default. (2) The microphone is muted in the OS mixer. On Windows, open Sound Settings → Input and check the volume level. (3) The microphone gain is set to 0 in your audio driver software. (4) On macOS, check System Preferences → Security & Privacy → Microphone and ensure your browser is listed and enabled. (5) If using a USB audio interface, ensure the input gain knob is turned up.

Question 4

What is a good microphone input level?

Accepted Answer

For voice recording and communication, aim for an average speaking level of 40–70% on our volume meter. Peaks should stay below 80–85% to avoid clipping distortion. If your level consistently reads above 80% during normal speech, reduce the microphone gain in your OS settings or audio interface. If it reads below 20%, increase the gain. For optimal voice quality, speak at a consistent distance from the microphone — typically 15–30 cm for condenser mics, and 5–15 cm for dynamic mics.

Question 5

What is the difference between a USB and 3.5mm microphone?

Accepted Answer

USB microphones contain a built-in analog-to-digital converter and audio interface, connecting directly to a computer's USB port. They are self-contained and generally easier to set up. 3.5mm microphones (also called analog or minijack microphones) output an analog signal that must be converted by your computer's built-in sound card or an external audio interface. USB microphones typically offer better audio quality and consistent performance regardless of the host computer's built-in audio hardware. 3.5mm microphones are simpler, less expensive, and work with most devices including smartphones, but audio quality depends heavily on the receiving device's input circuitry.

Question 6

Can I test a microphone that is built into my headset?

Accepted Answer

Yes. Headset microphones work the same way as standalone microphones for this test. When you grant permission, the browser uses whichever device is set as the default microphone in your OS. If your headset mic is set as default, it will be used and its label will be displayed. If you want to test a specific device that is not the default, change it in your OS audio settings before running the test. On Windows: right-click the sound icon → Open Sound settings → Input → select device. On macOS: System Preferences → Sound → Input → select device.

Microphone Tester

How the Microphone Test Works

Microphone Types & Compatibility

USB Microphones

Built-in Laptop Mics

Headset / Combo Jack

Audio Interface Mics

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