OneTaskBy Tim King · Updated
Camera and Microphone Check
Test Your Webcam and Mic Together Before a Video Call, With Level Meter
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How the Camera and Microphone Check works
This camera and microphone check tests both devices at once, the way a video call uses them. You see your picture, a live level meter shows how loud your voice arrives, and the stats confirm which devices are in use. Run it a minute before a meeting. Nothing is recorded or uploaded.
Most call problems are not the network. They are the wrong microphone, a muted headset, a camera held by another app or a voice that peaks into distortion. Testing both devices together, with the same processing a call app uses, catches all of these before anyone is waiting for you.
How the camera and microphone check works
Press Start check and the browser asks to use your camera and microphone. The picture appears in the preview. Under it, a meter shows the loudest sample in each moment of audio on a decibel scale from -60 to 0 dBFS, where 0 is the loudest the system can record.
The stats update every second with the device names, the picture size, the sample rate, the peak level over the last second and whether the browser has echo cancellation and noise suppression switched on. Call apps such as Meet and Teams ask for the same processing.
Reading the level meter
| Meter colour | Peak level | Meaning |
|---|---|---|
| Green | Below -12 dBFS | Normal speech; aim for peaks around -20 to -12 |
| Orange | -12 to -3 dBFS | Loud but clean; fine for short bursts |
| Red | Above -3 dBFS | Close to clipping; move back or lower the input gain |
If the meter barely moves while you talk, check the device name first. A headset that is not selected, or a laptop mic under a closed lid, is the usual cause.
Echo cancellation and noise suppression
Echo cancellation stops the other side hearing themselves when your speakers feed back into your mic. Noise suppression removes steady sounds such as fans and air conditioning. Both should read On for a normal call. Musicians and podcasters sometimes switch them off in their call app to keep the full sound, at the cost of more room noise.
Tips and pitfalls
Wear headphones if you can. They stop echo at the source and let echo cancellation work less hard, which keeps your voice clearer.
Light from the front. A window behind you turns your face into a silhouette. Face the light or put a lamp behind your screen.
Choose devices in the address bar. If the wrong camera or microphone appears, change it from the camera icon in the address bar and press Start check again.
How to read the result
A clear picture, the right device names and a meter that sits in the green and touches orange when you speak up means you are ready for the call.
FAQ
Why does the meter not move when I talk?
The browser is probably using a different microphone from the one you are speaking into. Check the Microphone stat, then change the device from the camera icon in the address bar. Also check for a hardware mute switch on a headset or its cable.
What level should my microphone be at?
Normal speech should peak around -20 to -12 dBFS, in the green with the odd touch of orange. If you see red often, lower the input gain in your system sound settings or sit a little further from the microphone.
Is my video or audio recorded or uploaded?
No. The picture and sound stay inside this page while the check runs and are never stored or sent anywhere. Press Stop or close the tab and the camera and microphone are released straight away.
Does this test my internet connection too?
No. It checks only your camera and microphone on this device. Call quality also depends on upload speed, so if people say you freeze while this check looks fine, the network is the place to look next.
See also: all Video & Screen tools, Images, Audio, PDF, SVG, Simulations & Screensavers, Generative Art, Chart Makers, 3D Model Viewers, Drawing Pads, Mockups & 3D Making, Diagram Makers, 3D Science, Tracker Music.
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