Why is there no sound on my computer

The usual reason the computer is silent

When you expected webcam speech and the computer is silent, the usual cause is that the operating system or the meeting app is using a different microphone, or that the webcam microphone is muted or blocked. A second common cause is that speakers or headphones are muted, set to zero, or routed to another output. That second case is playback silence: the computer may still be capturing speech even though you hear nothing locally. This answer is about webcam audio as an input. It does not rest on tests of a named webcam, operating system version, or conferencing app, so control labels and hardware quirks stay general.

Playback silence and capture silence

A computer moves sound in two directions. Output, or playback, is what you hear from speakers or headphones. Input, or capture, is what a microphone records. People describe both failures as “no sound.” For a webcam microphone, the path that matters is capture: the webcam’s built-in mic has to be the selected input, unmuted, and allowed for the app that is recording or sending your voice.

What is silent	What it usually points to	What happens to webcam speech
Speakers or headphones	Output is muted, at zero volume, or set to the wrong playback device	The webcam can still capture speech
Your voice in a call, recording, or input meter	The selected input is wrong, muted, at zero, or missing permission	Speech from the webcam is not captured

Why the picture can appear while speech is missing

A typical webcam presents a camera and a microphone as two devices. The operating system can show video while it ignores the webcam microphone and uses a laptop’s built-in mic, a headset, or no input. A live image is therefore only proof that the camera path is working. Captured speech follows whichever recording device is selected, and a conferencing app uses the input it is given.

Typical causes of missing webcam speech

The items below are ordinary input-selection and permission behaviors on computers that treat a webcam microphone as its own recording device. They are inferences from that design, not measurements or results from a particular product test.

• The default recording device is another microphone, so the webcam mic is unused.
• The webcam microphone is muted in system sound settings, in the meeting app, or by a hardware mute.
• Microphone permission is off for the browser or app, so the webcam mic never reaches the call or recorder.
• The input level for the selected device is at zero.
• The webcam is disconnected, asleep, or held exclusively by another program, so its microphone does not appear as an available input.
• Playback is what actually failed: speakers or headphones are muted while capture continues.

What this means for captured speech

If the selected input is the webcam microphone and it is open, speech is captured from the webcam’s location, which is usually near the lens. If another microphone is selected, the recording still has sound, but it is the other mic’s voice, distance, and room noise. If the webcam mic is muted, at zero, or denied permission, the call or file has no usable speech even though video continues. Voice quality cannot be judged until the intended input is the one actually capturing.

A check that shows whether speech is being captured

Exact menu names differ by system and app version and are not verified here. The useful next action is to separate output from input, then confirm capture with a meter rather than by listening to speakers.

• Decide whether you hear nothing locally, or whether recordings and other people hear nothing. The first is output; the second is input.
• Confirm the webcam is connected and that its camera image appears, which only shows that the video device is active.
• In system sound settings, identify the current input device and match it to the webcam’s microphone name.
• Unmute that input and raise its level above zero. In the meeting or recording app, select the same webcam microphone and allow microphone access if the app asks.
• Speak while watching the input level meter in system settings or in the app. Movement on that meter is the observable check that the intended input is capturing speech. A still meter means speech is not reaching the selected device.

What remains unspecified

This guide does not include documented menu paths for a named Windows, macOS, or Linux version, or for a named conferencing app. Hardware mute switches, vendor camera utilities, and exclusive-mode drivers vary by webcam model and are not identified here. No sensitivity, latency, or frequency-response figures are available for this question. If the meter stays still after the input is selected, unmuted, and permitted, the remaining causes are device-specific and need the webcam’s own documentation or the operating system’s device list for that machine.