Microphone

Intended to perform testing on the device’s built-in microphone device.

• Device with built in internal microphone.
• Headphone Jack for earphone with mic (optional).

You can clap or make some noise near the device and the vumeter will fluctuate according to the loudness of the sound it gets from the mic. Make sure to set the mic sensitivity level in the OS sound settings to a position where you can clearly see changes in the vumeter sound level.
Repeat this test using an external earphone mic if a headphone jack is available. The focus is on the headphone jack function, make sure the internal mic switches to the external when the earphone plug is plugged in.

Technically, since this get raw data audio from mic can compromise privacy, the get audio from mic is not available unless the user approves it, so user must answer the Block or Allow confirmation from the browser when the page loads.