Mic Test: Is Bad Audio Coming From Your Mic or Your Room?

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Before you start: Take headphones off so the mic hears your room, sit at your normal call distance, and click once.

Your browser will ask for microphone access. Audio stays on this device and is never uploaded.

One click · 3 automatic 13-second rounds (~45 s total)

Ready when you are: one click, then follow the prompts here.

One click runs 3 automatic 13-second rounds back-to-back (~45 seconds total). Each round measures the same 3 phases:

1. Phase 1: Silence (5 s)Say nothing. The bench reads the hiss, the fans and the street hum.
2. Phase 2: Normal speech (5 s)Speak the way you do on a call, at your usual distance.
3. Phase 3: One hand clap (3 s)Clap once, sharply, at arm length, then stay still while the echo dies.

What you get: one noise number that decides the verdict, plus speech to noise and how long your room rings after a clap. The three rounds count only if their numbers repeat.

Why 3 rounds One clap can lie. If the noise floors of the three rounds sit more than 3 dB apart, something changed between rounds: the bench says so and gives no final verdict.

These are dBFS (digital level), not calibrated dB SPL like a sound meter. No audio and no video leave this device.

The ranges behind the verdict

• Noise floor (A)above -55 dBFS(A)Above -55 dBFS(A) with a dry room (RT60 under 0.4 s): the noise comes from a fan, the laptop or the mic itself, so fix the source, not the room.
• RT60, dryunder 0.4 sthe room is not the problem.
• RT60, ringingover 0.6 sreflections smear the voice: the verdict is the room.
• SNRunder 30 dByour voice sits too close to the floor: distance or gain.