Decibic

Audio check

Microphone test

Confirm that your browser receives a real signal, inspect its level, and check which input is active.

Before you start

Start microphone asks for browser microphone permission. The page receives live audio samples from your chosen input and analyzes them locally for the meter, waveform, and diagnostics. It does not record, store, upload, or send audio; nothing leaves this page. Choose Stop or Reset to release the microphone. You can also close the page, or revoke access in your browser’s site settings.

ReadyNo permission has been requested. Start when you are ready.

How to use

  1. Choose Start and respond to the browser permission prompt.
  2. Speak normally; watch the waveform and real dBFS readings move.
  3. If available, compare inputs. Choose Stop when finished.

Live signal

Readings come only from samples received during this session.

Not running
Current RMS level —
Frame peak—
Session peak—
Near-full frames—
Analyzed time—

Waiting for real microphone samples. No reading is estimated.