Mic Test
Input RMS and sample peak are digital dBFS, not calibrated sound pressure. Audio is not recorded.
Related tools
- Pitch Detector — Identify one live pitch, then interpret note, Hz and cents.
- Singing Note Detector — Identify the note in a clear singing or humming sound.
- Spectrogram Viewer — Inspect broader frequency structure over time.
Check whether microphone audio is reaching your browser and inspect its waveform, digital RMS level and sample peak. The Mic Test provides immediate input feedback without making a voice recording. It is a useful first step when a pitch tool is silent or an online call does not seem to receive your voice.
Check the input
- Open the page over HTTPS.
- Select Start microphone and approve access.
- Speak at a normal level and watch the waveform and numbers.
- Pause briefly to compare speech with the room background.
- Use Stop when finished.
A changing waveform shows that samples are reaching the tool. Check whether it responds to your own voice, not only to a fan, speaker or another microphone in the room. The app receives the input selected by your browser and system; it does not display a separate device-selection menu in this interface.
Read RMS and peak separately
RMS describes the signal’s average energy over the analyzed window, while sample peak identifies its largest sample magnitude. A short sharp event can raise the peak strongly without creating the same sustained RMS level.
The readings are digital dBFS, measured relative to full scale. Values below zero indicate a level below the digital maximum. A difference in these numbers is not automatically the same difference in acoustic loudness at your ears.
For a simple calculation, a digital amplitude ratio of 0.1 corresponds to −20 dBFS under the 20 log₁₀ relationship. That does not identify a sound-pressure level in the room, because microphone sensitivity and gain are not calibrated here.
Recognize clipping and weak input
The tool flags samples near full scale as clipping. If ordinary speech repeatedly reaches that condition, reduce input gain or adjust distance, then repeat. A clipped waveform can make later pitch or audio analysis less trustworthy.
A very small waveform may mean a distant source, low gain, the wrong input or a genuinely quiet room. Do not solve every low reading by speaking much louder. First verify the microphone and routing that the browser is using.
A signal can be visible yet unsuitable for a pitch detector. Breath, consonants and broadband noise have energy without necessarily supplying a clear periodic fundamental. Use the main Pitch Detector with one sustained pitched sound after confirming the input path.
Troubleshoot permission and routing
If access was denied, review microphone permission for this site and your operating system, then start again. A browser may also need access to the intended external interface or headset. Check whether another application has selected or occupied a different input path.
If the waveform responds to the laptop microphone instead of your headset, change the browser or system input selection and restart the test. The tool cannot infer which physical microphone you meant to use simply from the signal.
Wireless headsets can use different modes for communication and playback. This test confirms received audio under the current configuration; it does not certify a codec, wireless latency or the best settings for every calling application.
Input testing is different from playback testing
The waveform does not play your voice back to you. This page has no recording, download or microphone-monitoring control. Hearing nothing while the waveform moves is therefore not by itself a failure of this input test.
A speaker or headphone problem is a separate output question. The Tone Generator can provide a comfortable reference sound for a basic listening comparison, but it is not an acoustic calibration. Avoid sending a loud output back into an active microphone.
Use the microphone check before analysis
Once input is confirmed, choose the task you actually need. The Singing Note Detector identifies a clear vocal pitch. The Frequency Detector focuses on a fundamental in hertz, while the Spectrogram Viewer shows broader spectral content.
Those tools may reject an input that this waveform test displays, because each has its own analysis requirements. A functioning microphone is necessary for live analysis but does not guarantee a reliable note, frequency or source interpretation.
Make a useful repeat check
Keep the same short spoken phrase, microphone distance and system gain when comparing setups. Note which device and application route you used. Otherwise, a louder result can reflect a gain change rather than a better microphone.
This workflow processes input locally in memory and does not record or upload the microphone audio through the plugin. The page does not provide a saved test report. Stop when finished and keep any observations you need separately.
Frequently asked questions
Can I listen to my recorded voice here?
No. The current Mic Test displays input but does not record or replay it.
Does a moving line prove the right microphone works?
It proves some input is reaching the browser. Verify that the response comes from the device you intended.
Are the readings sound-pressure decibels?
No. They are digital RMS and peak readings in dBFS, without acoustic calibration.
Can this rate my singing or microphone quality?
No. It checks received signal behavior. Overall singing ability or microphone quality requires different evidence.