BEFORE YOU SAY “CAN YOU HEAR ME?”

Make yourself heard.

Get to know your microphone. Check the levels, try your voice, and listen back.

Your voice. Your device.Nothing to upload.

START WITH THE RIGHT INPUT.

Your microphone

Input device

Device names become available after you grant access. Stop the input before changing devices or settings.

Requested processing

Requested values are preferences. The browser or operating system may deliver something different.

Echo cancellationNot reported as supportedNoise suppressionNot reported as supportedAutomatic gain controlNot reported as supported

Access only after you choose Start.

Last check details

Start a check to see the delivered sample rate, channels, and processing settings. Unreported values stay unreported.

Levels tell part of the story.

A louder signal isn’t always a clearer one. Keep some headroom, use your normal speaking distance, and trust the playback.

Your live input

Start when you’re ready. Your microphone is off.

MICROPHONE OFF

Waveform

Waiting for input · normalized amplitude

+1−1

Frequency spectrum

Relative display · not a calibrated frequency response

Low frequenciesHigh frequencies

Digital input level— dBFS RMS

−80−60−40−200 dBFS

RMS LEVEL— dBFS

Average energy in this window

SAMPLE PEAK— dBFS

Largest absolute sampled value

NEAR FULL SCALE— samples

At or above 0.99 amplitude

Ready when you are

Start the microphone, then speak naturally to see its digital input level.

2048-sample analyzer snapshots, about 20 times/sec. Windows may overlap or miss peaks. dBFS is digital level relative to full scale; it is not sound pressure (dB SPL).

TWO MOMENTS. A LITTLE PERSPECTIVE.

Compare quiet with speech.

Same microphone and settings. Different conditions.

GUIDED CHECK

Let the room speak.

Stay quiet for 5 seconds to capture a baseline of this scene.

Not measured yet

Now, say a little hello.

Speak naturally for 5 seconds at your usual microphone distance.

Baseline comes first

Scene-dependent comparison, not hardware SNR or an intrinsic noise floor. Browser/OS gain, noise suppression, room sound, and distance can all change these values. These steps measure levels without saving an audio recording.

THE MOST USEFUL CHECK IS A LISTEN.

Record a little, hear it back.

One local sample · 30 seconds maximum · 10 MB guardrail

A quick hello is enough.

Start your microphone, then choose Record sample. No recording starts automatically.

0.0 / 30s

MediaRecorder is unavailable. Live measurements remain usable.

Starting a new check replaces the current sample. Hiding or leaving this page stops capture. Nothing is recorded in the background.

A little guidance before your next call.

Understand digital input levelsPractical checks, honest limitations Leave room for louder momentsPractical checks, honest limitations Compare your room and your voicePractical checks, honest limitations When your microphone won’t connectPractical checks, honest limitations

Make yourself heard.

Your live input

A sound check, on your terms.

Waveform

Frequency spectrum

Ready when you are

Compare quiet with speech.

Let the room speak.

Now, say a little hello.

Record a little, hear it back.

A quick hello is enough.

A little guidance before your next call.