Sound Decibel Meter Online

Signal Atlas / Local audio path

Speaker Check Lab

A focused set of browser-local signals for checking stereo routing, phase, and frequency response.

Start at a low system volume. Channel checks continue until you click the same side again; other signals stop automatically.

Ready for a quiet start.

01 / Stereo route

Left / right channel check

Choose a side. The tone is sent only to that channel.

02 / Upper response

High-frequency checkpoints

Short tones for a quick equipment and listening check.

The highest test may exceed a device or listener’s usable range; a quiet result is still useful information.

03 / Speaker alignment

Polarity & phase

In phase should feel centered and solid. Out of phase tends to sound wider and thinner.

04 / Target tone

Sine wave generator

05 / Full response

Frequency sweep

A rising 20 Hz to 20 kHz sweep helps reveal rattles, dropouts, and crossover changes.

06 / Reference noise

Noise generator

Use short bursts to check a room, a driver, or an audio path.

Field notes / after the test

How to Use Speaker Test

These short, browser-local signals are most useful when you know what to listen for. Keep your system level low, repeat a cue only long enough to notice it, and compare one change at a time.

  1. 01 / Stereo route

    Confirm the labelled side

    Start with the left and right buttons. Each tone should arrive from the matching speaker or ear cup. If it appears elsewhere, check placement, channel balance, and output routing before judging the sound itself.

  2. 02 / Frequency sweep

    Follow the climb

    A sweep should rise smoothly from bass to treble. A buzz can come from a cabinet, desk, nearby object, or room resonance; a sudden dip can come from the speaker, output processing, or the listening position.

  3. 03 / Phase relationship

    Compare the centre

    In phase usually feels centred with firmer bass. Out of phase often feels wider and lighter. If the expected in-phase result lacks weight, inspect the positive and negative wire alignment on one physical speaker.

  4. 04 / White and pink noise

    Choose the reference

    White noise spreads energy evenly by frequency and can feel bright. Pink noise spreads energy by octave and usually sounds more balanced. Use both in short bursts to compare a room, driver, or audio path.

Quick answers

Speaker test questions

Does hearing a test tone prove my speakers are fine?

It confirms that this browser audio path and the connected output can reproduce that signal. If only one app is silent, first check that app's mute state, volume mixer, and selected output device.

Can I use this check with headphones?

Yes. The left and right test is especially useful for confirming that each ear cup is worn on its labelled side. Begin at a low level because headphones place the signal close to your ears.

How can I listen for a phase problem?

Compare the in-phase and out-of-phase controls from your usual listening position. A reversed connection often makes the in-phase result seem thin or unfocused, but room placement can also change what you hear.

What should I hear during the frequency sweep?

Expect one continuous tone that climbs in pitch. Note a rattle, sharp change in loudness, or a point where the signal becomes hard to hear, then repeat once at a modest volume to compare the result.

Why might the highest tones be quiet or absent?

The upper range depends on the speaker or headphones, browser output, listening level, and the individual listener. This page is a listening check, not a hearing or equipment diagnosis.

What is the practical difference between white and pink noise?

White noise has equal energy at each frequency, so its high end is prominent. Pink noise has equal energy per octave and tends to feel deeper; it is commonly used as a broad reference when tuning sound systems.

Protect your hearing while testing

Begin softly and stop if a sound feels sharp or uncomfortable. Use the Sound Decibel Meter for a local noise estimate, then see Safe Decibel Levels for time-based context.