Speaker Test — left, right, stereo, bass and sweep

Test your speakers

Sit where you usually listen, with the speakers in front of you, and tap a test; tap again to pause. The picture shows each side’s level and where the sound sits between them.

How to test speakers

Start with left and right: each should play alone, from its own side. Both together should form a phantom centre right between the speakers; if it pulls to one side, check the balance, the placement and the wiring. The pan sweep should glide smoothly from one speaker to the other.

Then test the range. Pink noise has equal energy in every octave and sounds even on good speakers; the sweep glides from 20 Hz to 20 kHz so you can hear where they fade at each end. For the wiring, use the phase test: one reversed speaker hollows out the sound and the bass.

Good to know

For the best stereo image, sit at the third corner of an equilateral triangle with the two speakers.
Speakers close to a wall or a corner gain bass; pulling them out a little often makes the sound clearer.
Pink noise is used to set up speakers because each octave carries the same energy, roughly as music does.
A reversed speaker cable, plus to minus, thins the bass and blurs the centre: check it with the phase test.

Test	What to listen for	Common problem
Left / right	Each from its own side	Swapped cables
Both	A solid centre between them	Balance off, or one speaker reversed
Left to right	A smooth glide	A hole in the middle: speakers too far apart
Pink noise	An even, smooth hiss	Boomy or harsh: placement or EQ
Sweep and bass	Where it fades at each end	Small speakers stop at 80–150 Hz
Rattle test	No buzzing	Loose panels, shelves, grilles

How do I test my speakers online?

Play the left and right tests to check each side, the centre test for the stereo image, then pink noise and the sweep for their range. The phase test checks the wiring.

How do I know if my speakers are working properly?

Each side should play clearly on its own, the centre should be solid, the sweep should be smooth without buzzing, and the bass should reach at least 60 to 80 Hz on typical speakers.

What is pink noise for?

It has equal energy in every octave, so it sounds even and helps you hear whether speakers are balanced in tone and level.

Mixes

Pick what you need. One tap to start, change anything and save it as your own.

Focus timer

Work in waves.

The Pomodoro rhythm: focus with calm sound in your ears, then take a real break. A soft bell marks every change, so you never watch the clock. Every fourth break is a long one.

25:00Focus · 1 of 4

Silence during breaks

Sound while you work

Breathe

Slow your breathing down.

Follow the circle and the sound: it rises as you breathe in and falls as you breathe out. Choose a rhythm, or set your own, and pick what plays underneath.

Ready

Sound while you breathe

Noise generator

Any color of noise, from deep brown to bright violet — and everything in between.

Brown noise

Noise volume

Spectrum · 20 Hz – 20 kHz

Sound science

The colors of noise

Same randomness, different tilt. Each color shifts energy between low and high pitches — here is what that sounds like.

White

0 dB / octave

Equal energy at every frequency. Because we hear in octaves, it sounds bright and hissy — the classic "TV static".

Pink

−3 dB / octave

Equal energy in every octave, so it sounds even to the ear. Steady rain, rustling leaves. A favorite for focus.

Brown

−6 dB / octave

Deep and warm, like a distant waterfall or a plane cabin. Masks voices and traffic without any hiss.

Grey

Equal-loudness curve

Shaped around how our hearing works, so every pitch seems equally loud. Balanced and soft.

Blue

+3 dB / octave

The mirror of pink: more treble than bass. Airy, crisp, like a light spray.

Violet

+6 dB / octave

Mostly treble, like hissing water. Sometimes used to mask high-pitched ringing.

Calm

Gentle tones to settle into: singing bowls, a slow warm drone, wind chimes tuned so every note fits.

Frequencies

Famous tones on pages of their own: hear them side by side, with honest facts.

Sound phenomena

How sound bends, shifts, rings and fools the ear, and why space is silent: hear it for yourself.

Nature

Rooms & travel

Animals & countryside

A purring cat, whales and dolphins, a nightingale in the dark, cowbells on a summer pasture. Wonderful in stereo.

For babies

Womb sounds are what a baby heard for nine months: a deep rush of blood flow, and the heartbeat.

Hearing and speaker tests

Check your ears, headphones and speakers, each test on a page of its own with a live picture.

Ear Age · 60 seconds

Test your ears.

Our ears lose the highest pitches first, and it starts early. Find the highest tone you can still hear and see the typical age for it.

Headphones on, quiet room
Set a comfortable volume on the 1 kHz tone
Don't turn it up when a tone disappears — that's the point

20,000Hz

Can you still hear it?

Hearing age test →

More ear tests

Check your headphones, find the deepest bass your setup can play, or play any pitch you like.

Headphones check

Left & right

Each ear should get its own side. It matters for 8D, binaural beats and every stereo sound here.

Headphones on, then tap a side.

Bass test

How low can you go?

Deep tones from 200 Hz down to 20 Hz, the bottom of human hearing. Mostly it tests your speakers or headphones.

Tone generator

Any pitch, 20 Hz – 20 kHz

Hz

Tone volume

Start quiet: high tones and square waves get tiring fast.

Take it to bed

An app without the app store.

Add Ears & Waves to your home screen and it opens like any app — full screen, with its own icon. Everything it needs is saved on your device, so it keeps playing on a plane, in a tent or with Wi-Fi off.

Preparing offline mode…

Works offlineNo streaming. Sound is computed on your device, forever.
Screen offKeeps playing with the phone locked. The timer fades it out gently.
PrivateNo account, no ads, no cookies. Your mixes stay on your device.

Speaker test.