This bass test plays pure low-frequency tones from 20 to 250 Hz so you can hear, or fail to hear, exactly what your audio device does at the bottom of the spectrum. Pick individual tones to compare, or run the descending sweep and note the frequency where the sound fades out: that number is your device’s practical bass floor, and it says a lot about what you own.
One thing this test is honest about, because most bass tests are not: every device has a floor, and for phone speakers it is high. A tiny speaker physically cannot move enough air to produce deep bass, so a phone falling silent below 150 or 200 Hz is engineering reality, not damage. The test exists to tell you two different things depending on what you are testing.
What the Results Mean by Device
- Phone and tablet speakers: Expect clean sound from about 200 Hz up, weakening output down to roughly 150 Hz, and near silence below that. Some phones fake lower bass with psychoacoustic tricks in music, but a pure tone reveals the truth. A phone that used to handle 200 Hz cleanly and now buzzes there has a debris or hardware issue, not a bass limitation; run the speaker cleaner before assuming the worst.
- Earbuds and headphones: Sealed in-ears reach surprisingly deep, often 30 to 40 Hz, and over-ear headphones commonly manage 25 to 50 Hz. The catch is the seal: an earbud that lost its bass usually lost its fit, since deep bass leaks away the moment the ear seal breaks. Try a different tip size before blaming the driver, and if bass crackles rather than fades, our headphone test has a dedicated driver rattle check.
- Subwoofers and speaker systems: This is where the 20 to 40 Hz chips earn their place. A subwoofer should produce clean output near its rated floor, and the descending sweep doubles as a room test: rattling doors, windows, and shelf objects announce themselves at specific frequencies, which is genuinely useful for placement tuning.
Bass and Volume: A Warning Worth Repeating
Low frequencies are deceptive. At 30 Hz your ears register far less loudness than the driver is actually producing, so the temptation is to push the volume up until you “hear it properly.” With headphones on, resist that: the driver is working hard even when the perceived loudness is low, and sustained loud sub-bass is fatigue and risk with little reward. Start at moderate volume, raise gradually, and treat the point where you feel pressure as the ceiling. On phone speakers, the same push has a different cost: maximum volume at frequencies the speaker cannot reproduce just stresses the driver to produce distortion.
Why a Speaker Buzzes on Bass Tones
A clean tone that arrives with a buzz, flap, or rattle riding on top means something is vibrating that should not be. On phones the usual suspect is debris in the speaker chamber or a loose case, both covered in our vibrating sound guide. On larger speakers, check the grille and anything touching the cabinet. The diagnostic power of a pure tone is that the buzz appears at a repeatable frequency: find it, hold the tone there, and hunt the rattle with your hand.
Going Deeper
These chips cover the bass region; for full-spectrum freedom, the frequency generator plays any tone from 1 Hz to 20 kHz with four waveforms. And for checking whether both speakers of a stereo pair carry the bass equally, the sound test isolates each channel.
FAQ
What is a good bass test frequency?
It depends on the device. For phone speakers, 150 to 250 Hz shows what they can actually do. For headphones and earbuds, 40 to 60 Hz separates decent drivers from weak ones. For subwoofers, 20 to 30 Hz tests the rated floor. The descending sweep finds your device's limit automatically.
Why can't I hear the 20 Hz or 30 Hz tones?
Two reasons stack: most devices cannot reproduce frequencies that low, and human hearing is very insensitive down there even when the sound exists. On phone speakers, silence below 150 Hz is normal physics. On good headphones at moderate volume, 30 Hz is more felt as pressure than heard as a note.
My phone speaker buzzes on bass. Is it broken?
Not necessarily. First separate two cases: buzzing only at maximum volume is the tiny driver hitting its limit, which is normal. Buzzing at moderate volume on tones the phone handles otherwise points to debris in the speaker chamber or a rattling case, and a sound based cleaning cycle usually clears the debris case.
Why did my earbuds lose their bass?
Almost always the seal, not the driver. Deep bass depends on an airtight fit, and a worn or wrong-size ear tip leaks it away. Try other tip sizes and clean the mesh of earwax with a dry brush; if bass crackles rather than just fading, run a driver check.
Is playing bass tones bad for my speakers?
At moderate volume, no; a sine tone is ordinary audio. The combination to avoid is maximum volume at frequencies below the device's range, which forces the driver to strain producing sound you cannot hear. Short tests at reasonable volume are completely safe.