A Hz sound tester generates a selected frequency so you can compare how your audio setup reproduces it. Start with a quiet sine tone, adjust in small steps, or run the logarithmic 20 Hz–20 kHz sweep. Listen for changes and rattles without increasing volume to chase frequencies you cannot hear.
Start with your device volume low. 50% here does not guarantee a safe listening level.
Ready when you are. Choose a test to begin.
01 / FIND YOUR FREQUENCY
Hz sound tester and frequency sweep
Precision tones, a full-range sweep, and a closer listen.
20 Hz — 20,000 Hz
Precision audio tone generator
Live synthesis
20 Hz100 Hz1 kHz20 kHz
Tones stop after 30 seconds. Sweeps use a sine wave from 20 Hz to 20 kHz.
A SIMPLE START
How to run this audio check
01
Start with a quiet reference
Select a sine waveform and a comfortable midrange frequency. Lower your device volume before pressing Play tone.
02
Explore slowly
Use the slider, number field, or one-Hz buttons. Keep tests short and stop if a tone is uncomfortable or the equipment rattles.
03
Compare the same range
Run the 20-second sweep, note the frequency region of an issue, and repeat only that region at lower level after a single setup change.
Frequency is pitch, not loudness
Hertz describes cycles per second. A 100 Hz tone and a 1,000 Hz tone differ in frequency, but equal digital amplitude does not make them equally loud to a listener. Speaker response, headphone fit, room acoustics, and hearing all shape the result. The slider chooses a generated frequency; it does not measure the frequency response of your room.
The sweep moves logarithmically so lower and higher portions of the range receive a more useful listening progression than equal-Hz steps. The browser generates the signal locally, but the output device must still reproduce it. Very low or high tones can be weak or inaudible for reasons that this page cannot separate.
Choosing sine, square, sawtooth, or triangle
A sine tone is the clearest starting point for investigating a frequency-specific buzz because it is intended to contain one frequency. The other waveforms include harmonics, so their brighter or buzzier character is expected. Do not interpret the normal sound of a square or sawtooth wave as proof that your speaker is distorting.
Keep waveform and volume unchanged when comparing devices or locations. A different waveform can excite different parts of the playback system, making a comparison harder to interpret. Use the familiar sine setting again before deciding that an unexpected sound is a persistent hardware symptom.
Investigating rattle without overdriving the speaker
If a narrow range produces a buzz, stop and lower the level. Check nearby loose objects before blaming the driver. Repeat the same short tone through another output or with the speaker placed differently, using appropriate handling guidance. A rattle that changes with placement can involve the furniture or enclosure rather than only the speaker cone.
The audible-range button is an informal listening activity. Its highest acknowledged frequency depends on the device and listening conditions and is not a hearing assessment. Do not use it to diagnose tinnitus, hearing loss, or a medical condition, and do not turn up an inaudible high-frequency tone.
What your result may mean
A listening clue is a starting point, not a diagnosis.
Common observations and practical next checks
What you notice
Possible explanation
Next check
Bass becomes weak
The device or room may not reproduce that range strongly.
Compare headphones or another output at low volume.
A narrow band buzzes
A nearby object, enclosure, or driver may resonate.
Lower the level and compare placement before drawing a conclusion.
Square wave sounds buzzy
Its harmonics are part of the generated waveform.
Use a sine wave for a simpler distortion comparison.
Sources & technical references
The tool behavior described here reflects this website’s implementation. These primary references explain relevant browser capabilities or equipment and application settings.
Start with a quiet sine tone, choose a frequency between 20 Hz and 20,000 Hz, and press Play tone. Adjust using the slider or one-Hz buttons. The sweep explores the full range automatically. Keep device volume low and stop if a signal becomes uncomfortable or causes rattling.
Can everyone hear 20 Hz to 20,000 Hz?+
No. That is the generator’s selectable range, not a promise that every listener or device can reproduce and hear every frequency. Equipment, fit, environment, and individual hearing affect audibility. Do not increase volume to force a response, and do not interpret this informal check as a medical result.
Can a tone sweep detect speaker distortion?+
It can help you notice a repeatable buzz, rattle, or change in a frequency region. It does not calculate calibrated distortion or prove which component caused the sound. Compare a short sine tone at a lower level, check nearby objects, and repeat with another output when possible.
Why do different waveforms sound different at the same Hz?+
The selected frequency describes the fundamental, while square, sawtooth, and triangle waves also contain harmonics. Those additional components change the tone’s character. A brighter waveform is not automatically a hardware fault. Start with sine for a simpler comparison and hold waveform and volume constant between checks.