Headphone Bass & Hearing Frequency Tester
Test 10Hz–200Hz sub-bass vibration, detect driver voice coil rattle, and benchmark your biological ear hearing age up to 20,000Hz with 100% uncompressed mathematical sine synthesis.
Subwoofer & Headphone Bass Extension
Put on your headphones. We will sweep from 10Hz up to 200Hz. Notice when the vibration becomes physically audible and listen for unwanted plastic buzzing or driver rattle.
Biological Ear Age Benchmark
Set your volume to a comfortable 50%. The tone will ramp smoothly from 8,000Hz up to 20,000Hz. Press "I Can't Hear It Anymore" as soon as the sound disappears to calculate your hearing age.
Your high-frequency hearing extends to 18,200 Hz. Exceptional auditory acuity!
Precision Audio Tone Generator
Select any exact frequency from 1Hz to 22,000Hz with customized waveform shape and independent left/right balance.
🔬 The Human Auditory Spectrum & Equal Loudness
The human auditory system is capable of detecting sound vibrations ranging from approximately 20 Hz to 20,000 Hz. However, human ears do not perceive all frequencies with equal sensitivity.
According to the Fletcher-Munson Equal-Loudness Contours, human ears are exponentially more sensitive to midrange frequencies between 2,000 Hz and 4,000 Hz (the exact acoustic frequency band of human speech and baby cries). By contrast, deep sub-bass frequencies below 50 Hz require significantly more physical acoustic energy (higher decibels) for the human eardrum and inner cochlea to perceive.
At very low frequencies (10Hz–30Hz), you often feel the sound as physical skull and chest vibration rather than hearing a distinct tone. High-end audiophile headphones (like planar magnetic Sennheiser, Audeze, or Beyerdynamic models) reproduce flat bass extension all the way down to 10Hz with near-zero harmonic distortion.
📊 Audiometric Hearing Age vs. Frequency Limits (ISO 7029)
| Highest Audible Frequency | Typical Biological Ear Age | Common Environmental Equivalents | Cochlear Hair Cell Status |
|---|---|---|---|
| 19,000 Hz – 20,000 Hz | Under 20 Years Old | Bat echolocation harmonics, high-pitch mosquito ringtones | Pristine / Peak Acuity |
| 17,000 Hz – 18,000 Hz | Under 30 Years Old | CRT monitor flyback transformer hum, subtle cymbal harmonics | Minor natural age attenuation |
| 15,000 Hz – 16,000 Hz | Under 40 Years Old | Fluorescent light ballast whine, high violin overtones | Typical adult baseline |
| 12,000 Hz – 14,000 Hz | 50+ Years Old | Upper boundary of older audio recordings, telephone landline cutoffs | Moderate presbycusis |
🛠️ 4 Common Headphone Audio Defects Detected by Frequency Sweeps
If you hear a harsh, electric buzzing only between 20Hz and 60Hz, 90% of the time it is caused by a single stray strand of human or pet hair that has pierced the front acoustic mesh and is resting against the paper or mylar driver cone.
Budget earbuds often have driver tolerances with a 3dB to 5dB mismatch between left and right channels. During a center mono sweep, the phantom image will wander from side to side if one driver has higher electrical impedance.
Dropping headphones or listening at extreme volumes can cause the delicate voice coil wire to warp out of the magnetic air gap. When it rubs against the permanent magnet, severe metallic distortion occurs on low bass notes.
If bass completely disappears below 50Hz on in-ear earbuds, your silicone ear tips do not have an airtight acoustic seal in your ear canal. Switch to a larger ear tip size to immediately restore deep 20Hz sub-bass response.
Frequently Asked Questions
Can high-frequency tones damage my headphones or hearing?
Never test at maximum volume. High frequencies carry significant electrical energy even if you cannot hear them. Keep your operating system volume around 40%–50% to prevent headphone tweeter thermal overload and avoid acoustic trauma.
Why can young children hear high-pitched sounds that adults cannot?
Microscopic stereocilia hair cells located near the base of the inner ear cochlea respond to high frequencies. Because every sound you ever hear passes through the base first, these cells sustain cumulative mechanical wear and aging over decades, gradually lowering the ceiling of audible sound.
What is the difference between pink noise and white noise?
White noise has equal energy per cycle, meaning higher octaves contain much more power (sounding like intense television static). Pink noise has equal energy per octave, rolling off at 3dB per octave, which mimics the natural frequency distribution of human music and nature (rain or waterfalls).