Mosquito Tone Test - Check Your High Frequency Hearing Age
Overview
Mosquito Tone Test. The Mosquito Tone Test plays a 17.4kHz high-frequency tone that young ears pick up easily and most adults can't — set the volume slider low first, then click Play and raise it gradually until you either hear the tone or confirm you can't. Try the Steady, Modulated, and Frequency Sweep variants for a fuller picture of your high-frequency hearing. Switch between sine, square, sawtooth and triangle waveforms using the free tone generator, then set volume and stereo balance.
Can your ears still pick up a sound most adults have stopped noticing? The mosquito tone test plays a thin, high-pitched tone at the top of the human range, steps you up through higher pitches, and turns the highest one you hear into an estimated hearing age. Put on headphones, start quiet, and you'll know in about a minute whether you still hear what teenagers hear.
How the Mosquito Tone Test Works
Behind the play button is a browser tone generator built on the Web Audio API. Each tone starts with a short fade-in and ends with a fade-out, so you hear a clean tone instead of a click. The ladder runs from 8 kHz up to 22 kHz, and you can switch any step to a pulsed tone, which stands out better against room hiss. Think of it as high-frequency screening, a quick look at the top of your frequency range, not a full audio exam. A 5.1 or 7.1 receiver sounds cohesive only when the channel level test tool has put front, center and surround channels at equal levels.
Steady Tone, Modulated Tone and Frequency Sweep
You get three ways to play the mosquito tone:
- Steady tone – a single sine tone held at the classic mosquito setting and mastered at -3dBFS, leaving headroom so it never clips.
- Modulated tone – the tone glides from 17 to 20 kHz about 3 times per second. Movement is easier to notice near your limit.
- Frequency sweep – one smooth high-frequency tone that rises through the whole range, so you hear where it fades.
Running the Test Tones in Order
- Pull the volume slider down to about a quarter before you press play.
- Play the lowest step first. If you hear it, your playback chain works.
- Step up through 10 kHz, 12 kHz, 14 kHz and the higher steps, marking each one as clear, faint or silent.
- Write down the highest of your test tones that was clearly audible. That number is your result.
The same ladder is in the mosquito tone test audio downloads, offered as MP3, WAV, OGG and M4R files.
Using the Manual Threshold Finder
The quick ladder jumps in whole steps, so the slider narrows the gap. Here's a worked example. You're 33 and wearing a wired over-ear set. You hear every step clearly up to 15 kHz, catch 16 kHz faintly in one ear only, and hear nothing above that. On the slider, the tone vanishes at 16.3 kHz in your left ear and 15.9 kHz in your right ear, 400 hertz apart, which is a normal gap. This more precise audibility test puts your cutoff about one step below the mosquito range, typical for someone in their thirties.
Where the Mosquito Sound Came From
The mosquito sound began as a crowd-control product. It was meant to move loitering teenagers and other young people away from shop doorways. In a quiet environment, the timing discrimination test online tests how well your hearing resolves time, a psychoacoustics topic often linked with age.
The Anti-Loitering Mosquito Device
In 2005, Compound Security Systems in South Wales began selling an anti-loitering speaker called the Mosquito. Shops and shopping centers mounted the mosquito device by their entrances. Its tone was uncomfortable to younger listeners and silent to most of the staff nearby. The maker listed a peak output of 108dB, loud enough to harm your hearing in a few minutes. Teenagers then turned the trick around: they set the tone as a mobile phone ringtone that their teachers couldn't hear in class.
Why 17.4 kHz Became the Standard Pitch
This setting sits right on the line between ages. To compare it with music, measure it against the top key of a piano (about 4,186 Hz):
$$\text{octaves above} = \log_{2}\left(\frac{17{,}400}{4{,}186}\right) \approx 2.06$$That's about two octaves above the highest note on the keyboard. High pitched sounds this far up are the first to fade with age, which is why this step on the ladder is where most results split between under-25 and older listeners.
Mosquito Tone Frequencies and the Upper Limit by Age
Healthy young ears hear from about 20 Hz to 20,000 Hz. That upper limit comes down over the years, and it usually falls faster after your late twenties. The table shows roughly where each step of the test drops out. People of the same age can differ by several kHz.
| Highest tone you hear clearly | Typical listener | What it suggests |
|---|---|---|
| 8 kHz | Nearly everyone | Baseline; missing it is worth a professional check |
| 10–12 kHz | Most adults into their fifties or sixties | Normal for older listeners |
| 14–15 kHz | Typically under about 40–45 | Common for adults over 30 |
| 16 kHz | Typically under about 32 | Upper range still in good shape |
| 17.4 kHz (mosquito) | Mostly under 25 | Few listeners over 25 hear it |
| 18 kHz – 19 kHz | Teens and early twenties | Unusually sharp high-end hearing |
| 20 kHz – 22 kHz | Children; 22 kHz mostly tests your equipment | Near-ultrasonic, at the edge of playback |
Above roughly 20,000 hertz, sound counts as ultrasonic. Very few people hear it, so the top steps of mosquito tones check your equipment as much as your ears.
A Pure Sine Wave With No Harmonics
Nothing about the tone is high-tech. It's a plain sine wave, the simplest sound there is, with a single frequency and no overtones. You can make the same signal in Audacity in a few seconds. Put a clean file through a frequency analyzer and you should see one sharp spike. Any extra peaks lower down are harmonic distortion from the gear, and they can sound like the tone when it's out of range.
Reading Your Hearing Age Test Result
Your result is a data point about your high-end perception, not a grade. The ear age it gives is a rough estimate, and treating this age test as a measure of your overall hearing will mislead you.
Clear at 17 kHz and Above
If both of those top steps are clear, your top-end hearing is in excellent condition. That's expected in your teens and early twenties, and it's a good sign at any older age. Steps at 18 kHz or 19 kHz that still come through clearly are rare for adults.
When the Top Steps Turn Faint
A tone you think you hear but can't confirm is a borderline result. A loud day can cause temporary threshold shift, a short-term dip in sensitivity that recovers overnight. Ambient noise from a fan or traffic can hide a quiet tone. Retest in the morning in a silent room.
Hearing Age vs a Real Audiogram
This is an uncalibrated browser screening and not diagnostic. A clinical audiogram is an audiometric test done in a sound-treated booth with calibrated equipment. It focuses on the speech frequencies, about 250 Hz to 8 kHz, where you understand words. Missing 17 kHz in your forties is normal. Missing 8 kHz at any adult age is a reason to see an audiologist. Formal audiometry and audiology care can find speech-range loss that this test never checks.
Checking My Ear Age Before Signing Off a 128 kbps Podcast Export
I'm 41, and a client wants their 212-episode podcast archive re-exported as 128 kbps MP3 to cut hosting costs. The LAME encoder's default low-pass at that bitrate sits at 17 kHz, so the real question is whether I can even hear what that filter removes. If I can't, my ears aren't a valid judge and I need a spectrum view instead.
At 8:40 a.m., before any editing, I set the volume slider to about a fifth and run the quick ladder on my wired studio set. 14 kHz is clear, 15 kHz is faint, 16 kHz is silent. Then I use the manual slider: the tone disappears at 14.6 kHz on the left and 13.8 kHz on the right.
That 0.8 kHz gap bothers me, so I check it before trusting it. I turn the headset round so each cup sits on the other ear and run the slider again. The low reading stays with my right ear (13.7 kHz), so the gap is in my hearing, not in one driver.
| Run | Left | Right |
|---|---|---|
| 8:40 a.m., rested | 14.6 kHz | 13.8 kHz |
| Cups swapped | 14.5 kHz | 13.7 kHz |
| 4:15 p.m., after six hours of editing | 13.9 kHz | 13.2 kHz |
My best ear stops 2.4 kHz short of the encoder cutoff, about 0.22 of an octave. By the afternoon, after a day of moderate listening, the gap grows to 0.29 octave. That drop is the part people miss: the same person's ear age reads differently at the end of a workday, so a late test makes you look older than you are.
The decision is clear. I can't approve the 17 kHz cutoff by ear, so I check it against a spectrogram of three sample episodes, looking for sibilance and room tone above 16 kHz that the export would remove. In my view, the number that matters most is the morning threshold of my better ear, because it sets the most I can hear. The right-ear gap goes on my list for an audiologist visit. It isn't alarming at 41, but a proper audiogram will show whether it extends down into the speech range.
Presbycusis and the Teenager Audio Test
The teenager audio test works because of presbycusis, the gradual loss of high-frequency hearing with aging. Inside the cochlea, the spiral organ of the inner ear, different hair cells respond to different pitches. The ones that pick up the highest pitches sit at the entrance, so they wear out first. In psychoacoustics research this top-down decline shows up again and again: sensitivity starts to fall in your late teens.
How Age-Related Hearing Loss Starts at the Top
Age-related hearing loss isn't only about birthdays. Loud music, years of noise at work, ear infections and ototoxic medications (some antibiotics and chemotherapy drugs) all damage the same outer hair cells. These cells don't regrow, so the damage adds up. Tinnitus, a ringing or hiss that nobody else hears, often appears in the same high range. On the ladder, that damage shows up as a lower cutoff, so losing the mosquito tone early can reflect noise exposure as much as birthdays. Some 50-year-olds still hear tones that some 22-year-olds in loud bands already can't.
Why Speakers Skew Mosquito Ringtones and Test Files
Most mosquito ringtones are shared as MP3 files, and an MP3 is a weak format for a top-end tone. Lossy compression saves space by removing sounds it expects you to miss, and very high frequencies usually go first. The compression artifacts left behind can be lower sounds you hear even when the real tone is gone. Pick the file format with care:
- WAV – uncompressed, so a WAV file keeps the tone exactly as generated. Best for testing.
- OGG – compressed, but usually clean at high bitrates. An OGG copy is a fair backup.
- MP3 – the most common and the riskiest, since many MP3 encoders trim the top of the range.
- M4R – Apple's ringtone format. An M4R file is meant for an iPhone alert, not careful listening.
Laptop Speakers and Bluetooth Codecs
Laptop speakers and small phone drivers roll off sharply well below the mosquito range, and cheap earbuds often do the same. The tiny tweeter can't move fast enough, so you end up testing its frequency response instead of your hearing. In our worked example, the same 33-year-old tops out at 14 kHz on the laptop's built-in drivers, 2 kHz lower than through a headset. Bluetooth codecs such as SBC and AAC can apply a low-pass filter around 16–20 kHz to save bandwidth. The file's sample rate also matters: 44.1kHz audio tops out at 22.05 kHz, which gives only about 2.5 samples for each cycle of the mosquito tone. Poor converters can create aliasing and total harmonic distortion (THD) that you might mistake for the real tone.
Wired Headphones in a Quiet Room
For a result you can trust, use wired headphones in a quiet room. Closed over-ear headphones or decent in-ear monitors both reproduce the top octave with a flat frequency response. Room acoustics matter less with a headset. If one ear reads much lower than the other, check for wax first: built-up cerumen blocks exactly the high frequencies this test depends on.
Mosquito Test Myths and Hearing Damage
A few myths about the mosquito test keep spreading:
- "If I hear something, I'm hearing the tone." Not always. Distortion and compression can create lower mosquito sounds that aren't the real signal.
- "Only people under 25 can hear it." Age is a strong predictor of your perception at the top end, not a rule.
- "A failed mosquito tone audibility test means something's wrong." Losing the top few kHz is normal for most adults.
- "It's a new discovery." The limits of human hearing were understood long before any phone alert. A mosquito tone audibility sound test just made them easy to try at home.
The myth that matters most is "what I can't hear can't hurt me." Loud sound can cause hearing damage whether you notice it or not.
Why Low Volume Matters Even When You Hear Nothing
The danger depends on the sound's loudness in decibel terms, not on whether you can hear its pitch. If you turn the volume up hunting for a tone you no longer detect, you push loud sound into your ears with no warning. A silent step at a moderate level is your result.
Frequently Asked Questions
- What is the mosquito tone?
- It's a pure sine wave at about 17,400 Hz. The name comes from the Mosquito anti-loitering device, sold in the UK from 2005, whose tone bothered teenagers but went unnoticed by most adults over 25.
- Is this hearing age test medically accurate?
- No. It's a quick screening on uncalibrated consumer equipment, focused on 8-22 kHz. A clinical audiogram uses calibrated equipment in a sound-treated booth and focuses on the speech range, about 250 Hz to 8 kHz. If you're worried about your hearing, see an audiologist.
- Why can't I hear the tone on my laptop or phone speakers?
- Small built-in speakers and cheap earbuds often roll off steeply above about 14-16 kHz. If the tone disappears on a laptop speaker, you may be measuring the speaker rather than your ears. Wired over-ear or in-ear headphones give a more honest result.
- Do Bluetooth headphones affect the result?
- They can. Codecs such as SBC and AAC may filter out the very top of the range to save bandwidth, which makes your result read older than it is. Use wired headphones when you can.
- Should I test my left and right ears separately?
- Yes, for a cleaner result. Switch from both ears to one side, keep the same low volume and compare your highest clear tone for each ear. If one side is much lower, retest with different headphones, and talk to an audiologist if it matches problems you notice day to day.
- If I can't hear the mosquito tone, is something wrong with my hearing?
- Usually not. Losing the top few kHz is a normal part of aging (presbycusis) and is common after your mid-twenties. Missing tones down around 8 kHz is the result worth getting checked.
- Can a tone I can't hear still damage my hearing?
- Yes. Harm depends on how loud the sound is, not on whether you can hear its pitch. Don't turn the volume up to hunt for a tone. If you hear nothing at a moderate level, that is your result.