Free Online Hearing Test & Tone Generator

About This Hearing Test & Tone Generator

SoundTools.io Hearing Test & Tone Generator is a free browser-based tool for testing your hearing range, discovering your approximate hearing age, generating audio tones at any frequency, and testing your speakers or headphones. All audio is generated locally in your browser using the Web Audio API — nothing is uploaded or recorded. The tool includes four modes: a Hearing Age Test that estimates your hearing age based on your high-frequency hearing range (takes about 60 seconds), a Frequency Sweep that plays a continuous tone from 20Hz to 20kHz to identify where your hearing cuts off, a Tone Generator that lets you play any frequency from 20Hz to 20,000Hz with sine, square, sawtooth, or triangle waveforms, and a Speaker & Headphone Test with left/right channel checks, bass response tests, and full range verification. It's 100% free — no account, no download, no data collected.

How to Test Your Hearing Online

Testing your hearing with SoundTools.io is quick and easy. First, put on headphones and set your device volume to a comfortable level. Click "Start Hearing Test" and confirm you can hear the calibration tone at 1,000 Hz — if you can't, turn up your volume. The test then plays tones at decreasing frequencies starting from 17,500 Hz. For each tone, click "I Can Hear It" if you hear the tone, or "I Can't Hear It" if you don't. The entire test takes about 60 seconds. When it's complete, you'll see your hearing range and estimated hearing age, along with a downloadable result card you can share with friends. For the most accurate results, always use headphones in a quiet environment.

What Is a Normal Hearing Range by Age?

The human hearing range is typically 20 Hz to 20,000 Hz (20 kHz), but this range narrows naturally with age. Children and teenagers can usually hear frequencies up to 17,000–20,000 Hz. By the mid-20s, most people can no longer hear above 16,000 Hz. The upper limit typically drops to around 14,000 Hz by age 40–49, 12,000 Hz by age 55–60, and 10,000 Hz by age 65–70. This gradual decline in high-frequency hearing is called presbycusis and is a completely normal part of aging. Prolonged exposure to loud music, machinery, or headphones at high volume can accelerate this process.

How Human Hearing Works

Sound travels through the air as pressure waves. When these waves enter the ear canal, they vibrate the eardrum, which transmits the vibrations through three tiny bones in the middle ear to the cochlea in the inner ear. The cochlea is lined with thousands of tiny hair cells that detect different frequencies. Low-frequency sounds (20–200 Hz) are perceived as bass — thunder, bass guitars, and rumbling. Mid-frequency sounds (200–5,000 Hz) cover most of human speech and common instruments. High-frequency sounds (5,000–20,000 Hz) include sibilant consonants like "s" and "f", cymbals, and the shimmer of high harmonics. The hair cells that detect high frequencies are the most delicate and the first to be damaged by aging and noise exposure — which is why we lose high-frequency hearing first.

What Are Waveforms?

A sine wave is a pure tone consisting of a single frequency with no harmonics — it sounds clean and smooth. A square wave contains odd harmonics (3rd, 5th, 7th, etc.) and sounds hollow or buzzy. A sawtooth wave contains all harmonics (both odd and even) and sounds bright or brassy — it's commonly used in electronic music synthesizers. A triangle wave contains odd harmonics like a square wave but at reduced amplitudes, giving it a softer, more muted sound. These different waveforms are the building blocks of all sound and musical synthesis. You can hear the difference between them using the Tone Generator mode above.

Use Cases

Discover Your Hearing Age: Take the 60-second hearing age test to find out if your ears are younger or older than you are. Share your result with friends and see who has the best hearing. The hearing age test is competitive, surprising, and endlessly fun — it's the "Can you hear this?" challenge in a polished package.

Test New Headphones or Speakers: Just bought new audio equipment? Use the speaker test to verify both channels work, check the bass response, and sweep the full frequency range to ensure everything sounds right. Find out if your new headphones can actually produce 20Hz bass or if they drop off at 40Hz.

Tune a Musical Instrument: Generate a reference tone at any frequency to tune your guitar, piano, or any instrument. Quick-access buttons for A4 (440 Hz), C4 (Middle C), and other common reference notes make it fast. The alternative A4 = 432 Hz tuning reference is also available for musicians who prefer it.

Science Class Experiments: Demonstrate sound waves, frequency, wavelength, and human hearing limits. The waveform visualization shows how different waveforms (sine, square, sawtooth, triangle) look and sound. Teachers can use the hearing test to show students how hearing varies across age groups.

Identify Tinnitus Frequency: Use the tone generator to match the frequency of tinnitus ringing. Adjust the slider until the generated tone matches what you hear. This information can help when discussing symptoms with a healthcare provider. Note: this tool is not a medical device.

Challenge Your Friends: The "Can you hear this?" challenge never gets old. Test who in your friend group has the best hearing. The shareable result card makes it easy to compare scores and spark friendly competition.

How SoundTools.io Compares to Other Hearing Tests and Tone Generators

Frequently Asked Questions

How do I test my hearing online for free?
Click "Start Hearing Test" on SoundTools.io. The test plays tones at different frequencies and you indicate whether you can hear each one. In about 60 seconds, you'll get your hearing range and estimated hearing age. Use headphones for the best accuracy.

What is a normal hearing range by age?
Children and teenagers can typically hear up to 17,000–20,000 Hz. By age 25, most people can no longer hear above 16,000 Hz. By age 50, the upper limit typically drops to around 12,000–14,000 Hz. This gradual decline in high-frequency hearing is called presbycusis and is a normal part of aging.

What frequency can humans hear?
The human hearing range is typically 20 Hz to 20,000 Hz (20 kHz). The low end (20–200 Hz) covers bass sounds. The mid range (200–5,000 Hz) covers most speech and music. The high end (5,000–20,000 Hz) covers sibilance, cymbals, and harmonics. Most people lose the highest frequencies as they age.

Is this hearing test medically accurate?
No. This is an approximate test for general awareness and entertainment. Results depend on your device's speakers or headphones, volume settings, and ambient noise. For a medically accurate hearing assessment, visit an audiologist who can perform a proper audiometric test in a controlled environment.

What is the "mosquito tone"?
The mosquito tone is a high-frequency sound (typically around 17,400 Hz) that can be heard by teenagers and young adults but not by most people over 25. It was originally used as a deterrent device in shops. You can test whether you can hear it using our hearing test or tone generator.

How do I use the tone generator?
Select the Tone Generator mode, choose a waveform (sine is the purest sound), set your desired frequency using the slider or by typing a number, adjust the volume, and click Play. The generator produces tones from 20 Hz to 20,000 Hz.

Can I use this to tune a musical instrument?
Yes. Use the tone generator to play a reference tone at the desired frequency. For standard tuning, A4 = 440 Hz. The tool shows which musical note corresponds to the current frequency, making it easy to find the right reference tone.

How do I test my headphones or speakers?
Use the Speaker Test mode. The left/right channel test confirms both channels work and aren't swapped. The bass response test sweeps low frequencies to reveal how low your speakers can go. The full range sweep checks for distortion or dead spots across all frequencies.

Can I match my tinnitus frequency?
Yes. Many tinnitus sufferers use the tone generator to identify the frequency of their tinnitus by adjusting the slider until the generated tone matches the ringing they hear. This information can be useful when discussing symptoms with a doctor or audiologist. Note: this tool is not a medical device.

What is 432 Hz tuning?
432 Hz is an alternative tuning reference where the note A4 is tuned to 432 Hz instead of the standard 440 Hz. Some musicians and listeners prefer it for its warmer sound. You can generate a 432 Hz reference tone using our tone generator to tune your instrument to this alternative standard.

Does this tool work on mobile phones?
Yes! The hearing test, tone generator, frequency sweep, and speaker test all work on iPhones, Android phones, iPads, and all desktop browsers. Just open the page in your mobile browser. On iOS Safari, you may need to tap to begin before audio plays.

Is any data collected during the hearing test?
No. All audio is generated locally in your browser using the Web Audio API. No audio is recorded, no data is uploaded, and no personal information is collected. The tool works entirely offline once the page has loaded.