A sound frequency chart organizes vibrations by frequency, measured in hertz (Hz). Human hearing typically extends from about 20 Hz to 20,000 Hz: low frequencies are associated with bass, middle frequencies carry much of speech and musical definition, and high frequencies contribute presence, detail, and brilliance.
These limits are approximate. Age, hearing health, playback level, and equipment affect what you can hear. See the human hearing frequency range for more detail.
Sound Frequency Chart: What Does Each Range Represent?
Frequency describes how many times a sound wave repeats each second. One hertz equals one cycle per second. The bands below are audio conventions rather than fixed scientific divisions, so their boundaries vary.
| Frequency range | Common label | Typical perception or role | Example sources |
|---|---|---|---|
| Below 20 Hz | Infrasound | Usually felt as pressure or vibration rather than heard as a clear tone | Very low machinery vibration, earthquakes |
| 20–60 Hz | Sub-bass | Deep rumble, weight, and physical impact | Pipe-organ fundamentals, synthesized bass, lowest piano notes |
| 60–250 Hz | Bass | Warmth, fullness, and rhythmic power | Bass guitar, kick drum, low vocal fundamentals |
| 250–500 Hz | Low midrange | Body and thickness; excess energy may sound muddy | Lower guitar notes, cello, vocal warmth |
| 500 Hz–2 kHz | Midrange | Much of a sound’s recognizable character and musical definition | Speech, vocals, guitars, piano |
| 2–4 kHz | Upper midrange | Intelligibility, attack, and forwardness | Consonants, guitar pick attack, vocal clarity |
| 4–6 kHz | Presence | Detail and edge; too much may sound harsh | Snare attack, vocal consonants, percussion |
| 6–20 kHz | Treble and brilliance | Brightness, air, sparkle, and fine detail | Cymbals, breath noise, upper harmonics |
| Above 20 kHz | Ultrasound | Beyond the conventional upper limit of human hearing | Medical imaging, ultrasonic sensors |
The examples are not confined to one band. A bass guitar has a low fundamental, but its harmonics extend much higher. A cymbal produces a broad spectrum rather than one isolated frequency.
What Is Sound Frequency?
Sound frequency is the repetition rate of a periodic vibration. Faster repetition produces a higher frequency; slower repetition produces a lower frequency. The relationship between frequency and wavelength also means that high-frequency waves are shorter than low-frequency waves when they travel through the same medium.
How Hertz Measures Vibration Cycles
A 100 Hz tone completes 100 cycles per second, while a 1,000 Hz tone completes 1,000. The abbreviation kHz means kilohertz: 1 kHz equals 1,000 Hz, and 20 kHz equals 20,000 Hz.
How Frequency Differs From Pitch and Loudness
Frequency is a physical measurement; pitch is the listener’s perception of how high or low a sound seems. They are closely related, but they are not interchangeable. The full pitch-versus-frequency comparison explains why context, harmonics, and hearing perception can affect the pitch you experience.
Loudness relates mainly to sound pressure and perception, while amplitude describes wave size. Raising a 440 Hz tone’s volume does not raise its frequency.
What Is the Human Hearing Frequency Range?
A young person with healthy hearing can typically detect frequencies from approximately 20 Hz to 20 kHz under suitable test conditions. OSHA uses this conventional audible range while noting that human sensitivity is not equal at every frequency and that the upper limit generally declines with age.
Why 20 Hz to 20 kHz Is Only an Approximation
Audibility depends on more than frequency. Edge-of-range tones may need a higher level, while ordinary speakers may not reproduce extreme bass or treble accurately.
For that reason, an online sweep cannot diagnose hearing loss. It checks the audio, device, speakers or headphones, room, listening level, and your hearing together.
Why the Midrange Matters So Much
OSHA identifies roughly 500 Hz to 4,000 Hz as important for understanding speech. The head and outer ear naturally amplify around 2–4 kHz, a region carrying many consonant cues.
Voices do not exist only between 500 Hz and 4 kHz. Vocal fundamentals can fall below it, while harmonics and consonants extend higher.
Where Do Voices, Instruments, and Musical Notes Fit?
A pitched musical sound has a fundamental frequency that usually determines its perceived note, plus harmonics at higher frequencies that help create its tone quality. This distinction prevents a common mistake: assigning an entire instrument or voice to only one frequency.
Musical Notes and Reference Frequencies
In twelve-tone equal temperament with A4 tuned to 440 Hz, moving up one octave doubles the frequency and moving down one octave halves it. A4 is 440 Hz, A3 is 220 Hz, and A5 is 880 Hz. You can compare more pitches in the music-note frequency chart.
| Note | Frequency | Approximate wavelength in air |
| A0 | 27.50 Hz | 12.51 m |
| C4 | 261.63 Hz | 1.31 m |
| A4 | 440.00 Hz | 0.78 m |
| C6 | 1,046.50 Hz | 0.33 m |
| C8 | 4,186.01 Hz | 0.082 m |
The wavelengths assume 344 metres per second. The reference for A4 at 440 Hz explains its role as a tuning standard.
Fundamentals, Harmonics, and Timbre
If two instruments play A4, both may share a 440 Hz fundamental while sounding clearly different. Their harmonic balance, attack, decay, resonance, and noise components differ. That overall sonic identity is timbre; the guide to pitch and timbre examines the distinction in more detail.
Myth: every recognizable sound has one frequency. Reality: a pure sine wave can represent one frequency, but most natural sounds distribute energy across many frequencies.
How Are Frequency and Wavelength Connected?
Frequency and wavelength are inversely related: as frequency rises, wavelength becomes shorter. The basic formula is:
wavelength = speed of sound ÷ frequency
Using 344 m/s as an approximate speed of sound in room-temperature air:
- 20 Hz: 344 ÷ 20 = 17.2 m
- 440 Hz: 344 ÷ 440 ≈ 0.78 m
- 1,000 Hz: 344 ÷ 1,000 = 0.344 m
- 20,000 Hz: 344 ÷ 20,000 = 0.0172 m, or 1.72 cm
Air temperature changes the speed of sound slightly, so these results are useful estimates rather than universal constants.
How Should You Read a Frequency Chart?
Read a frequency chart from low frequencies on the left to high frequencies on the right. Many audio graphs use a logarithmic horizontal axis: equal distances represent equal ratios rather than equal additions.
Frequency Response Is Not an Audiogram
A frequency-response chart shows how strongly audio equipment handles different frequencies. An audiogram records a person’s hearing thresholds at selected frequencies. They measure different things.
A chart also cannot tell you whether a sound is safe from frequency alone. Hearing risk depends heavily on sound level and exposure duration. A high-pitched sound is not automatically more dangerous than a low-pitched one, and a low-frequency sound can still reach a harmful level.
Use Ranges as a Map, Not a Set of Walls
Terms such as bass, midrange, presence, and brilliance help people discuss sound, but adjacent bands overlap. Use the chart as a guide, then listen in context. The guide to frequency in music connects these bands to notes, octaves, and tuning.
Frequently Asked Questions
What frequency range can humans hear?
Human hearing is conventionally described as approximately 20 Hz to 20,000 Hz for a young listener with healthy hearing. The actual limits vary with age, hearing health, sound level, background noise, and playback equipment.
Is a higher frequency always louder?
No. Frequency describes cycles per second, while loudness is a perceptual response related largely to sound pressure and hearing sensitivity. Two tones can have different frequencies but similar perceived loudness, or the same frequency at very different loudness levels.
What frequency range contains most human speech?
The region from roughly 500 Hz to 4,000 Hz carries much of the information needed for speech intelligibility. Human voices also contain lower fundamentals and higher harmonics, so the complete speech spectrum is wider than that core clarity range.
What is the difference between frequency and pitch?
Frequency is an objective measurement in hertz, whereas pitch is the perceived highness or lowness of a sound. Frequency strongly influences pitch, but harmonics, listening context, and human perception also play a role.
Which frequencies are human ears most sensitive to?
Human hearing is particularly sensitive in the mid-to-upper-midrange, especially around 2–4 kHz. The outer ear naturally boosts part of this region, and it contains important cues for speech clarity.
Can phone or laptop speakers reproduce the full audible range?
Many built-in speakers cannot reproduce deep bass near 20 Hz or the highest treble at a useful level. Their frequency response also varies by device, so a browser-based hearing or frequency test reflects the speaker and listening environment as well as the listener.
Vincent is a pitch detection and vocal analysis writer at OnlinePitchDetector. He focuses on pitch recognition, vocal frequency analysis, singing tools, and real-time audio testing for singers, musicians, producers, and beginners.