Online Tone Generator

Hz

About the Online Tone Generator

This online tone generator plays a tone when the "Start" button is clicked. You can change the frequency of the tone by moving the slider or entering your desired frequency into the text box above. Humans can typically hear sounds in the 20 Hz to 20 kHz range, although adults tend to lose their ability to hear sounds past 15 kHz. Babies can actually hear frequencies that are slightly higher than 20 kHz.1.

Other animals have a wider range of hearing. Dogs for example can hear from 67 to 45,000 Hz and cats can hear from 45 to 64,000 Hz. Beluga whales have some of the best hearing and can hear frequencies up to 123,000 Hz.2

How to Use the Tone Generator

Using the tone generator is easy. Move the slider above to the desired frequency of sound or enter a frequency into the text box. Pick a wave type and then click "Start" to play the tone. Click the "Stop" button to stop the tone. Download a sample file of the tone by clicking "Save Tone."

You can select from the following wave types:

  • Sine Wave: Smooth, periodic oscillation. Contains only the fundamental frequency, without harmonics.
  • Square Wave: Abrupt transitions between maximum and minimum amplitude. Contains the fundamental frequency and odd harmonics, producing a richer sound.
  • Triangle Wave: Linear change between maximum and minimum values. Contains only odd harmonics, resulting in a softer sound than the square wave.
  • Sawtooth Wave: Rises or falls linearly, then abruptly shifts. Contains both even and odd harmonics, giving it a bright, harsh sound.
442 Hz >> << 438 Hz

Common Instrument Tuners

Below are some common tuner tones for various instruments.

Violin Tuner

A violin’s strings are tuned a fifth apart with the frequencies of E5 (659.25 Hz), A4 (440.00 Hz), D4 (293.66 Hz), and G3 (196.00 Hz).

StringFrequency
E String(E5, e”, 659.25 Hz.)
A String(A4, a’, 440.00 Hz.)
D String(D4, d’, 293.66 Hz.)
G String(G3, g, 196.00 Hz.)

Viola Tuner

A viola’s strings are tuned a fifth apart with the frequencies of A4 (220 Hz), D4 (293.66 Hz), G3 (196.00 Hz), and C3 (130.8 Hz)

StringFrequency
A String(A4, a’, 440.00 Hz.)
D String(D4, d’, 293.66 Hz.)
G String(G3, g, 196.00 Hz.)
C String(C3, c, 130.8 Hz.)

Cello Tuner

A cello’s strings are tuned a fifth apart with the frequencies of A3 (220 Hz), D3 (146.8 Hz), G2 (98 Hz), and C2 (65.4 Hz).

StringFrequency
A StringA3 (220 Hz)
D StringD3 (146.8 Hz)
G StringG2 (98 Hz)
C StringC2 (65.4 Hz)