Convert pitch between Hz, Barks, and music notation
If more than one box has a valid entry, the first one is used.
The frequency of a pitch in Hertz (Hz) is the number of cycles per second. For example, an A 400 has a pitch of 400 Hz, 400 vibrations per second.
The Bark scale is a psychoacoustic measure of frequency, dividing the audible range into 24 bands that are equal in a physiological sense having to do with the human hearing system. The unit "Bark" was named in honor of acoustician Heinrich Barkhausen.
There are several slightly different ways to convert between frequency in Hz and Barks. This page uses
z = 6 arcsinh(f/600)
to convert frequency f in Hz to critical band rate z in Barks.
The inverse formula is
f = 600 sinh(z/6).
This page uses so-called scientific pitch notation. The C near the lower threshold of hearing is denoted C0. The C one octave higher is C1. The C two octaves above C0 is C2, etc. Middle C is C4.
Notes besides C's take their octave number from the nearest C below. For example, the lowest note on a standard piano is A0, the A above C0. More details here.
In the form above use 'b' (the second letter of the English alphabet) for flat symbol ♭. So, for example, Eb4 is the E-flat above middle C.