Main Content


Convert from mel scale to hertz



hz = mel2hz(mel) converts values on the mel frequency scale to values in hertz.


collapse all

Set two bounding frequencies in Hz and then convert them to the mel scale.

b = hz2mel([20,8000]);

Generate a row vector of 32 values uniformly spaced on the mel scale.

melVect = linspace(b(1),b(2),32);

Convert the row vector of values into equivalent frequencies in Hz.

hzVect = mel2hz(melVect);

Plot the two vectors for comparison. As mel values increase linearly, Hz values increase exponentially.

title('Mel vs Hz')
grid on

Figure contains an axes object. The axes object with title Mel vs Hz contains an object of type line.

Input Arguments

collapse all

Input frequency on the mel scale, specified as a scalar, vector, matrix, or multidimensional array.

Data Types: single | double

Output Arguments

collapse all

Output frequency in Hz, returned as a scalar, vector, matrix, or multidimensional array the same size as mel.

Data Types: single | double


The frequency conversion from the mel scale to Hz uses the following formula:



[1] O'Shaghnessy, Douglas. Speech Communication: Human and Machine. Reading, MA: Addison-Wesley Publishing Company, 1987.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Introduced in R2019a