Convert Mel to Hz
Details
This is a direct re-implementation of the hz_to_mel
function from the librosa library.
The default method is to use the method due to Slaney (1998), which is linear below 1000Hz, and logarithmic above.
If htk=TRUE, the method from HTK, due to O'Shaughnessy (1987) is used.
References
McFee, B., C. Raffel, D. Liang, D. PW Ellis, M. McVicar, E. Battenberg, and O. Nieto. librosa: Audio and music signal analysis in python. In Proceedings of the 14th python in science conference, pp. 18-25.
O'Shaughnessy, D (1987). Speech communication: human and machine. Addison-Wesley. p. 150. ISBN 978-0-201-16520-3.
Slaney, M. (1998) Auditory Toolbox: A MATLAB Toolbox for Auditory Modeling Work. Technical Report, version 2, Interval Research Corporation.
Examples
mel_to_hz(c(7.5, 15, 25, 31))
#> [1] 500.000 1000.000 1988.773 3004.251