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Hz to Mel

Source: R/transforms.R
hz_to_mel.Rd

Convert Hz to Mel

Usage

hz_to_mel(hz, htk = FALSE)

Arguments

hz

Numeric values in Hz

htk

Whether or not to use the HTK formula

Value

A numeric vector of Mel values

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

hz_to_mel(c(500, 1000, 2000, 3000))
#> [1]  7.50000 15.00000 25.08188 30.97940