Convert between frequency in Hz and in mel units

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Description

Convert between frequency in Hz and in psychoacoustic mel units.

Usage

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f2mel( hz )
mel2f( mel )

Arguments

hz

a frequency in Hertz (cycles per second).

mel

a frequency in mel units.

Details

These functions convert between the linear Hertz and psychoacoustic Mel scales. The functions use formulas provided by Rietveld & Van Heuven (2009).

A frequency of 1000 Hz equals 1000 mel. For frequencies below 1000 Hz the mel scale is approximately linear; for frequencies above 1000 Hz the mel scale is approximately logarithmic.

Value

Transformed value(s) in mel or hertz units.

References

Rietveld, A. C. M., & Van Heuven, V. J. (2009). Algemene Fonetiek (3rd ed.). Bussum: Coutinho.

See Also

f2st, st2f, f2bark, bark2f.

Examples

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f2mel( seq( 250, 1000, by= 250) )
f2mel( seq(1000, 3000, by=1000) )
mel2f( seq( 500, 2500, by= 500) )