from numpy import arange, array, interp
[docs]
def bark2freq(bark_axis):
"""Frequency conversion from Bark to Hertz
This function does the frequency conversion between bark and hertz.
See reference, coefficients are linearly interpolated from the values given in table 6.1.
Parameters
----------
bark_axis : array_like
Bark frequencies to be converted.
Returns
-------
freq_axis : array_like
Frequencies converted in Hertz.
References
----------
..[ZF] E. Zwicker, H. Fastl: Psychoacoustics. Springer,Berlin, Heidelberg, 1990.
The coefficients are linearly interpolated from the values given in table 6.1.
"""
xp = arange(0, 25, 0.5)
yp = array(
[
0,
50,
100,
150,
200,
250,
300,
350,
400,
450,
510,
570,
630,
700,
770,
840,
920,
1000,
1080,
1170,
1270,
1370,
1480,
1600,
1720,
1850,
2000,
2150,
2320,
2500,
2700,
2900,
3150,
3400,
3700,
4000,
4400,
4800,
5300,
5800,
6400,
7000,
7700,
8500,
9500,
10500,
12000,
13500,
15500,
20000,
]
)
return interp(bark_axis, xp, yp)
