MHAOvlFilter::FreqScaleFun Namespace Reference

Transform functions from linear scale in Hz to new frequency scales. More...

Functions
mha_real_t	hz2hz (mha_real_t x)
	Dummy scale transformation Hz to Hz. More...
mha_real_t	hz2khz (mha_real_t x)
mha_real_t	hz2octave (mha_real_t x)
mha_real_t	hz2third_octave (mha_real_t x)
mha_real_t	hz2bark (mha_real_t x)
	Transformation to bark scale. More...
mha_real_t	hz2bark_analytic (mha_real_t)
mha_real_t	hz2erb (mha_real_t)
mha_real_t	hz2erb_glasberg1990 (mha_real_t)
mha_real_t	hz2log (mha_real_t x)
	Third octave frequency scale. More...
mha_real_t	inv_scale (mha_real_t, mha_real_t(*)(mha_real_t))

Detailed Description

Transform functions from linear scale in Hz to new frequency scales.

Function Documentation

hz2hz()

mha_real_t MHAOvlFilter::FreqScaleFun::hz2hz

(

mha_real_t

x

)

Dummy scale transformation Hz to Hz.

This function implements a dummy scale transformation (linear frequency scale).

Parameters

x	Input frequency in Hz

Returns

Frequency in Hz

hz2khz()

mha_real_t MHAOvlFilter::FreqScaleFun::hz2khz

(

mha_real_t

x

)

hz2octave()

mha_real_t MHAOvlFilter::FreqScaleFun::hz2octave

(

mha_real_t

x

)

hz2third_octave()

mha_real_t MHAOvlFilter::FreqScaleFun::hz2third_octave

(

mha_real_t

x

)

hz2bark()

mha_real_t MHAOvlFilter::FreqScaleFun::hz2bark

(

mha_real_t

x

)

Transformation to bark scale.

This function implements a critical band rate (bark) scale.

Parameters

x	Input frequency in Hz

Returns

Critical band rate in Bark

hz2bark_analytic()

mha_real_t MHAOvlFilter::FreqScaleFun::hz2bark_analytic

(

mha_real_t

x

)

hz2erb()

mha_real_t MHAOvlFilter::FreqScaleFun::hz2erb

(

mha_real_t

x

)

hz2erb_glasberg1990()

mha_real_t MHAOvlFilter::FreqScaleFun::hz2erb_glasberg1990

(

mha_real_t

x

)

hz2log()

mha_real_t MHAOvlFilter::FreqScaleFun::hz2log

(

mha_real_t

x

)

Third octave frequency scale.

This function implements a third octave scale. Frequencies below 16 Hz are mapped to 16 Hz.

Parameters

x	Frequency in Hz

Returns

Third octaves relative to 1000 Hz

inv_scale()

mha_real_t MHAOvlFilter::FreqScaleFun::inv_scale	(	mha_real_t	y,
		mha_real_t(*)(mha_real_t)	fun
	)