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Implemented Model for Masking Threshold


To produce the masking threshold from the spread function and the masker, we need to know the tonality t(z) and the spreading function SF(z) of the masker. After an idea taken MPEG-1 layer I [6], the following model for masking threshold M(z) is used:


where tex2html_wrap_inline1032 is the frequency in Bark for the masker, z is the masked frequency in Bark and tex2html_wrap_inline1036 is the power of the masker in dB. The functions k(t) and l(t) are experimentally found as a linear combinations of constants for pure noise and pure tones:



Bosse Lincoln
Sat Mar 7 16:27:43 PST 1998