Separate compression channels for peak and valley reduce spectral contrast
Evidence
Plomp (1988) proposed that the number of channels would interact with the compression imposed on those channels, with a consequence of smoothing the peaks and valleys in a sound spectrum. He argued that if a different compression channel processed a spectral peak and a spectral valley, the relationship between their output levels would be altered from the original relationship. On the other hand, if the same channel processed the peak and valley, the peak and valley would undergo the same amount of amplification. This would preserve the spectral contrast in the stimulus. — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1727
Categorization
Category: Causal Relationships
- XREF: Spectral-contrast reduction connects to formant perception and frequency selectivity (critical bands) covered in Chapter 3.
Related
- Processing spectral peaks and valleys in separate compression channels erases their level difference (similarity 0.93)
- Impaired frequency selectivity and lost suppression increase masking and reduce spectral contrasts (similarity 0.80)
- Spectral contrast coding can be enhanced by attenuating valleys while leaving peaks fixed (similarity 0.80)
- More compression channels reduce spectral contrast and vowel recognition (similarity 0.79)
- Inhibitory networks that sharpen spectral peaks can aid listeners with reduced frequency selectivity (similarity 0.78)