11.50 remote masking; downward masking. Phenomenon in which an intense band of noise raises the threshold of hearing for sounds lower in frequency than that of the...
11.47 central masking. Masking that occurs when a signal is presented to one ear and a masking sound to the other ear. Annotation The site of central masking is thought to be in...
11.46 speech interference level. One-fourth of the arithmetic sum of the band sound pressure levels for octave bands with nominal midband frequencies of 500, 1000, 2000, and 4000 Hz. Unit, decibel; abbreviation, SIL; symbol,...
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