[The mapping of the masking effect of noise in relation to the adaptive potentials of the auditory analyzer for speech communication].

Abstract

The work considers the problem of ergonomic evaluation on the abilities of the auditory analyzer for speech information processing, depending on the zones of masking effect of noise and the rate of speech communication. Significant increase the loss of speech communication with increase in the intensity of the masking effect of noise (from 21.33% at L eq. 40 dB to 96% at L eq. 90 and above 90 dB/A). The speech communication is determined on scale in 4 zones, depending on the qualitative-quantitative criteria of the speech communication processing [I, II, III and IV zones]. Of point of view of ensuring the necessary conditions for perception of the speech communication is confirmed the correctness of the norm for masking noise L eq. 65 dB/A/, which guarantees a good speech communication. Equivalent levels of the masking noise about or equal to L eq. dB/A/ guarantee a satisfactory speech communication in the command desks. When the intensities of the masking noise are above the norms they are of specific importance, as they fall into the unaccepted (bad) zone, of the auditory perception of speech communication.