[Audiometry in critical frequency bands of hearing]

The analysis of the choice and distribution of the fixed frequencies in the course of audiometry and mechanisms of automatic regulation in the hearing system (HS) gave grounds to suppose that: 1) HS is rather a multichannel system than a single channel, the number of channels being equal to the number of frequency critical acoustic bands (that is 24); 2) not one but 24 mechanisms of threshold hearing adaptation operate in HS, one for each critical hearing band; 3) the number of fixed frequencies at which audiometry is made (125 Hz-8 kHz) should be 21 while now it is 9 and these frequencies should not change by ostave, but must correspond to central frequencies of critical hearing bands this number of frequencies being optimal.