METHOD OF PHISIOLOGICAL, BIO- AND PSYCHOPHYSICAL FOUNDATION AND DETERMINATION OF MAXIMUM ALLOWED DOSES OF SOUND IMPACT, MAXIMUM ALLOWED SOUND PRESSURES, MAXIMUM ALLOWED LEVELS OF SOUND PRESSURES, MAXIMUM ALLOWED LEVELS OF SOUND PRESSURES AND SANITARY STANDARDS OF EXPOSITION OF PEOPLE IN SOUND FIELD WITH STANDARD FREQUENCY 1000HZ

摘要

FIELD: medicine.;SUBSTANCE: invention relates to bordering areas of science, technology and manufacturing, namely to hearing physiology and otolaryngology, human hygiene, ecology of noise plants, sound dosimetry and metrology of sound parametres. Total number Z of auditory receptors -exterior and interior Corti's cochlear hair cells (CC), able at standard sound frequency f_s = 1000 Hz to create sensation of tones with loudness E, daphone = L, bel, corresponding to sound pressure p(L) at level L at hearing threshold p_o = 2·10^-5Pa, Z = N_e + N_i where N_e = 15 exterior CC and N_i = 1interior CC. Determined are connection between level L of sound pressure p(L) and number n of functioning exterior CC reacting on sound pressure of said level: L = n - 1, and connections of these values with sound pressure in internal ear g(L, n) = g(L), and dose of sound impact D(L) = g(L)²τ during time τ, which do not cause destruction of exterior CC. For hearing analyser determined is maximal number n_s of exterior CC located in exterior row of cochlear duct and responsible for perception of sound pressure with level L_s, at which they are able tolerantly, without destruction, to function permanently and without adaptation: n_s = 6 of exterior CC, and level of sound pressure: L_s = 5 B, which corresponds to sound loudness E_s = 5 daphone = 50 phone. Reference points in hearing physiology for n_s = 6 of exterior CC and sound pressure level L_s = 5 B = 50 dB are calculated: for maximal sound pressure in internal ear g(L_s, n_s) = 2.156·10^-4 Pa, for maximal dose of sound impact in internal ear with impact duration T = 360 years, on which work of ear is intended, D(L_s) = 0.147 Pa²hour.;EFFECT: method allows to determine maximal permissible parametres of sound impact on people in sound field 1000 Hz taking into account physiological, bio- and psychophysical foundation.;3 cl, 12 dwg