METHODOLOGY OF EXPERIMENTAL RESEARCHES OF ACOUSTIC EFFICIENCY OF ANTINOISE EAR-PHONES IN THE FIELD OF LOW FREQUENCIES
The objective estimation of quality of acoustic efficiency of antinoise ear-phones in accordance with GOST Р 12.4.213-99 is spent by means of the simplified method in a frequency range from 63 to 8000 Hz. Necessity of carrying out of similar probes and in the field of lower frequencies is proved, the description of experimental installation for measurement of acoustic efficiency of antinoise ear-phones in a frequency range from 4 to 63 Hz is given.
Keywords: antinoise ear-phones, acoustic efficiency (blanking off ability), medical acoustics, noise level measurement, an infrasound.
