FREQUENCY RESOLVING POWER OF THE HUMANS HEARING

Frequency resolving power (FRP) of the human's hearing was measured us ing the rippled noise as a probe. To examine the ripple discrimination , a phase-reversal test was used: the rippled noise was replaced by th at with the opposite peak and through positions. This switch can be de tected only when rippled structure of the noise spectrum is discrimina ted. The highest ripple density when the switch was detectable was tak en as a FRP measure. Narrow-band rippled spectra were used to measure the FRP within a frequency range of 0.175 to 11 kHz. The highest resol vable ripple density in absolute measure (ripples number per kHz) was about 21/kHz at frequencies below 0.5 kHz and fell down at higher freq uencies. Resolvable ripple density in relative measure (central freque ncy divided by ripple spacing) was about 22 relative units at frequenc ies above 2.8 kHz and fell down al lower frequencies.