Abstract
Frequency resolving power (FRP) of the human's hearing was measured using the rippled noise as a probe. To examine the ripple discrimination, a phase-reversal test was used: the rippled noise was replaced by that with the opposite peak and through positions. This switch can be detected only when rippled structure of the noise spectrum is discriminated. The highest ripple density when the switch was detectable was taken 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 resolvable ripple density in absolute measure (ripples number per kHz) was about 21/KHz at frequencies below 0.5 kHz and fell down at higher frequencies. Resolvable ripple density in relative measure (central frequency divided by ripple spacing) was about 22 relative units at frequencies above 2.8 kHz and fell down at lower frequencies.
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