Frequency just-noticeable differences rise sharply at low sensation levels

Evidence

Just-noticeable differences in frequency are level dependent only below sensation levels of about 25 dB. Below this value, the just-noticeable difference rises with decreasing level so that the just-noticeable difference in frequency is about 5 times larger at a sensation level of 5 dB than at 25 dB. The data discussed so far correspond to durations greater than 200 ms for the two tone bursts to be compared. This corresponds to quasi-steadystate condition. For burst durations shorter than 200 ms, the just-noticeable frequency difference increases. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1071

Categorization

• corroborated: 2 independent passages support this claim — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1071