Frequency discrimination depends on pitch strength and worsens as pitch strength falls

Evidence

Memories for pitch and loudness have to be included in the process of modelling just-noticeable differences in frequency and amplitude. Therefore, the model for just-noticeable differences has to include models for pitch and loudness. Consequently, it becomes more complicated, although it contains submodels for pitch and loudness that have already been discussed, or will in the next chapter. Figure 7.22 shows the whole model. The incoming sound produces the excitation level versus critical-band rate pattern that is used to produce pitch and pitch strength, and loudness and specific loudness. The corresponding data are transferred to the pitch memory and the loudness memory. These values of the first of the two sounds to be used in measuring just-noticeable differences, are stored and can be compared with the incoming values of the second sound. The just-noticeable difference in frequency depends strongly on pitch strength and increases with decreasing pitch strength. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1163

Memories for pitch and loudness have to be included in the process of modelling just-noticeable differences in frequency and amplitude. Therefore, the model for just-noticeable differences has to include models for pitch and loudness. … The just-noticeable difference in frequency depends strongly on pitch strength and increases with decreasing pitch strength. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1163

Categorization

• DEFINE: Clarifies that a JND model must include pitch and loudness memory submodels, so JND measurement is comparative across two stored sounds.
• corroborated: 2 independent passages support this claim — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1163