Model-computed and measured loudness match across the full level range

Evidence

The reason for this effect, also shown in Fig. 8.7, is the flatter upper slope of the excitation pattern, and consequently also the flatter loudness pattern, towards higher critical-band rates. In this case, not only the peak value of the specific-loudness pattern decreases with increasing bandwidth but also the upper slope, with the result that the area is almost constant, i.e. constant loudness, for bandwidths between critical band and octave band at levels near 100 dB SPL. The loudnesses calculated using the model and those measured psychoacoustically are very close to one another; they both show the invariance of loudness for spectral extension within one critical band and the same dependence on bandwidth beyond the critical band. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1288

Categorization

• XREF: Model-validation result echoes the tone-versus-noise loudness matching theme from earlier chapters on excitation patterns.