Uniform masking noise mirrors white-noise masking and gives flat thresholds

Evidence

For some measurements, a masked threshold independent of frequency over the entire audible frequency range is required. Such a masking curve can be produced by a special noise with a density level that depends on frequency. Such a noise represents a mirror image of the frequency dependence of the masked threshold for white noise. The attenuation of a network, which has to be put in series with a white-noise generator to produce such a uniform masking noise, is shown in the upper panel of Fig. 4.2. The resulting noise is called uniform masking noise, because it produces - as shown in the lower … — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 408

Categorization

• DEFINE: Defines uniform masking noise as the frequency-shaped inverse of white-noise masking used to produce a flat masked threshold.