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The global loudness of a varying intensity sound is greater when theintensity increases than when it decreases. This global loudness asymmetry wasfound to be larger for pure tones than for broadband noises. In this study, ouraim was to determine whether this difference between pure tones and noises isdue to the difference in bandwidth between sounds or to the difference in thestrength of the sensation of pitch. The loudness asymmetry was measured forbroadband and for narrow-band signals that do or do not elicit a sensation ofpitch. The asymmetry was greater for sounds that elicit a sensation of pitchwhatever their bandwidth. The loudness model for time varying sounds [1]predicted well the asymmetry for the broadband noise that does not elicit asensation of pitch and for a multi-tonal sound. For the other sounds theasymmetry was greater than predicted. It is known that loudness and pitchinteract. The difference in asymmetry between sounds that elicit pitch andsounds that do not elicit pitch might be due to this interaction.

Effect of Pitch on the Asymmetry in Global Loudness Between Rising- and Falling-Intensity Sounds