Further progress with loudness adaptation inside and outside the speech range

Abstract

Measurement of loudness adaptation at 4000 Hz and below depends on the technique used [Weiler et al., J. Acoust. Soc. Am. 101, 3171(A) (1997); T. Maguire et al., J. Acoust. Soc. Am. 106, 2207 (1999)]. Further comparison of simple adaptation (SA) to the ipsilateral comparison paradigm (ICP) with repeated measures designs again shows adaptation for both techniques at 8000 Hz but stronger effects for the ICP now. At 6000 Hz only, violations of normal curve parameters were again observed but no SA. Observations at 250 Hz for the ICP and SA will be discussed. The difference in adaptation between the two techniques is extreme in the primary speech frequencies but intermediate at 8000 Hz for our repeated measures designs. Further investigation is planned.