An experiment tested the hypothesis that the masking effects of two nonoverlapping forward maskers are summed linearly over time. First, the levels of individual noise maskers required to mask a brief 4-kHz signal presented at 10-, 20-, 30-, or 40-dB sensation level (SL) were found. The hypothesis predicts that a combination of the first masker presented at the level required to mask the 10-dB SL signal and the second masker presented at the level required to mask the 20-dB SL signal, should produce the same amount of masking as the converse situation (i.e., the first masker presented at the level required to mask the 20-dB SL signal and the second masker presented at the level required to mask the 10-dB SL signal), and similarly for the 30- and 40-dB SL signals. The results were consistent with the predictions.
|Original language||English (US)|
|Number of pages||4|
|Journal||Journal of the Acoustical Society of America|
|State||Published - 2007|
Bibliographical noteFunding Information:
The authors thank the Editor and two anonymous reviewers for constructive comments on an earlier version of the manuscript. The work was supported by EPSRC (UK) Grant No. GR/N07219, BBSRC (UK) Grant No. BB/D012953/1, and NIDCD Grant No. R01 DC 03909.