The role of suppression in psychophysical tone-on-tone masking

Joyce Rodríguez, Stephen T. Neely, Harisadhan Patra, Judy Kopun, Walt Jesteadt, Hongyang Tan, Michael P. Gorga

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


This study tested the hypothesis that suppression contributes to the difference between simultaneous masking (SM) and forward masking (FM). To obtain an alternative estimate of suppression, distortion-product otoacoustic emissions (DPOAEs) were measured in the presence of a suppressor tone. Psychophysical-masking and DPOAE-suppression measurements were made in 22 normal-hearing subjects for a 4000-Hz signal/ f2 and two masker/suppressor frequencies: 2141 and 4281 Hz. Differences between SM and FM at the same masker level were used to provide a psychophysical estimate of suppression. The increase in L2 to maintain a constant output (L d) provided a DPOAE estimate of suppression for a range of suppressor levels. The similarity of the psychophysical and DPOAE estimates for the two masker/suppressor frequencies suggests that the difference in amount of masking between SM and FM is at least partially due to suppression.

Original languageEnglish (US)
Pages (from-to)361-369
Number of pages9
JournalJournal of the Acoustical Society of America
Issue number1
StatePublished - 2010

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics


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