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    J Acoust Soc Am. 2010 Jan;127(1):361-9.

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

    Rodríguez J, Neely ST, Patra H, Kopun J, Jesteadt W, Tan H, Gorga MP.

    Source

    Boys Town National Research Hospital, 555 North 30th Street, Omaha, Nebraska 68131, USA. rodríguezj@boystown.org

    Abstract

    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/f(2) 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 L(2) 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.

    PMID:
    20058983
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC2821167
    Free PMC Article

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