Auditory brainstem responses to chirps delivered by an insert earphone with equalized frequency response.
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ABSTRACT: Recently it has been demonstrated that auditory brainstem responses, ABRs, to chirps are larger with the ER-2 than with the ER-3A insert earphone due to differences between the corresponding amplitude-frequency responses. Therefore a modified chirp, which equalizes the amplitude-frequency response of the ER-3A, is constructed and subsequently compared to the unmodified chirp. ABRs are recorded from 20 normal-hearing subjects in response to the two chirps delivered by the ER-3A earphone at a wide range of levels. The results confirm that the modified chirp generates significantly larger ABRs than the unmodified chirp at levels below 60 dB nHL.
SUBMITTER: Elberling C
PROVIDER: S-EPMC3411557 | biostudies-other | 2012 Aug
REPOSITORIES: biostudies-other
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