Abstract
OBJECTIVE: Otoacoustic emissions and the speech-evoked auditory brainstem
response are objective indices of peripheral auditory physiology
that are used clinically for assessing hearing function. While each
measure has been extensively explored, their interdependence and
the relationships between them remain relatively unexplored. METHODS:
Distortion product otoacoustic emissions (DPOAEs) and speech-evoked
auditory brainstem responses (sABRs) were recorded from 28 normal-hearing
adults. Through correlational analyses, DPOAE characteristics were
compared to measures of sABR timing and frequency encoding. Data
were organized into two DPOAE (Strength and Structure) and five brainstem
(Onset, Spectrotemporal, Harmonics, Envelope Boundary, and Pitch)
composite measures. RESULTS: DPOAE Strength shows significant relationships
with sABR Spectrotemporal and Harmonics measures. DPOAE Structure
shows significant relationships with sABR Envelope Boundary. Neither
DPOAE Strength nor Structure is related to sABR Pitch. CONCLUSIONS:
The results of the present study show that certain aspects of the
speech-evoked auditory brainstem responses are related to, or covary
with, cochlear function as measured by distortion product otoacoustic
emissions. SIGNIFICANCE: These results form a foundation for future
work in clinical populations. Analyzing cochlear and brainstem function
in parallel in different clinical populations will provide a more
sensitive clinical battery for identifying the locus of different
disorders (e.g., language based learning impairments, hearing impairment).
- acoustic
- adult
- anatomy
- histology,auditory
- histology,brain
- mapping,brain
- mapping:
- methods,auditory,auditory
- methods,brain
- methods,evoked
- pathways,auditory
- pathways:
- perception,auditory
- perception,speech
- perception:
- physiology,auditory
- physiology,brain
- physiology,cochlea,cochlea:
- physiology,computer-assisted,electrodes,electroencephalography,electroencephalography:
- physiology,young
- potentials,female,humans,male,signal
- processing,speech
- stem,brain
- stem:
- stimulation,adult,audiometry,audiometry:
- \&
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