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Derivation of input-output functions from distortion-product otoacoustic emission level maps
- Source :
- The Journal of the Acoustical Society of America. 147(5)
- Publication Year :
- 2020
-
Abstract
- Distortion-product otoacoustic emissions (DPOAEs) emerge from the cochlea when elicited with two tones of frequencies f1 and f2. DPOAEs mainly consist of two components, a nonlinear-distortion and a coherent-reflection component. Input-output (I/O) functions of DPOAE pressure at the cubic difference frequency, f DP = 2 f 1 − f 2, enable the computation of estimated distortion-product thresholds (EDPTs), offering a noninvasive approach to estimate auditory thresholds. However, wave interference between the DPOAE components and suboptimal stimulus-level pairs reduces the accuracy of EDPTs. Here, the amplitude P of the nonlinear-distortion component is extracted from short-pulse DPOAE time signals. DPOAE level maps representing the growth behavior of P in L 1 , L 2 space are recorded for 21 stimulus-level pairs and 14 frequencies with f 2 = 1 to 14 kHz ( f 2 / f 1 = 1.2) from 20 ears. Reproducing DPOAE growth behavior using a least-squares fit approach enables the derivation of ridge-based I/O functions from model level maps. Objective evaluation criteria assess the fit results and provide EDPTs, which correlate significantly with auditory thresholds (p
- Subjects :
- 0301 basic medicine
Input/output
Acoustics and Ultrasonics
Distortion product
Mathematical analysis
Otoacoustic Emissions, Spontaneous
Otoacoustic emission
Auditory Threshold
Cochlea
03 medical and health sciences
030104 developmental biology
0302 clinical medicine
Amplitude
Arts and Humanities (miscellaneous)
Acoustic Stimulation
Objective evaluation
Auditory thresholds
030217 neurology & neurosurgery
Algorithms
Mathematics
Subjects
Details
- ISSN :
- 15208524
- Volume :
- 147
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- The Journal of the Acoustical Society of America
- Accession number :
- edsair.doi.dedup.....7d4e46661f6c3d470fd9cd9b0deb2290