TY - GEN
T1 - Interpeak characterizations for spontaneous otoacoustic emissions
AU - Bergevin, Christopher
AU - Whiley, Rebecca
AU - Wit, Hero
AU - van Dijk, Pim
N1 - Publisher Copyright:
© 2024 American Institute of Physics Inc.. All rights reserved.
PY - 2024/2/27
Y1 - 2024/2/27
N2 - One manifestation of the “active ear" is the presence of spontaneous otoacoustic emission (SOAE), which also exhibit salient connections to perception such as threshold microstructure. Historically, SOAE modeling efforts initially focused upon a single limit-cycle oscillator. However, SOAE spectra from a given ear typically exhibit multiple peaks, and more current models consider a spatially distributed tonotopic system with various types of coupling. SOAEs have nonstationary properties (e.g., amplitude and frequency modulations), which may be crucially tied to the coupling of active elements in the ear. Thus, to better biophysically constrain models, this study seeks to improve characterization of general non-stationary features of SOAE peaks as well as interrelations of such between them. Given the ubiquitous nature of SOAE across the animal kingdom, we analyze SOAE waveforms from a variety of species exhibiting disparate inner ear morphologies (e.g., human, barn owls, Anolis lizards). This manuscript provides a preliminary account of our analyses and focuses on the Anolis lizard. Upon filtering in the spectral domain, we characterize temporal properties of individual peaks, including possible amplitude-modulation (AM) and frequency-modulation (FM). Further, we perform correlation analyses of such between peaks to determine types of interactions and how such might vary across time. Initial results are consistent with previous reports (e.g., [1, 2]) in that an SOAE interpeak correlations for a given ear are idiosyncratic: Sometimes peaks (adjacent or not) exhibit correlated (positive or negative) AM and/or FM fluctuations with delays up to the order of milliseconds (typically longer for humans, shorter for lizards), while sometimes no correlation is observed. We attempt to frame these results within the broader context of specific SOAE modeling approaches.
AB - One manifestation of the “active ear" is the presence of spontaneous otoacoustic emission (SOAE), which also exhibit salient connections to perception such as threshold microstructure. Historically, SOAE modeling efforts initially focused upon a single limit-cycle oscillator. However, SOAE spectra from a given ear typically exhibit multiple peaks, and more current models consider a spatially distributed tonotopic system with various types of coupling. SOAEs have nonstationary properties (e.g., amplitude and frequency modulations), which may be crucially tied to the coupling of active elements in the ear. Thus, to better biophysically constrain models, this study seeks to improve characterization of general non-stationary features of SOAE peaks as well as interrelations of such between them. Given the ubiquitous nature of SOAE across the animal kingdom, we analyze SOAE waveforms from a variety of species exhibiting disparate inner ear morphologies (e.g., human, barn owls, Anolis lizards). This manuscript provides a preliminary account of our analyses and focuses on the Anolis lizard. Upon filtering in the spectral domain, we characterize temporal properties of individual peaks, including possible amplitude-modulation (AM) and frequency-modulation (FM). Further, we perform correlation analyses of such between peaks to determine types of interactions and how such might vary across time. Initial results are consistent with previous reports (e.g., [1, 2]) in that an SOAE interpeak correlations for a given ear are idiosyncratic: Sometimes peaks (adjacent or not) exhibit correlated (positive or negative) AM and/or FM fluctuations with delays up to the order of milliseconds (typically longer for humans, shorter for lizards), while sometimes no correlation is observed. We attempt to frame these results within the broader context of specific SOAE modeling approaches.
UR - http://www.scopus.com/inward/record.url?scp=85187565635&partnerID=8YFLogxK
U2 - 10.1063/5.0189385
DO - 10.1063/5.0189385
M3 - Conference contribution
AN - SCOPUS:85187565635
VL - 3062
T3 - AIP Conference Proceedings
BT - AIP Conference Proceedings
A2 - Dong, Wei
A2 - Epp, Bastian
PB - American Institute of Physics
T2 - 14th International Mechanics of Hearing Workshop, MOH 2022
Y2 - 24 July 2022 through 29 July 2022
ER -