The inner ear encodes sound intensity through auditory nerve firing rates.
The inner ear encodes sound intensity primarily through the firing rates and progressive recruitment of auditory nerve fibers.
The retrieved papers provide robust auditory physiology evidence confirming that sound intensity and sound-level coding are represented by auditory nerve fiber firing rates, spike adaptation, and fiber recruitment.
Jingjing Sherry Wu, Eunyoung Yi, Marco Manca, Hamad Javaid, Amanda M. Lauer, E. Glowatzki. Sound exposure dynamically induces dopamine synthesis in cholinergic LOC efferents for feedback to auditory nerve fibers. 2020. https://doi.org/10.7554/eLife.52419
Paper [1] discusses how sound exposure modulates auditory nerve fiber activity and demonstrates that neurotransmitters down-regulate auditory nerve firing rates in response to acoustic stimuli.
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A. Huet, Charlène Batrel, Xavier Dubernard, J. Kleiber, G. Desmadryl, F. Venail, M. Liberman, R. Nouvian, J. Puel, J. Bourien. Peristimulus Time Responses Predict Adaptation and Spontaneous Firing of Auditory-Nerve Fibers: From Rodents Data to Humans. 2022. https://doi.org/10.1523/JNEUROSCI.0858-21.2022
Paper [2] notes that sound-level coding in the auditory nerve is achieved through the progressive recruitment and firing rate modulation of auditory nerve fibers.
Jacques A. Grange, Mengchao 梦超 Zhang 张, J. Culling. The Role of Efferent Reflexes in the Efficient Encoding of Speech by the Auditory Nerve. 2022. https://doi.org/10.1523/JNEUROSCI.2220-21.2022
Paper [4] examines rate-level functions and how the auditory nerve encodes sound intensity through fiber firing rates and dynamic range adaptation.
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