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A classic problem of cochlear biophysics is that the <jats:italic>RC<\/jats:italic> (resistance-capacitance) time constant of the hair-cell membrane appears inconveniently long, producing an effective cut-off frequency much lower than that of most audible sounds. The long <jats:italic>RC<\/jats:italic> time constant implies that the OHC receptor potential\u2014and hence its electromotile response\u2014decreases by roughly two orders of magnitude over the frequency range of mammalian hearing, casting doubt on the hypothesized role of cycle-by-cycle OHC-based amplification in mammalian hearing. Here, we review published data and basic physics to show that the \u201c<jats:italic>RC<\/jats:italic> problem\u201d has been magnified by viewing it through the wrong lens. Our analysis finds no appreciable mismatch between the expected magnitude of high-frequency electromotility and the sound-evoked displacements of the organ of Corti. Rather than precluding significant OHC-based boosts to auditory sensitivity, the long <jats:italic>RC<\/jats:italic> time constant appears beneficial for hearing, reducing the effects of internal noise and distortion while increasing the fidelity of cochlear amplification.<\/jats:p>","DOI":"10.1007\/s10162-022-00884-w","type":"journal-article","created":{"date-parts":[[2023,2,1]],"date-time":"2023-02-01T21:33:38Z","timestamp":1675287218000},"page":"129-145","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["The Long Outer-Hair-Cell RC Time Constant: A Feature, Not a Bug, of the Mammalian Cochlea"],"prefix":"10.1007","volume":"24","author":[{"given":"Alessandro","family":"Alto\u00e8","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5939-2710","authenticated-orcid":false,"given":"Christopher A.","family":"Shera","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2023,2,1]]},"reference":[{"key":"884_CR1","doi-asserted-by":"publisher","first-page":"1497","DOI":"10.1121\/1.428436","volume":"107","author":"E de Boer","year":"2000","unstructured":"de Boer E, Nuttall AL (2000) The mechanical waveform of the basilar membrane. 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