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A study of the effectiveness of a novel middle-ear microphone for a cochlear implant, which required an incus recess for the microphone balltip, provided an opportunity to compare methods and inform a feasibility study of the microphone with patients.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>We used laser Doppler vibrometry with an insert earphone and probe microphone in 23 ears from 14 fresh-frozen cadavers to measure the equivalent noise level at the tympanic membrane that would have led to the same stapes velocity as the creation of the incus recess.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Drilling on the incus with a diamond burr created peak noise levels equivalent to 125.1\u2013155.0\u00a0dB SPL at the tympanic membrane, whilst using the laser generated equivalent noise levels barely above the baseline level. The change in middle ear transfer function following drilling showed greater variability at high frequencies, but the change was not statistically significant in the three frequency bands tested.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>Whilst drilling resulted in substantially higher equivalent noise, we considered that the recess created by laser ablation was more likely to lead to movement of the microphone balltip, and therefore decrease performance or result in malfunction over time. For patients with greatly reduced residual hearing, the greater consistency from drilling the incus recess may outweigh the potential benefits of hearing preservation with laser ablation.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00405-022-07532-2","type":"journal-article","created":{"date-parts":[[2022,7,14]],"date-time":"2022-07-14T11:03:35Z","timestamp":1657796615000},"page":"661-669","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Creation of an incus recess for a middle-ear microphone using a drill or laser ablation: a comparison of equivalent noise level and middle ear transfer function"],"prefix":"10.1007","volume":"280","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5656-6009","authenticated-orcid":false,"given":"Robert P.","family":"Morse","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1068-0869","authenticated-orcid":false,"given":"Alistair","family":"Mitchell-Innes","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0586-5324","authenticated-orcid":false,"given":"Andreas N.","family":"Prokopiou","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0013-719X","authenticated-orcid":false,"given":"Richard M.","family":"Irving","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6175-7168","authenticated-orcid":false,"given":"Philip A.","family":"Begg","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2022,7,14]]},"reference":[{"key":"7532_CR1","doi-asserted-by":"publisher","first-page":"81","DOI":"10.3109\/00016487509121304","volume":"80","author":"O Hall\u00e9n","year":"1975","unstructured":"Hall\u00e9n O, Tjellstr\u00f6m A (1975) The use of the drill in ear surgery. 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