Subject: Re: [AUDITORY] Ifrasubs ruin hearing protection use cases From: Torsten <000002e9c2e1b975-dmarc-request@xxxxxxxx> Date: Sat, 23 Mar 2024 12:00:54 +0000<html><body><div dir=3D"auto"><p class=3D"MsoNormal" style=3D"font-style: n= ormal; font-variant-ligatures: normal; font-variant-caps: normal; font-weig= ht: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent= : 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-str= oke-width: 0px; white-space: normal; text-decoration-thickness: initial; te= xt-decoration-style: initial; text-decoration-color: initial; margin: 0cm 0= cm 8pt; line-height: 17.1013px; font-size: 11pt; font-family: Aptos, sans-s= erif; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">Hi Matt,<= /p><p class=3D"MsoNormal" style=3D"font-style: normal; font-variant-ligatur= es: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: no= rmal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none= ; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space= : normal; text-decoration-thickness: initial; text-decoration-style: initia= l; text-decoration-color: initial; margin: 0cm 0cm 8pt; line-height: 17.101= 3px; font-size: 11pt; font-family: Aptos, sans-serif; color: rgb(0, 0, 0); = background-color: rgb(255, 255, 255);">Our study, =E2=80=9CThe Spectral Ext= ent of Phasic Suppression of Loudness and Distortion=E2=80= =91Product Otoacoustic Emissions by Infrasound and Low=E2=80=91Fr= equency Tones=E2=80=9D (<a href=3D"https://link.springer.com/article/10.100= 7/s10162-021-00830-2" style=3D"color: rgb(0, 120, 212);" rel=3D"noreferrer = noopener">https://link.springer.com/article/10.1007/s10162-021-00830-2</a>)= , might explain your problem. We show that the suppressive effect towards t= he high-frequency basal end of the cochlear is much shallower (2-3 dB/octav= e) than predicted from the longitudinal basilar membrane displacement patte= rn.<span> <span> </span></span>We believe that the strong electri= cal potentials, generated by the apical OHCs in response to infrasound (Sal= t et al., 2013,<span> </span><span class=3D"MsoHyperlink" style=3D"tex= t-decoration: underline; color: rgb(70, 120, 134);"><a href=3D"https://doi.= org/10.1121/1.4789005" style=3D"color: rgb(0, 120, 212);" rel=3D"noreferrer= noopener">https://doi.org/10.1121/1.4789005</a>)</span>, are underlying th= e suppression. These fields have a low spatial decay in the highly conducti= ve fluids and have the potential modulate loudness up to<span> </span>= <span class=3D"GramE">fairly high</span><span> </span>frequencies.</p>= <p class=3D"MsoNormal" style=3D"font-style: normal; font-variant-ligatures:= normal; font-variant-caps: normal; font-weight: 400; letter-spacing: norma= l; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; w= idows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: n= ormal; text-decoration-thickness: initial; text-decoration-style: initial; = text-decoration-color: initial; margin: 0cm 0cm 8pt; line-height: 17.1013px= ; font-size: 11pt; font-family: Aptos, sans-serif; color: rgb(0, 0, 0); bac= kground-color: rgb(255, 255, 255);">Unfortunately, I cannot think of = practical ways to solve your problem either. </p><p class=3D"MsoNormal= " style=3D"font-style: normal; font-variant-ligatures: normal; font-variant= -caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-a= lign: start; text-indent: 0px; text-transform: none; widows: 2; word-spacin= g: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoratio= n-thickness: initial; text-decoration-style: initial; text-decoration-color= : initial; margin: 0cm 0cm 8pt; line-height: 17.1013px; font-size: 11pt; fo= nt-family: Aptos, sans-serif; color: rgb(0, 0, 0); background-color: rgb(25= 5, 255, 255);">Best regards,<br>Torsten.</p></div></body></html>=