Subject: Re: [AUDITORY] Natural experiment example needed From: Harvey Abrams <hbabrams@xxxxxxxx> Date: Sat, 5 Apr 2025 08:27:04 -0400--000000000000fb3c160632072027 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Wonderful question, Wolfgang. The communication challenges imposed by wearing face masks may provide some useful lessons on the effects of low-pass filtering and the importance of visual cues on speech intelligibility. There are some good papers on this topic; for example, Kim, Y., & Thompson, A. (2022). An Acoustic-Phonetic Approach to Effects of Face Masks on Speech Intelligibility. *Journal of speech, language, and hearing research : JSLHR*, *65*(12), 4679=E2=80=934689. https://doi.org/10.1044/2022_JSLHR-22-00245 Alkharabsheh, A., Aboudi, O., Abdulbaqi, K., & Garadat, S. (2023). The effect of wearing face mask on speech intelligibility in listeners with sensorineural hearing loss and normal hearing sensitivity. *International journal of audiology*, *62*(4), 328=E2=80=93333. https://doi.org/10.1080/14992027.2022.2045366 -Harvey On Sat, Apr 5, 2025 at 3:22=E2=80=AFAM Wolfgang Ellermeier < ellermeier@xxxxxxxx> wrote: > Here's my favourite record of a 'natural experiment' (Derryberry et al., > Science 2020) due to the changes in the acoustical environment produced b= y > COVID (air) traffic measures. I have occasionally used it in teaching: > > https://www.science.org/doi/10.1126/science.abd5777 > > Californian songbirds adapting the acoustics of their songs (level, > spectrum, complexity) to the dramatically changed soundscapes! > > Wolfgang > > Am 04.04.2025 um 19:23 schrieb Huron, David: > > In teaching research methods to music-psychology students, for years I > have illustrated a "natural experiment" by discussing how shutting down a= ir > traffic in the aftermath of 9/11 allowed climate scientists to determine > the effect of aircraft vapor trails on earth's overall temperature. (Do > vapor trails cool the earth by blocking sunlight, or is the net effect to > warm the earth by blocking reflected surface heat from radiating into > space?) > > I'd like to have an updated example, preferably something we learned abou= t > music or hearing arising from Covid isolation -- something students could > better relate to. > > Any suggestions? > > Cheers, > David Huron > > > -- > Prof. Wolfgang Ellermeier, Ph.D. > Institut fuer Psychologie > Technische Universitaet Darmstadt > Alexanderstr. 10 > D - 64283 DARMSTADT, Germany > > phone: ++49-6151-1624103 > phone (secr.): ++49-6151-1624012 > E-mail: ellermeier@xxxxxxxx > http://www.psychologie.tu-darmstadt.de/ellermeier > --000000000000fb3c160632072027 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr">Wonderful question, Wolfgang. The communication challenges= imposed by wearing face masks may provide some useful lessons on the effec= ts of low-pass filtering and the importance of visual cues on speech intell= igibility. There are some good papers on this topic; for example,<div><font= face=3D"arial, sans-serif"><span style=3D"color:rgb(33,33,33)">Kim, Y., &a= mp; Thompson, A. (2022). An Acoustic-Phonetic Approach to Effects of Face M= asks on Speech Intelligibility.=C2=A0</span><i style=3D"box-sizing:inherit;= color:rgb(33,33,33)">Journal of speech, language, and hearing research : JS= LHR</i><span style=3D"color:rgb(33,33,33)">,=C2=A0</span><i style=3D"box-si= zing:inherit;color:rgb(33,33,33)">65</i><span style=3D"color:rgb(33,33,33)"= >(12), 4679=E2=80=934689. <a href=3D"https://doi.org/10.1044/2022_JSLHR-22-= 00245">https://doi.org/10.1044/2022_JSLHR-22-00245</a></span></font></div><= div><font face=3D"arial, sans-serif"><span style=3D"color:rgb(33,33,33)">Al= kharabsheh, A., Aboudi, O., Abdulbaqi, K., & Garadat, S. (2023). The ef= fect of wearing face mask on speech intelligibility in listeners with senso= rineural hearing loss and normal hearing sensitivity.=C2=A0</span><i style= =3D"box-sizing:inherit;color:rgb(33,33,33)">International journal of audiol= ogy</i><span style=3D"color:rgb(33,33,33)">,=C2=A0</span><i style=3D"box-si= zing:inherit;color:rgb(33,33,33)">62</i><span style=3D"color:rgb(33,33,33)"= >(4), 328=E2=80=93333. <a href=3D"https://doi.org/10.1080/14992027.2022.204= 5366">https://doi.org/10.1080/14992027.2022.2045366</a></span></font><font = color=3D"#212121" face=3D"arial, sans-serif"><br></font><div><br></div><div= >-Harvey</div><div><br></div></div></div><br><div class=3D"gmail_quote gmai= l_quote_container"><div dir=3D"ltr" class=3D"gmail_attr">On Sat, Apr 5, 202= 5 at 3:22=E2=80=AFAM Wolfgang Ellermeier <<a href=3D"mailto:ellermeier@xxxxxxxx= sychologie.tu-darmstadt.de">ellermeier@xxxxxxxx</a>> = wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0= px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><u></u> =20 =20 =20 <div> <div>Here's my favourite record of a 'natural experiment' (Derryberry et al., Science 2020) due to= the changes in the acoustical environment produced by COVID (air) traffic measures. I have occasionally used it in teaching:<br> </div> <div><br> </div> <div><a href=3D"https://www.science.org/doi/10.1126/science.abd5777" ta= rget=3D"_blank">https://www.science.org/doi/10.1126/science.abd5777</a></di= v> <div><br> </div> <div>Californian songbirds adapting the acoustics of their songs (level, spectrum, complexity) to the dramatically changed soundscapes!</div> <div><br> </div> <div>Wolfgang<br> </div> <div><br> </div> <div>Am 04.04.2025 um 19:23 schrieb Huron, David:<br> </div> <blockquote type=3D"cite"> =20 =20 <span style=3D"font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontServi= ce,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">In teaching research methods to music-psychology students, for years I have illustrated a "natural experiment" by discus= sing how shutting down air traffic in the aftermath of 9/11 allowed climate scientists to determine the effect of aircraft vapor trails on earth's overall temperature. (Do vapor trails cool th= e earth by blocking sunlight, or is the net effect to warm the earth by blocking reflected surface heat from radiating into space?)</span> <div style=3D"font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontServic= e,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"> <br> </div> <div style=3D"font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontServic= e,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"> I'd like to have an updated example, preferably something we learned about music or hearing arising from Covid isolation -- something students could better relate to.</div> <div style=3D"font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontServic= e,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"> <br> </div> <div style=3D"font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontServic= e,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"> Any suggestions?</div> <div style=3D"font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontServic= e,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"> <br> </div> <div style=3D"font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontServic= e,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"> Cheers,</div> <div style=3D"font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontServic= e,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"> David Huron</div> <div style=3D"font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontServic= e,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"> <br> </div> </blockquote> <p><br> </p> <div>-- <br> Prof. Wolfgang Ellermeier, Ph.D. <br> Institut fuer Psychologie <br> Technische Universitaet Darmstadt <br> Alexanderstr. 10 <br> D - 64283 DARMSTADT, Germany <br> <p> phone: ++49-6151-1624103 <br> phone (secr.): ++49-6151-1624012 <br> E-mail: <a href=3D"mailto:ellermeier@xxxxxxxx" t= arget=3D"_blank">ellermeier@xxxxxxxx</a> <br> <a href=3D"http://www.psychologie.tu-darmstadt.de/ellermeier" targe= t=3D"_blank">http://www.psychologie.tu-darmstadt.de/ellermeier</a><br> </p> </div> </div> </blockquote></div> --000000000000fb3c160632072027--