Re: Reference for typical SNRs is public spaces (Karolina Smeds )


Subject: Re: Reference for typical SNRs is public spaces
From:    Karolina Smeds  <karolina.smeds@xxxxxxxx>
Date:    Thu, 23 Jan 2014 08:00:47 +0000
List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>

--_000_4e586f66907742869be062f0e9bed1cbDB3PR03MB298eurprd03pro_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Dear Andy, There is, as you describe, a lack of information regarding SNRs in various = realistic listening environments. The reference that has been used for deca= des is the work of Pearsons et al. (Pearsons KS, Bennett RL, Fidell S. (197= 7) Speech levels in various noise environments. Project report on contract = 68 01-2466., U.S. Environmental Protection Agency, Washington, DC.). The ma= in results have been summarized in a paper by Olsen (Olsen WO. (1998) Avera= ge speech levels and spectra in various speaking/listening conditions: A su= mmary of the Pearson, Bennett, & Fidell (1977) report Am J of Audiol 7: 1-5= .). But, in these recordings there aren't any recordings in bars or restaur= ants. There is a study by Teder (Teder H. (1990) Noise and speech levels in noisy= environments. Hear Instrum 41: 32-33.), where there are recordings of the = type you ask for. We have recently submitted a manuscript for publication where we have inves= tigated the SNRs found in everyday recordings made by 20 hearing-aid users = (Smeds, Wolters, and Rung). The data is a further analysis of the data coll= ected by Wagener et al. (Wagener KC, Hansen M, Ludvigsen C. (2008) Recordin= g and classification of the acoustic environment of hearing aid users. J Am= Acad Audiol 19: 348-70). The "signal" in our analyses is always live speec= h. I'm happy to send you a copy of a poster we have presented on this mater= ial if you contact me directly. However, from your question it sounds as if you're mainly interested in "di= fficult situations" with low SNRs. Since the recordings we analyzed were ma= de in the informants' everyday life and recordings were only made for a 3-4= days, there were not that many recordings made in this type of very noisy = situations. There might also be a bias created by the fact that the informa= nts were hearing-aid users, who might find it particularly difficult in the= se noisy situations and might therefore refrain from going to noisy bars an= d similar. There might also be a bias created by the fact that the persons = talking to the informants took the hearing loss into account and raised the= ir vocal effort or decreased the speaking distance, thereby creating slight= ly higher SNRs than would otherwise be the case. But, the poster is available if you're interested. Cheers, Karolina Smeds, Director PhD ORCA Europe, Widex A/S Maria Bangata 4 SE-118 63 STOCKHOLM Sweden +46 8 455 67 60 (phone) +46 8 455 67 63 (phone, direct) +46 706 92 38 02 (mobile) +46 8 668 04 50 (fax) karolina.smeds@xxxxxxxx www.orca-eu.info From: AUDITORY - Research in Auditory Perception [mailto:AUDITORY@xxxxxxxx= ILL.CA] On Behalf Of Andy Sabin Sent: den 22 januari 2014 18:53 To: AUDITORY@xxxxxxxx Subject: [AUDITORY] Reference for typical SNRs is public spaces Hi List, Can anyone point me to a reference showing SNRs that are typically observed= in public spaces (e.g., restaurants, bars ...etc)? I can find this info fo= r overall SPL, but am having a hard time finding it for SNR. Thanks Andy Sabin --_000_4e586f66907742869be062f0e9bed1cbDB3PR03MB298eurprd03pro_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:o=3D"urn:schemas-micr= osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" = xmlns:x=3D"urn:schemas-microsoft-com:office:excel" xmlns:m=3D"http://schema= s.microsoft.com/office/2004/12/omml" xmlns=3D"http://www.w3.org/TR/REC-html= 40"> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"= > <meta name=3D"Generator" content=3D"Microsoft Word 14 (filtered medium)"> <style><!-- /* Font Definitions */ @xxxxxxxx {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} @xxxxxxxx {font-family:Tahoma; panose-1:2 11 6 4 3 5 4 4 2 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm; margin-bottom:.0001pt; font-size:12.0pt; font-family:"Times New Roman","serif";} a:link, span.MsoHyperlink {mso-style-priority:99; color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:purple; text-decoration:underline;} span.EmailStyle17 {mso-style-type:personal-reply; font-family:"Calibri","sans-serif"; color:#1F497D;} .MsoChpDefault {mso-style-type:export-only; font-family:"Calibri","sans-serif";} @xxxxxxxx WordSection1 {size:612.0pt 792.0pt; margin:3.0cm 2.0cm 3.0cm 2.0cm;} div.WordSection1 {page:WordSection1;} --></style><!--[if gte mso 9]><xml> <o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" /> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext=3D"edit"> <o:idmap v:ext=3D"edit" data=3D"1" /> </o:shapelayout></xml><![endif]--> </head> <body lang=3D"EN-US" link=3D"blue" vlink=3D"purple"> <div class=3D"WordSection1"> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca= libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Dear Andy,<o:p></o:p></sp= an></p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca= libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><= /p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca= libri&quot;,&quot;sans-serif&quot;;color:#1F497D">There is, as you describe= , a lack of information regarding SNRs in various realistic listening envir= onments. The reference that has been used for decades is the work of Pearsons et al. (</span><span style=3D"font-size:11.0pt;font-f= amily:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Pearsons KS= , Bennett RL, Fidell S. (1977) Speech levels in various noise environments.= Project report on contract 68 01-2466., U.S. Environmental Protection Agency, Washington, DC.). The main results have been summarized= in a paper by Olsen (Olsen WO. (1998) Average speech levels and spectra in= various speaking/listening conditions: A summary of the Pearson, Bennett, = &amp; Fidell (1977) report <i>Am J of Audiol</i> 7: 1-5.). But, in these recordings there aren&#8217;t= any recordings in bars or restaurants.<o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca= libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><= /p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca= libri&quot;,&quot;sans-serif&quot;;color:#1F497D">There is a study by Teder= (Teder H. (1990) Noise and speech levels in noisy environments. <i>Hear Instrum</i> 41: 32-33.), where there are recordings of the type you= ask for.</span><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&q= uot;,&quot;sans-serif&quot;;color:#1F497D"><o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca= libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><= /p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca= libri&quot;,&quot;sans-serif&quot;;color:#1F497D">We have recently submitte= d a manuscript for publication where we have investigated the SNRs found in= everyday recordings made by 20 hearing-aid users (Smeds, Wolters, and Rung). The data is a further analysis of the data collected b= y Wagener et al. (</span><span style=3D"font-size:11.0pt;font-family:&quot;= Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Wagener KC, Hansen M, L= udvigsen C. (2008) Recording and classification of the acoustic environment of hearing aid users. <i>J Am Acad Audiol</i> 19: 348= -70). The &#8220;signal&#8221; in our analyses is always live speech. I&#82= 17;m happy to send you a copy of a poster we have presented on this materia= l if you contact me directly.<o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca= libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><= /p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca= libri&quot;,&quot;sans-serif&quot;;color:#1F497D">However, from your questi= on it sounds as if you&#8217;re mainly interested in &#8220;difficult situa= tions&#8221; with low SNRs. Since the recordings we analyzed were made in the informants&#8217; everyday life and recordings were only made for a 3-= 4 days, there were not that many recordings made in this type of very noisy= situations. There might also be a bias created by the fact that the inform= ants were hearing-aid users, who might find it particularly difficult in these noisy situations and might therefo= re refrain from going to noisy bars and similar. There might also be a bias= created by the fact that the persons talking to the informants took the he= aring loss into account and raised their vocal effort or decreased the speaking distance, thereby creating sl= ightly higher SNRs than would otherwise be the case.<o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca= libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><= /p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca= libri&quot;,&quot;sans-serif&quot;;color:#1F497D">But, the poster is availa= ble if you&#8217;re interested.<o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca= libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><= /p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca= libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Cheers,</span><span style= =3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;= ;color:#1F497D"><o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca= libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><= /p> <p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s= ize:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#1F49= 7D">Karolina Smeds, Director PhD<br> ORCA Europe, Widex A/S<br> Maria Bangata 4<br> SE-118 63 STOCKHOLM<br> Sweden<br> <br> &#43;46 8 455 67 60 (phone)<br> &#43;46 8 455 67 63 (phone, direct)<br> &#43;46 706 92 38 02 (mobile)<br> &#43;46 8 668 04 50 (fax)</span><span style=3D"font-size:11.0pt;font-family= :&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> <o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca= libri&quot;,&quot;sans-serif&quot;;color:#1F497D">karolina.smeds@xxxxxxxx= et<o:p></o:p></span></p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca= libri&quot;,&quot;sans-serif&quot;;color:#1F497D">www.orca-eu.info<o:p></o:= p></span></p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca= libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><= /p> <p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot= ;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s= ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> AUDITORY= - Research in Auditory Perception [mailto:AUDITORY@xxxxxxxx <b>On Behalf Of </b>Andy Sabin<br> <b>Sent:</b> den 22 januari 2014 18:53<br> <b>To:</b> AUDITORY@xxxxxxxx<br> <b>Subject:</b> [AUDITORY] Reference for typical SNRs is public spaces<o:p>= </o:p></span></p> <p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p> <div> <p class=3D"MsoNormal">Hi List,&nbsp;<o:p></o:p></p> <div> <p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p> </div> <div> <p class=3D"MsoNormal">Can anyone point me to a reference showing SNRs that= are typically observed in public spaces (e.g., restaurants, bars ...etc)? = I can find this info for overall SPL, but am having a hard time finding it = for SNR.&nbsp;<o:p></o:p></p> </div> <div> <p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p> </div> <div> <p class=3D"MsoNormal">Thanks<o:p></o:p></p> </div> <div> <p class=3D"MsoNormal">Andy Sabin<o:p></o:p></p> </div> </div> </div> </body> </html> --_000_4e586f66907742869be062f0e9bed1cbDB3PR03MB298eurprd03pro_--


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