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 12:24:20 +0000 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY> --_000_b31a0365fe504e1ebeab38c1a12ac063DB3PR03MB298eurprd03pro_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Dear Peter, In our case, we have only analyzed recordings made with two microphones pla= ced above the ears, where a hearing-aid microphone would be placed in a beh= ind-the-ear hearing aid. We can only guess (by listening) what the spatial = distribution of noise is like. Regards, Karolina Smeds From: Peter Lennox [mailto:P.Lennox@xxxxxxxx Sent: den 23 januari 2014 13:05 To: Karolina Smeds; AUDITORY@xxxxxxxx Subject: RE: Reference for typical SNRs is public spaces Does anyone take account of spatial distribution of noise in these cases? Regards ppl Dr. Peter Lennox School of Technology, Faculty of Arts, Design and Technology University of Derby, UK e: p.lennox@xxxxxxxx<mailto:p.lennox@xxxxxxxx> t: 01332 593155 From: AUDITORY - Research in Auditory Perception [mailto:AUDITORY@xxxxxxxx= ILL.CA] On Behalf Of Karolina Smeds Sent: 23 January 2014 08:01 To: AUDITORY@xxxxxxxx<mailto:AUDITORY@xxxxxxxx> Subject: Re: Reference for typical SNRs is public spaces 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<mailto:karolina.smeds@xxxxxxxx> www.orca-eu.info<http://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<mailto: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 The University of Derby has a published policy regarding email and reserves= the right to monitor email traffic. If you believe this was sent to you in= error, please select unsubscribe. Unsubscribe and Security information contact: infosec@xxxxxxxx<mailto:in= fosec@xxxxxxxx> For all FOI requests please contact: foi@xxxxxxxx<mailto:foi@xxxxxxxx= > All other Contacts are at http://www.derby.ac.uk/its/contacts/ --_000_b31a0365fe504e1ebeab38c1a12ac063DB3PR03MB298eurprd03pro_ 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:m=3D"http://schemas.microsoft.com/office/2004/12/omml" xmlns=3D"http:= //www.w3.org/TR/REC-html40"> <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></style> </head> <body lang=3D"EN-US" link=3D"blue" vlink=3D"purple"> <div class=3D"WordSection1"> Dear Peter,<o:p></o:p></s= pan> <o:p> </o:p><= /p> In our case, we have only= analyzed recordings made with two microphones placed above the ears, where= a hearing-aid microphone would be placed in a behind-the-ear hearing aid. We can only guess (by listening) what the spatial distributio= n of noise is like.<o:p></o:p> <o:p> </o:p><= /p> Regards,<o:p></o:p></span= > <o:p> </o:p><= /p> <div> Karolina Smeds<o:p></o:p> </div> <o:p> </o:p><= /p> <div> <div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm = 0cm 0cm"> From: Peter Le= nnox [mailto:P.Lennox@xxxxxxxx Sent: den 23 januari 2014 13:05 To: Karolina Smeds; AUDITORY@xxxxxxxx Subject: RE: Reference for typical SNRs is public spaces<o:p></o:p><= /span> </div> </div> <o:p> </o:p> Does anyon= e take account of spatial distribution of noise in these cases?<o:p></o:p><= /span> Regards<o:= p></o:p> ppl<o:p></= o:p> <o:p>&nbsp= ;</o:p> <div> Dr. Peter = Lennox<o:p></o:p> <o:p>&nbsp= ;</o:p> School of = Technology,<o:p></o:p> Faculty of= Arts, Design and Technology<o:p></o:p> University= of Derby, UK<o:p></o:p> e: <a href=3D"mailto:p.lennox@xxxxxxxx">p.lennox@xxxxxxxx</a> <o:p></o:p= > t: 01332 5= 93155<o:p></o:p> </div> <o:p>&nbsp= ;</o:p> <div> <div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm = 0cm 0cm"> From: AUDITORY= - Research in Auditory Perception [<a href=3D"mailto:AUDITORY@xxxxxxxx= .CA">mailto:AUDITORY@xxxxxxxx</a>] On Behalf Of Karolina Smeds Sent: 23 January 2014 08:01 To: <a href=3D"mailto:AUDITORY@xxxxxxxx">AUDITORY@xxxxxxxx= L.CA</a> Subject: Re: Reference for typical SNRs is public spaces<o:p></o:p><= /span> </div> </div> <o:p> </o:p> Dear Andy,<o:p></o:p></sp= an> <o:p> </o:p><= /p> 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. (Pearsons KS, Bennett RL, Fidell S. (1977) Spe= ech levels in various noise environments. Project report on contract 68 01-= 2466., U.S. Environmental Protection Agency, Washington, DC.). The main res= ults have been summarized in a paper by Olsen (Olsen WO. (1998) Average speech levels and spectra in various sp= eaking/listening conditions: A summary of the Pearson, Bennett, & Fidel= l (1977) report Am J of Audiol 7: 1-5.). But, in these recordings there aren’t= any recordings in bars or restaurants.<o:p></o:p> <o:p> </o:p><= /p> 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.<o:p></o:p> <o:p> </o:p><= /p> 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. (Wagener KC, Hansen M, Ludvigsen C. (2008) Recording and c= lassification of the acoustic environment of hearing aid users. J Am Acad Audiol 19: 348-70). The “signal” in our analys= es is always live speech. I’m happy to send you a copy of a poster we= have presented on this material if you contact me directly.<o:p></o:p></sp= an> <o:p> </o:p><= /p> However, from your questi= on it sounds as if you’re mainly interested in “difficult situa= tions” with low SNRs. Since the recordings we analyzed were made 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 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> <o:p> </o:p><= /p> But, the poster is availa= ble if you’re interested.<o:p></o:p> <o:p> </o:p><= /p> Cheers,<o:p></o:p>= <o:p> </o:p><= /p> 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) <o:p></o:p> <a href=3D"mailto:karolin= a.smeds@xxxxxxxx">karolina.smeds@xxxxxxxx</a><o:p></o:p> <a href=3D"http://www.orc= a-eu.info">www.orca-eu.info</a><o:p></o:p> <o:p> </o:p><= /p> From: AUDITORY= - Research in Auditory Perception [<a href=3D"mailto:AUDITORY@xxxxxxxx= .CA">mailto:AUDITORY@xxxxxxxx</a>] On Behalf Of Andy Sabin Sent: den 22 januari 2014 18:53 To: <a href=3D"mailto:AUDITORY@xxxxxxxx">AUDITORY@xxxxxxxx= L.CA</a> Subject: [AUDITORY] Reference for typical SNRs is public spaces<o:p>= </o:p> <o:p> </o:p> <div> Hi List, <o:p></o:p> <div> <o:p> </o:p> </div> <div> 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. <o:p></o:p> </div> <div> <o:p> </o:p> </div> <div> Thanks<o:p></o:p> </div> <div> Andy Sabin<o:p></o:p> </div> </div> The University of Derby has a published policy regarding email and reserves= the right to monitor email traffic. If you believe this was sent to you in= error, please select unsubscribe. Unsubscribe and Security information contact: <a href=3D"mailto:infosec@xxxxxxxx= by.ac.uk"> infosec@xxxxxxxx</a> For all FOI requests please contact: <a href=3D"mailto:foi@xxxxxxxx">foi= @xxxxxxxx</a> All other Contacts are at <a href=3D"http://www.derby.ac.uk/its/contacts/">= http://www.derby.ac.uk/its/contacts/</a><o:p></o:p> </div> </body> </html> --_000_b31a0365fe504e1ebeab38c1a12ac063DB3PR03MB298eurprd03pro_--

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