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></style> </head> <body lang=3D"EN-US" link=3D"blue" vlink=3D"purple"> <div class=3D"WordSection1"> 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) 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, = & Fidell (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, L= udvigsen C. (2008) Recording 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 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> <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> karolina.smeds@xxxxxxxx= et<o:p></o:p> www.orca-eu.info<o:p></o:= p> <o:p> </o:p><= /p> From: AUDITORY= - Research in Auditory Perception [mailto:AUDITORY@xxxxxxxx On Behalf Of Andy Sabin Sent: den 22 januari 2014 18:53 To: AUDITORY@xxxxxxxx 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> </div> </body> </html> --_000_4e586f66907742869be062f0e9bed1cbDB3PR03MB298eurprd03pro_--

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