Re: Reference for typical SNRs is public spaces (Peter Lennox )

Subject: Re: Reference for typical SNRs is public spaces From: Peter Lennox <P.Lennox@xxxxxxxx> Date: Thu, 23 Jan 2014 12:04:54 +0000 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY> --_000_28F33490C302424E98CC6DC2531B2048E7FE34D5F5MKTMBX01unive_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable 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= GILL.CA] On Behalf Of Karolina Smeds Sent: 23 January 2014 08:01 To: 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 de= cades is the work of Pearsons et al. (Pearsons KS, Bennett RL, Fidell S. (= 1977) Speech levels in various noise environments. Project report on contr= act 68 01-2466., U.S. Environmental Protection Agency, Washington, DC.). T= he main results have been summarized in a paper by Olsen (Olsen WO. (1998)= Average speech levels and spectra in various speaking/listening condition= s: A summary of the Pearson, Bennett, & Fidell (1977) report Am J of Audio= l 7: 1-5.). But, in these recordings there aren't any recordings in bars o= r restaurants. There is a study by Teder (Teder H. (1990) Noise and speech levels in nois= y environments. Hear Instrum 41: 32-33.), where there are recordings of th= e type you ask for. We have recently submitted a manuscript for publication where we have inve= stigated the SNRs found in everyday recordings made by 20 hearing-aid user= s (Smeds, Wolters, and Rung). The data is a further analysis of the data c= ollected by Wagener et al. (Wagener KC, Hansen M, Ludvigsen C. (2008) Reco= rding 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'm happy to send you a copy of a poster we have presented on thi= s material if you contact me directly. However, from your question it sounds as if you're mainly interested in "d= ifficult situations" 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 no= isy situations. There might also be a bias created by the fact that the in= formants were hearing-aid users, who might find it particularly difficult = in these noisy situations and might therefore 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 hearing loss into account and r= aised their vocal effort or decreased the speaking distance, thereby creat= ing slightly 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= GILL.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 observe= d 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. Thanks Andy Sabin The University of Derby has a published policy regarding email and reserve= s 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 For all FOI requests please contact: foi@xxxxxxxx All other Contacts are at http://www.derby.ac.uk/its/contacts/ --_000_28F33490C302424E98CC6DC2531B2048E7FE34D5F5MKTMBX01unive_ 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-mic= rosoft-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"ht= tp://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV=3D"Content-Type" CON= TENT=3D"text/html; charset=3Dus-ascii"><meta name=3DGenerator content=3D"M= icrosoft Word 14 (filtered medium)"><style></style></head><body lang=3DEN-GB link=3Dblue vl= ink=3Dpurple><div class=3DWordSection1>Does a= nyone take account of spatial distribution of noise in these cases?<o:p></= o:p>Regards<o:p></o:p><= p class=3DMsoNormal>ppl<o:p></o:p>= <o:p> </o:p><div>Dr. Peter Lennox<o:p></o:p><o:p> </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: 01= 332 593155<o:p></o:p></div><o:p>&n= bsp;</o:p><div><div style=3D'border:none;border-top:solid #B5C4= DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>From:</s= pan> AUDITORY - Research in Auditory Perception [mailto:AUDITORY= @xxxxxxxx On Behalf Of Karolina Smeds Sent: 23 Ja= nuary 2014 08:01 To: AUDITORY@xxxxxxxx Subject:= Re: Reference for typical SNRs is public spaces<o:p></o:p></di= v></div><o:p> </o:p><sp= an lang=3DEN-US style=3D'font-size:11.0pt;font-family:"Calibri","sans-seri= f";color:#1F497D'>Dear Andy,<o:p></o:p><sp= an lang=3DEN-US style=3D'font-size:11.0pt;font-family:"Calibri","sans-seri= f";color:#1F497D'><o:p> </o:p>There is, as you describe, a lack of information regarding S= NRs in various realistic listening environments. The reference that has be= en used for decades is the work of Pearsons et al. (Pearsons KS, Bennett R= L, Fidell S. (1977) Speech levels in various noise environments. Project r= eport on contract 68 01-2466., U.S. Environmental Protection Agency, Washi= ngton, DC.). The main results have been summarized in a paper by Olsen (Ol= sen WO. (1998) Average speech levels and spectra in various speaking/liste= ning conditions: A summary of the Pearson, Bennett, & Fidell (1977) re= port Am J of Audiol 7: 1-5.). But, in these recordings there aren&#= 8217;t any recordings in bars or restaurants.<o:p></o:p><o:p> </o: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></span= ><o:p> </o:p></p= >We have recently submitted a ma= nuscript for publication where we have investigated the SNRs found in ever= yday recordings made by 20 hearing-aid users (Smeds, Wolters, and Rung). T= he data is a further analysis of the data collected by Wagener et al. (Wag= ener KC, Hansen M, Ludvigsen C. (2008) Recording and classification of the= acoustic environment of hearing aid users. J Am Acad Audiol 19: 34= 8-70). The “signal” in our analyses is always live speech. I&#= 8217;m happy to send you a copy of a poster we have presented on this mate= rial if you contact me directly.<o:p></o:p><o:p> </o:p><sp= an lang=3DEN-US style=3D'font-size:11.0pt;font-family:"Calibri","sans-seri= f";color:#1F497D'>However, from your question it sounds as if you’re= mainly interested in “difficult situations” with low SNRs. Si= nce 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 ma= ny recordings made in this type of very noisy situations. There might also= be a bias created by the fact that the informants were hearing-aid users,= who might find it particularly difficult in these noisy situations and mi= ght therefore refrain from going to noisy bars and similar. There might al= so be a bias created by the fact that the persons talking to the informant= s took the hearing loss into account and raised their vocal effort or decr= eased the speaking distance, thereby creating slightly higher SNRs than wo= uld otherwise be the case.<o:p></o:p><span= lang=3DEN-US style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"= ;color:#1F497D'><o:p> </o:p>But, the poster is available if you’re interested.<o:p><= /o:p><o:p> </o:p= >Cheers,<o:p></o:p></= span><o:p> </o:p></span= >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:karolina.smeds@xxxxxxxx">ka= rolina.smeds@xxxxxxxx</a><o:p></o:p><s= pan lang=3DEN-US style=3D'font-size:11.0pt;font-family:"Calibri","sans-ser= if";color:#1F497D'><a href=3D"http://www.orca-eu.info">www.orca-eu.info</a= ><o:p></o:p><o:p>&nbs= p;</o:p>From: AU= DITORY - Research in Auditory Perception [<a href=3D"mailto:AUDITORY@xxxxxxxx= .MCGILL.CA">mailto:AUDITORY@xxxxxxxx</a>] On Behalf Of Andy = Sabin Sent: den 22 januari 2014 18:53 To: <a href=3D"m= ailto:AUDITORY@xxxxxxxx">AUDITORY@xxxxxxxx</a> Subject= : [AUDITORY] Reference for typical SNRs is public spaces<o:p></o:p></s= pan><o:p> </o:p></= p><div>Hi List, <o:p></o:p></= span><div><o:p> </o:p></s= pan></div><div>Can anyone poin= t me to a reference showing SNRs that are typically observed in public spa= ces (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></p= ></div><div><o:p> </o:p></spa= n></div><div>Thanks<o:p></o:p>= </div><div>Andy Sabin<o= :p></o:p></div></div></div> The University of Derby has a published policy regarding email and reserve= s 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 For all FOI requests please contact: foi@xxxxxxxx All other Contacts are at http://www.derby.ac.uk/its/contacts/ </body></html> --_000_28F33490C302424E98CC6DC2531B2048E7FE34D5F5MKTMBX01unive_--

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