Subject: [AUDITORY] Threshold procedures used to derive current ISO and ANSI norms for thresholds From: "Hornsby, Benjamin Wade Young" <ben.hornsby@xxxxxxxx> Date: Tue, 3 Sep 2013 16:47:36 +0000 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>--_000_4E3E190AD76D794590065A186A2F3B791792DCITSHCWNEM104dsvan_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi All, I do not have access to ISO documents 389-1 or 389-2 which may provide the = answers or the references needed to answer this question. I'm hoping one of= you may know the answer or direct me to an appropriate reference. Back in the early days (Beasley, 1935, Dadson and King, 1952 and Glorig, 19= 54, 1955) of developing norms for hearing threshold it was shown that norms= varied based on whether the data were collected using "survey" methods (la= rge N but less rigorous screening and less precise threshold measurement me= thods) or a "lab-based" (generally smaller N but more stringent exclusion a= nd more precise method for threshold assessment) to derive threshold (See G= lorig, 1956). My question is: what method was used to derive the current norms? It would = be most helpful if someone could provide the reference(s) for the studies u= sed to determine audiometric zero in the current ISO standards. Thanks much, Ben --_000_4E3E190AD76D794590065A186A2F3B791792DCITSHCWNEM104dsvan_ 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><!-- /* Font Definitions */ @xxxxxxxx {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0in; margin-bottom:.0001pt; font-size:11.0pt; font-family:"Calibri","sans-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-compose; font-family:"Calibri","sans-serif"; color:windowtext;} .MsoChpDefault {mso-style-type:export-only; font-family:"Calibri","sans-serif";} @xxxxxxxx WordSection1 {size:8.5in 11.0in; margin:1.0in 1.0in 1.0in 1.0in;} 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">Hi All,<o:p></o:p></p> <p class=3D"MsoNormal">I do not have access to ISO documents 389-1 or 389-2= which may provide the answers or the references needed to answer this ques= tion. I’m hoping one of you may know the answer or direct me to an ap= propriate reference.<o:p></o:p></p> <p class=3D"MsoNormal"><o:p> </o:p></p> <p class=3D"MsoNormal">Back in the early days (Beasley, 1935, Dadson and Ki= ng, 1952 and Glorig, 1954, 1955) of developing norms for hearing threshold = it was shown that norms varied based on whether the data were collected usi= ng “survey” methods (large N but less rigorous screening and less precise threshold measurement methods) or a &#= 8220;lab-based” (generally smaller N but more stringent exclusion and= more precise method for threshold assessment) to derive threshold (See Glo= rig, 1956).<o:p></o:p></p> <p class=3D"MsoNormal"><o:p> </o:p></p> <p class=3D"MsoNormal">My question is: what method was used to derive the c= urrent norms? It would be most helpful if someone could provide the referen= ce(s) for the studies used to determine audiometric zero in the current ISO= standards.<o:p></o:p></p> <p class=3D"MsoNormal"><o:p> </o:p></p> <p class=3D"MsoNormal">Thanks much,<o:p></o:p></p> <p class=3D"MsoNormal"><o:p> </o:p></p> <p class=3D"MsoNormal">Ben <o:p></o:p></p> <p class=3D"MsoNormal"><o:p> </o:p></p> </div> </body> </html> --_000_4E3E190AD76D794590065A186A2F3B791792DCITSHCWNEM104dsvan_--