Subject: Speakers for speech testing From: "Ward R. Drennan" <drennan(at)U.WASHINGTON.EDU> Date: Tue, 13 Sep 2005 13:32:11 -0700This is a multi-part message in MIME format. ------=_NextPart_000_0082_01C5B867.8B93F900 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Does anyone know of research that has investigated a effect of the speaker'= s frequency response on speech perception ability? We could try to get spea= ker response to be perfectly flat, but so long as we are within an ANSI sta= ndard, does it really make a difference? Does anyone know the scientific ba= sis of this standard? ANSI standard 3.6-1996 (from Katz on speech audiometry): No more than 10 dB attenuation 125-250 Hz +/- 3 dB 250-4000 Hz +/- 5 dB 4000-6000 Hz Ward R. Drennan, Ph. D. VM Bloedel Hearing Research Center University of Washington Box 357923 Seattle, WA 98195-7923 Phone: (206) 897-1848 Fax: (206) 616-1828= ------=_NextPart_000_0082_01C5B867.8B93F900 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2900.2722" name=3DGENERATOR> <DEFANGED_style_0 </STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DEFANGED_DIV><FONT face=3DArial size=3D2>Does anyone know of research that= has investigated=20 a effect of the speaker's frequency response on speech perception ability? = We=20 could try to get speaker response to be perfectly flat, but so long as we a= re=20 within an ANSI standard, does it really make a difference? Does anyone know= the=20 scientific basis of this standard?</FONT></DEFANGED_DIV> <DEFANGED_DIV><FONT face=3DArial size=3D2></FONT> </DEFANGED_DIV> <DEFANGED_DIV><FONT face=3DArial size=3D2>ANSI standard 3.6-1996 (from Katz= on speech=20 audiometry):</FONT></DEFANGED_DIV> <DEFANGED_DIV><FONT face=3DArial size=3D2>No more than 10 dB attenuation 12= 5-250=20 Hz</FONT></DEFANGED_DIV> <DEFANGED_DIV><FONT face=3DArial size=3D2>+/- 3 dB 250-4000 Hz</FONT></DEFA= NGED_DIV> <DEFANGED_DIV><FONT face=3DArial size=3D2>+/- 5 dB 4000-6000 Hz</FONT></DEF= ANGED_DIV> <DEFANGED_DIV><FONT face=3DArial size=3D2></FONT> </DEFANGED_DIV> <DEFANGED_DIV><FONT face=3DArial size=3D2>Ward R. Drennan, Ph. D.<BR>VM Blo= edel Hearing=20 Research Center<BR>University of Washington Box 357923<BR>Seattle, WA=20 98195-7923<BR>Phone: (206) 897-1848<BR>Fax: (206)=20 616-1828</FONT></DEFANGED_DIV></BODY></HTML> ------=_NextPart_000_0082_01C5B867.8B93F900--