Subject: Loudness and AI From: "Christine M. Rankovic" <rankovic(at)ARTICULATION.COM> Date: Mon, 23 Aug 2004 14:58:31 -0400This is a multi-part message in MIME format. ------=_NextPart_000_000D_01C48921.A7951D30 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Belisario: Loudness and the articulation index are closely related in Fletcher's definitive version of the articulation index calculation (Fletcher and = Galt, 1950). For example, Fletcher's version uses two sets of frequency-wise weights to account for the consequences of the frequency response on speech sound recognition. These weights are referred to as G1 (low = speech levels) and G4 (high speech levels) and were derived from loudness experiments using speech. The loudness weights are used in addition to = the well-known band-importance weights (Fletcher's D). Notably, loudness is = NOT included in other versions of the articulation index calculation such as ANSI S3.5-1969; 1997. Reference: Fletcher, H. and Galt, R.H. (1950). "The perception of = speech and its relation to telephony," Journal of the Acoustical Society of = America 22, 89-151. Christine M Rankovic, PhD Articulation Incorporated 94 Berkshire Road Newton, MA 02460 617-354-8334 AI =3D V x E x F x H ----- Original Message -----=20 From: "Belisario Nina" <beli(at)FEM.UNICAMP.BR> To: <AUDITORY(at)LISTS.MCGILL.CA> Sent: Sunday, August 22, 2004 4:49 PM Subject: Loudness and Articulation index > Is it possible to say that Loudness and Articulation index are closely > related? > Any advice is really appreciated. > Belisario > > -- > Faculdade de Engenharia Mecanica - UNICAMP ------=_NextPart_000_000D_01C48921.A7951D30 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!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 6.00.2800.1400" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2><FONT face=3D"Times New Roman"=20 size=3D3>Belisario:<BR><BR>Loudness and the articulation index are = closely related=20 in Fletcher's<BR>definitive version of the articulation index = calculation=20 (Fletcher and Galt,<BR>1950). For example, Fletcher's version uses = two=20 sets of frequency-wise<BR>weights to account for the consequences of the = frequency response on<BR>speech sound recognition. These weights = are=20 referred to as G1 (low speech<BR>levels) and G4 (high speech levels) and = were=20 derived from loudness<BR>experiments using speech. The loudness = weights=20 are used in addition to the<BR>well-known band-importance weights = (Fletcher's=20 D). Notably, loudness is NOT<BR>included in other versions of the=20 articulation index calculation such as<BR>ANSI S3.5-1969;=20 1997.<BR><BR>Reference: Fletcher, H. and Galt, R.H.=20 (1950). "The perception of speech<BR>and its relation to = telephony,"=20 Journal of the Acoustical Society of America<BR>22, = 89-151.<BR><BR>Christine M=20 Rankovic, PhD<BR>Articulation Incorporated<BR>94 Berkshire = Road<BR>Newton,=20 MA 02460<BR>617-354-8334<BR><BR>AI =3D V x E x F x H<BR><BR>----- = Original=20 Message ----- <BR>From: "Belisario Nina" <</FONT><A=20 href=3D"mailto:beli(at)FEM.UNICAMP.BR"><FONT face=3D"Times New Roman"=20 size=3D3>beli(at)FEM.UNICAMP.BR</FONT></A><FONT face=3D"Times New Roman"=20 size=3D3>><BR>To: <</FONT><A = href=3D"mailto:AUDITORY(at)LISTS.MCGILL.CA"><FONT=20 face=3D"Times New Roman" = size=3D3>AUDITORY(at)LISTS.MCGILL.CA</FONT></A><FONT=20 face=3D"Times New Roman" size=3D3>><BR>Sent: Sunday, August 22, 2004 = 4:49=20 PM<BR>Subject: Loudness and Articulation index<BR><BR><BR>> Is it = possible to=20 say that Loudness and Articulation index are closely<BR>> = related?<BR>>=20 Any advice is really appreciated.<BR>> Belisario<BR>><BR>> = --<BR>>=20 Faculdade de Engenharia Mecanica - = UNICAMP</FONT><BR></FONT></DIV></BODY></HTML> ------=_NextPart_000_000D_01C48921.A7951D30--