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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 = V x E x F x H ----- Original Message ----- From: "Belisario Nina" <beli@FEM.UNICAMP.BR> To: <AUDITORY@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 |