Subject: Re: Speech signal SPL & S/N From: Mike Brookes <mike.brookes(at)IC.AC.UK> Date: Wed, 18 Mar 1998 07:59:47 -0000Athanassios Protopapas wrote: > I am looking for advice on calibrating sound pressure levels for speech > stimuli. This topic is covered in ITU-T standard P.56: "Objective Measurement of Active Speech Level". The method described in the standard only works if the SNR is better than 21dB or so. The standard refers to two papers (which I haven't looked at myself): (1) R.W.Berry: Speech-volumne measurements on telephone circuits, Proc IEE, Vol 118, No 2, pp 335-338, Feb 1971 (2) P.T.Brady: Equivalent Peak Level: a threshold independent speech level measure, JASA, Vol 44, pp695-699, 1968. ************************************************************ Mike Brookes, EEE Dept, Imperial College, London SW7 2BT, UK Tel: +44 (0) 171-594-6165 Fax: +44 (0) 171-823-8125 Email: mike.brookes(at)ic.ac.uk WWW: http://www.ee.ic.ac.uk/hp/staff/dmb/dmb.html