Subject: B=?ISO-8859-1?Q?=E9k=E9sy?= tracking From: Daniel Oberfeld <oberfeld(at)UNI-MAINZ.DE> Date: Wed, 12 Oct 2005 18:13:50 +0200Dear list: we want to use Békésy tracking (with a constant change in frequency) to measure absolute thresholds as a function of frequency in a study involving tinnitus patients. The stimuli will be 300-ms tone bursts. Now I do remember that for the level change a rate of 2 dB/s is used frequently -- but what rate of change in frequency (oct/s) should one opt for? I'm sure that many of you have experiences with this procedure - which parameters do you use? Above that, is there anyone who would be willing to share some MATLAB code for Békésy tracking - seems there's no need for re-inventing the wheel... Best regards, Daniel --------------------------- Dr. Daniel Oberfeld-Twistel Universität Mainz Institute of Psychology Experimental Psychology Staudingerweg 9 55128 Mainz Germany Phone ++49 (0) 6131 39 22423 Fax ++49 (0) 6131 39 22480 http://www.staff.uni-mainz.de/oberfeld/