Subject: AW: measuring output volume from headphones From: Stefan Kerber <kerber@xxxxxxxx> Date: Thu, 7 Sep 2006 09:52:31 +0200A simple way to measure output volume is to measure the voltage at the input of the headphones (for a defined signal, like a 1kHz sine) and calculate sound pressure level using the headphones' transfer function. Doing it this way should also make it easy to change the headphones between different locations. Greetings Stefan -----Ursprungliche Nachricht----- Von: AUDITORY Research in Auditory Perception [mailto:AUDITORY@xxxxxxxx Auftrag von Robbin Miranda Gesendet: Mittwoch, 6. September 2006 21:11 An: AUDITORY@xxxxxxxx Betreff: measuring output volume from headphones Hello, Can any of you recommend a way to measure the output volume/decibel level from headphones? We will be testing participants using auditory music and speech stimuli on two different computers (depending on availability of the two testing rooms) and would like to make sure that the output volume level is equivalent at both locations. We do have a decibel meter (from Radio Shack), but this doesn't seem feasible to use with headphones. Thanks, Robbin Robbin Miranda Interdisciplinary Program in Neuroscience Georgetown University 3900 Reservoir Rd., NW Washington DC 20007 (202) 687-8449