Re: spatialisation using headphones (Holger Prante )

Subject: Re: spatialisation using headphones
From:    Holger Prante  <Prante(at)>
Date:    Sat, 31 Aug 2002 22:20:22 +0200

Hamish, i was wondering for what reason you are going to use headphones in your experiment. You would have to fix the subject's head during the test which would mean to prepare a more sophisticated set-up. If you won't fix the head the subject could turn it during presentation of the stimulus. This would lead to a spatial divergence between the auditory and the visual event. Moreover, due the the mentioned rather vaguely matched HRTF you would have your auditory event always blurred a bit (broad band signal assumed). However, everything depends on your test hypothesis. i would suggest using loudspeaker reproduction and using the well-known level and time differences between the speaker pair in order to adjust your signal spatially. This way you don't have to worry that much about the correct HRTF - you will always get the right one ;-) Best regards Holger ------------------------ Dr. Holger U. Prante Project Manager ----- Original Message ----- > Hello list! > > I'm a PhD student at the Brain Sciences Institute in Melbourne, about to > embark on my first experiment looking at cross-modal attention affects on > event-related brain potentials. I'm planning on using simulated "spatial" > stimuli in one of my tasks. I have some flashing lights located on the > left, right and center in front of a subject. There are some beeps that I'd > like to play thrpough headphones AS IF they were coming from the location of > the flashing lights. > > They don't have to be exactly localised at the location of the lights, but I > would like them to be vaugely from the same area. What I'm looking for is a > way of "spatialising" my (already made up) sound stimuli. I'm aware that > the HRTF for each person is different, but am think that perhaps i could use > a small set of typical HRTF's that would cover "large-headed", > "small-headed" etc people. > > What I was wondering was > > 1) is this a good idea > 2) where should i start looking for ways of actually implementing this? > > I have a passing familiarity with MatLab etc > > > many thanks for any pointers in the right direction! > > -hamish-

This message came from the mail archive
maintained by:
DAn Ellis <>
Electrical Engineering Dept., Columbia University