Subject: Re: EEG signals From: Pablo Hoffmann <pfh@xxxxxxxx> Date: Thu, 16 Mar 2006 15:09:42 +0100Dea Vicsi, I have an acoustical background, and for my master thesis I worked along with a friend from biomedical engineering in a topic very close to the task you have. We measured EEG signals on people while they were performing a sound localization task in an anechoic environment. We could actually observe some components, such as the N100 (or N1), in the event-related potential responses we obtained. We analyzed the data by looking at how the latency and amplitude of this component changed as a function of sound direction. The idea was to see whether there was any correlation between the direction of the sound and how these parameters varied. It was a very interesting experience but we couldn't observe any real specific pattern. If you are interested on further details about this thesis please contact me. For more information on this topic I suggest you to a look at the work done by Kalle Palomäki at Helsinki University of Technology. His doctoral research was related to cortical processing of spatial sound. Here is a link http://lib.tkk.fi/Diss/2005/isbn9512277174/ regards, Pablo Pablo Faundez Hoffmann Ph.D. Student Department of Acoustics Aalborg University Frederik Bajers Vej 7 B5 DK-9220 Aalborg Denmark office: B4-201 phone: (+45) 96 35 87 28 fax: (+45) 98 15 21 44 email: pfh@xxxxxxxx <mailto:pfh@xxxxxxxx> Vicsi Klara wrote: > Dear Colleagues, > > I am the head of a Laboratory of Speech Acoustics. We have got a task, > the object of which is unfamiliar to us. This task would be to reason > out if it is possible to find out, by analysis of the EEG signals from > a person, which sound source he is concentrates on, in a multi-source > space. Also, we had to turn out how the brain reflects the changes in > the location of the sound-source, or the switching the attention from > one to another sound source. > We are going to run the experiments in our an-echoing chamber. > Have somebody prepared similar experiments? Do you think, it is > possible to get usable answers to the above questions by this way? > Or can somebody advice other methods to study these problems? > > Waiting for your advices > Thank you in advance > > Klara Vicsi > > -------------------------------------------------- > Klara Vicsi, PhD. > Head of the Laboratory of Speech Acoustics > Dept. of Telecommunications and Telematics > Budapest University of Technology and Economics > Budapest, XI. > Sztoczek u. 2. > H-1111 > > Hungary > tel:36-1-4631940, tel:36-1-4631886 > mobil:304743503 > fax:36-1-3720403 > e-mail address: vicsi@xxxxxxxx > home page: http://alpha.tmit.bme.hu/speech/ >