Spencer Russell wrote: > A colleague asked me a question about how to represent spatial audio to > a mouse in some experiments. The mouse's head is fixed so the sweet > spot can be pretty small. I was thinking about 4 speakers in a quad > configuration doing ambisonics, but not sure how well the spatialization > would work in the high frequencies. I didn't get a precise bandwidth but > I think they want to play pulses in the 10-30kHz. range). > > Is this crazy?
Not crazy, but there are some difficulties. Using only four speakers means first-order horizontal-only Ambisonic replay. A first-order decoder makes assumptions about how humans localize sound. Maybe mice use the same localization cues as humans, but how would you test this? Using higher-order Ambisonics will help, here, as such decoders make less use of perceptual cues. Also, mice have much smaller heads than humans, so the transition frequency of the first-order dual-band decoder will need to be shifted higher. In theory, a decoder for humans has a transition frequency of 700 Hz as this gives a distance between the ears of half a wavelength. (In a practical decoder, the transition frequency is decreased to 400 Hz to better accommodate off-center listeners.) I don't offhand know the distance between the ears of a mouse. Regards, Martin -- Martin J Leese E-mail: martin.leese stanfordalumni.org Web: http://members.tripod.com/martin_leese/ _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
