I was cruising some Z80 forums and came across this really freaky **broken link removed** [best with headphones]. Can anyone explain how this stuff works? I could understand using stereo hearing to create the left/right illusion, but in this one the noise source appears move around you--in 3D!
our ears(pinna , ear canal etc) modify the sound we receive. the modified (freq: spectrum/phase distorted) signal is interpreted by our brain to image the sound source . u can digitaly do the same thing to simulate the effect , using DSP to modify the sound as per the Head Related Transfer Function (HRTF) . This is a common method used in virtual surround sound systems.
akg, would the effects of this HRTF vary from person to person? My friend described the noise as moving above and below, but I thought it was more of a front-to-back effect.
akg, would the effects of this HRTF vary from person to person? My friend described the noise as moving above and below, but I thought it was more of a front-to-back effect.
The transfer function is derived by modelling a human head and playing a sound around it. the difference between the played sound and what the model heared gives the transfer fn: . Since the sound image interpretation is depends on the freq and phase of 'received sound', the 'geometry' of our ear will have a effect on perception