Thanks Dave. Theoretically then, for a given listening position (for
which we position a mic in order make impulse responses), if we make
impulse responses for every possible location in the space, it would be
possible to spatialise a sound with both angular and distance cues,
through a process of convolution with the various impulse responses and
subsequent ambisonic decoding?

Iain



Em Sex, 2013-05-03 às 12:10 +0100, Dave Malham escreveu:
> Hi there,
>     The two main mechanisms (which are certainly not the only ones!)
> for distance perception are the ratio of direct to reverberant sound
> and the pattern of early reflections. Both of these are captured with
> B format impulse responses but of course only for the given
> source/listener/room configuration You can edit the impulse response
> to some extent to change these or record multiple IR's and interpolate
> between them - but frankly it might be better to build models based on
> the recorded IR's and/or room plans and then then synthesise the IR's.
> 
> 
>      Dave
> 
> On 3 May 2013 11:00, Iain Mott <m...@reverberant.com> wrote:
>         Hi list, I wonder if someone could clear up some doubts I
>         have:
>         
>         Does an ambisonic impulse response recorded in a space, with
>         microphone
>         and impulse source at specific locations, reproduce any
>         distance cues
>         when convolved with an anechoic mono source and decoded
>         ambisonically
>         over a speaker array, or just angular cues?
>         
>         I know that HRTF filters are recorded anecoically, so distance
>         of the
>         impulse wouldn't matter, as i understand it. But what if
>         impulses were
>         recorded at various angles and a particular distance in a live
>         room? How
>         would one set of angular responses at a given distance compare
>         with
>         another set made with the same angles but at a different
>         distance?
>         
>         Thanks,
>         
>         Iain
>         
>         _______________________________________________
>         Sursound mailing list
>         Sursound@music.vt.edu
>         https://mail.music.vt.edu/mailman/listinfo/sursound
> 
> 
> 
> 
> -- 
> As of 1st October 2012, I have retired from the University, so this
> disclaimer is redundant....
> 
> 
> These are my own views and may or may not be shared by my employer
> 
> Dave Malham  
> Ex-Music Research Centre
> Department of Music   
> The University of York 
> Heslington
> York YO10 5DD
> UK
> 
> 'Ambisonics - Component Imaging for Audio'
> 
> 
> 


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