Hi Fons
On 30/05/2012 18:24, Fons Adriaensen wrote:
On Wed, May 30, 2012 at 02:10:22PM +0100, Augustine Leudar wrote:
but anyone listening carefully would have heard a fly about 1 foot high !
This magnification effect has been reported many times.
I wonder how much it has to do with playing back at too high
levels. We do associate LF energy and size. Too much of it
and the source 'must be' big.
That's certainly important - kind of the other end of the scale of quite but distorted sounds can be
interpreted as very loud sounds but with a distant source. For sound sources with perceivable
angular extensions which are perceived as single objects (pianos, geese and steam loco's have been
mentioned in the past), there is an even stronger cue in that for the angles to be right the
perceived size of the object is set by the perceived distance which can in turn be modified if the
reproduction space reverberation is dominant over the recorded reverberation. Whilst familiarity
with the source can overlay some of this , even in York, where we are so familiar with geese ** that
there's an informal ban on students recording them, we still find it difficult to hear anything
other than Peter Lennox's giant geese when an Ambisonic recording is played back in a reverberant room.
Dave
** At present I can see half a dozen Canada geese with young outside my window and some Greylags out
on the lake - and I can hear a lot more! .
PS - I gather you guys in Parma might be getting pretty shaken up by the earthquakes in Northern
Italy - hope all is well there.
--
These are my own views and may or may not be shared by my employer
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/* Dave Malham http://music.york.ac.uk/staff/research/dave-malham/ */
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/* UK 'Ambisonics - Component Imaging for Audio' */
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