[Audio Empire]

On Tue, 12 Jun 2012 04:30:37 -0700, KH wrote
(in article ):

On 6/11/2012 4:52 PM, Audio Empire wrote:

snip

You both forgot phase differences.

What feature of phase difference cannot be characterized as "temporal"
difference?

Keith


Not the same thing. Two sounds can arrive at the microphone (or ears) at
exactly the same time, and yet one sound can have a different phase
relationship to the overall sound field than the other. Temporally, they're
alike but the varying phase relationships will add to or subtract from the
overall "sound picture". In fact, if you are miking an ensemble with two
spaced omnidirectional mikes, the phase difference between left and right
channels will actually cause some instruments to "disappear" when you blend
the right and left mike feeds to achieve mono. Phase differences are one of
the main clues our ears use to determine directionality (the others being
temporal - the time delay between between sounds reaching the right and the
left ears, and level differences - the difference in volume between a sound
reaching the left and right ear.