That's a very cool idea ... but also very difficult. The overall topic
is generally referred to as "localisation". You are describing "dummy
head recording". Spectrum analysis will be an important tool, though in
some cases inspecting the waveform may show how phase differences
between the ears contribute to localisation. This "inter-aural
difference" is an important element. It is known, for example, that
localisation depends not only on distance, but also on pitch - low
frequencies are virtually impossible to localise as the phase is not
sufficiently different between the ears. Which is why we may need 5
speakers, in just the right positions, to hear music in "surround", but
just one sub-woofer, which can be placed just about anywhere.
The best place to ask about this is probably the sursound list, where
there is plenty of expertise on spatial audio, microphones, dummy heads,
such things as HRTFs, the role of the pinnae in sensing source
direction, etc. There are opinions on whether a dumy head is enough, or
whether you need a dummy torso as well, as it is thought we pick up
subtle reflections from the torso as another spatial clue.
https://mail.music.vt.edu/mailman/listinfo/sursound
Richard Dobson
On 24/01/2018 22:21, Mahboud Zabetian wrote:
Hi. I know this isn't the right list, so if you please know of one, send me a
link please.
My daughter's doing a project for school. She wants to install two mono mics
on a mannequin head, and record left and right from each so that she can do
some experiments with how human ears hear sounds spatially. She'll be
combining the two mics into one mic jack and then use AudioEngine on iOS to
record two separate files of audio simultaneously. She will then play with the
audio files on a Mac to make or break her hypotheses.
I'm in charge of microphone procurement. I wanted something relatively flat
that could be installed in an over-the-head headphone, so that she could easily
go from mannequin to a person's head. I wanted it to work well without an amp,
since that would just complicate things for her (I can't help her more than to
pay for the microphone or show her the AudioEngine sample code).
Any tips would be appreciated. (Good audio visualization tools would be great
too. She may be getting some help from a university professor who suggested
studying the waves on an oscilloscope. These days there must be plenty of
tools on the Mac or iOS, no?)
Thank you.
mahboud
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