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Re: Sound externalization in Headphone

Dear Junfeng,

What is termed "in-the-head" localization would be basically any stereo
recording played back over headphones. If you try to locate the acoustic
sources, they will lie on a line between your ears. An "out-of-the-head"
localization, where sound sources are in there more realistic positions,
outside your head, requires some sort of binaural encoding, whether through
HRTF signal processing or recording on a dummy/real head. To BEST experience
this, you can make a recording with some small microphones in your ears.
This is well worth doing for any researcher interested in binaural and

Some examples of others recording, which I think work well are:
The virtual barber shop : http://www.youtube.com/watch?v=IUDTlvagjJA 
Holophonic ball experiment : http://holophonicballexperiment.com/ 

You can also do a youtube search for "binaural sound demo"

For other examples, and more information, I suggest you contact some of the
researchers in Japan who are working a lot on these subjects. I would
suggest Dr. Yôiti Suzuki (http://www.ais.riec.tohoku.ac.jp/)and Dr. Makoto
Otani (http://www.cs.shinshu-u.ac.jp/~otani/), as I have worked with both of
them. There are of course many others in Japan. 


-Brian FG Katz

Date:    Fri, 3 Jun 2011 20:46:04 +0800
From:    Junfeng Li <junfeng@xxxxxxxxxxx>
Subject: Sound externalization in Headphone

Dear list, 

Does anyone provide some information (e.g., sound samples) on sound
externalization in headphone through binaural rendering/reproduction

As I know, the sound externalization is a big problem for binaural sound
reproduction with headphone. While, I have never heard the 'in-the-head'
sound and 'out-of-the-head' sound which possibly processed by some signal
processing algorithms. 

Could anyone comment on this issue and provide some sound samples to make me
know the impression of in/out-the-head sound samples?

Thank you so much in advance.

Best regards,

Brian FG Katz, Ph.D
Audio & Acoustique
BP 133
F91403 Orsay
tel. (+33) 01 69 85 81 55
fax. (+33)
e-mail Brian.Katz@xxxxxxxx <mailto:Brian.Katz@xxxxxxxx>
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