Re: Outer ear transfer function measured with headphones. (Bradley Wood Libbey )

Subject: Re: Outer ear transfer function measured with headphones.
From:    Bradley Wood Libbey  <gt1556a(at)PRISM.GATECH.EDU>
Date:    Wed, 13 Jun 2001 16:25:36 -0400

Enrique,

        I don't know of a specific reference for the actual transfer
function.  It seems that a headphone impulse response is a function of the
listener, the headphones, and the position of the headphones.  By position
I mean that if the headphones are taken off and reinstalled in apparently
the same position that the response will change, I found this from
experience and from Kulkarni's work.
        I calibrated headphones on an acoustic head for my research.  To
get at the impulse response I used a brief swept sine input, measured the
output and then determined the impulse response through a least squares
time domain solution, I believe Kulkarni used a frequency domain solution.

Hope this helps,
Brad Libbey



Kulkarni, Abhijit, H. Steven Colburn.  "Variability in the
characterization of the headphone transfer-function."  J. Acoust. Soc.
Am., vol. 107 (2), pp.1071-1074, February 2000.

Russotti, J. S., T. P. Santoro, and G. B. Haskell.  (1988).  "Proposed
Technique for Earphone Calibration."  J. Audio Eng. Soc., 36: 643-650.


On Wed, 13 Jun 2001, Enrique A. Lopez-Poveda wrote:

> Dear list,
>
> I am looking for a reference that provides the acoustic transfer function
> of the pinna measured through headphones. That is the response at the
> eardrum of an ideal click delivered through headphones. In particular, I
> am interested in the response with Sony MDR-V6 headset. Can point me
> to (or better provide) any useful reference?
>
> Thank you very much in anticipation.
>
> - Enrique
>
>
> --
> Dr. Enrique A. Lopez-Poveda
> Facultad de Medicina               Tel. +34-967599200 ext.2749
> Universidad de Castilla-La Mancha  Fax. +34-967599270 / 72 / 04
> Campus Universitario               http://emedica.med-ab.uclm.es
> 02071 Albacete -- Spain
>