tomwalters@0: /*
tomwalters@0:     Copyright (c) Applied Psychology Unit, Medical Research Council. 1988, 1989
tomwalters@0:     ===========================================================================
tomwalters@0: 
tomwalters@0:     Permission to use, copy, modify, and distribute this software without fee 
tomwalters@0:     is hereby granted for research purposes, provided that this copyright 
tomwalters@0:     notice appears in all copies and in all supporting documentation, and that 
tomwalters@0:     the software is not redistributed for any fee (except for a nominal shipping 
tomwalters@0:     charge). Anyone wanting to incorporate all or part of this software in a
tomwalters@0:     commercial product must obtain a license from the Medical Research Council.
tomwalters@0: 
tomwalters@0:     The MRC makes no representations about the suitability of this 
tomwalters@0:     software for any purpose.  It is provided "as is" without express or implied 
tomwalters@0:     warranty.
tomwalters@0:  
tomwalters@0:     THE MRC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING 
tomwalters@0:     ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL THE
tomwalters@0:     A.P.U. BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY 
tomwalters@0:     DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN 
tomwalters@0:     AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
tomwalters@0:     OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
tomwalters@0: */
tomwalters@0: 
tomwalters@0: /*  
tomwalters@0:     Acknowledgment:
tomwalters@0:     ==============
tomwalters@0: 
tomwalters@0:     The source code provided in this file was originally developed by 
tomwalters@0:     Christian Giguere as part of a Ph.D degree at the Department of
tomwalters@0:     Engineering of the University of Cambridge from April 1990 to
tomwalters@0:     November 1993. The code was subsequently adapted under a grant
tomwalters@0:     from the Hearing Research Trust for full compatibility with 
tomwalters@0:     AIM Release 6.15.
tomwalters@0: 
tomwalters@0:     Christian Giguere 25/03/94
tomwalters@0: 
tomwalters@0: */
tomwalters@0: 
tomwalters@0: /*
tomwalters@0:     ===========================================================
tomwalters@0:     ear.h 
tomwalters@0:     ===========================================================
tomwalters@0: 
tomwalters@0:     Design of outer and middle ear (EAR) filter.
tomwalters@0:     (uncoupled version)
tomwalters@0: 
tomwalters@0:     Author        : Christian Giguere
tomwalters@0:     First written : 01st June, 1991
tomwalters@0:     Last edited   : 07th March, 1994
tomwalters@0:     ===========================================================
tomwalters@0: */
tomwalters@0: 
tomwalters@0: #ifndef _EAR_H_
tomwalters@0: 
tomwalters@0: 
tomwalters@0: /***** defines *****/
tomwalters@0: 
tomwalters@0: #define _EAR_H_
tomwalters@0: 
tomwalters@0: #define   RHO_air        (   1.14e-03 )       /* air density (g/cm3) */ 
tomwalters@0: #define   C              (     3.5e04 )       /* sound velocity in air (cm/s) */
tomwalters@0: #define   As             (       25.0 )       /* effective diffraction radius of head-torso (cm) */
tomwalters@0: 
tomwalters@0: 
tomwalters@0: /***** data structure *****/
tomwalters@0:  
tomwalters@0: typedef struct _tube_info  TubeInfo ;
tomwalters@0: 
tomwalters@0: struct _tube_info {
tomwalters@0:   int    Nsegments ;           /* number of tube segments */
tomwalters@0:   double length ;              /* total length of tube (cm) */
tomwalters@0:   double diameter ;            /* diameter of tube  (cm2) */
tomwalters@0:   double att_factor ;          /* attn. constant for backward/forward waves (1/cm) */ 
tomwalters@0:   } ;
tomwalters@0: 
tomwalters@0: /***** externals *****/
tomwalters@0: 
tomwalters@0: extern Source Ear() ;
tomwalters@0: 
tomwalters@0: #endif
tomwalters@0: