I haven't been following the doppler and directional sound stuff, so I apologize if the following is known about and under construction.
I'm running the PLIB branch CVS (last updated last night). Start up with the Bravo or the 787 (and probably others) and switch to an outside view. Move the view to the front of the plane and note the pitch of the engines, then move to the back of the plane and note the pitch. The pitch is higher in front than in back. This seems like it might be caused by doppler, but I suppose there may be another explanation. I don't notice it with the Cessna. If it _is_ a doppler effect, it's wrong. There would be no doppler effect if neither the source nor the ear is moving relative to eachother (as is of course the case when sitting on the runway). The second observation is in flyby mode, and has to do with directional sound. I notice that when the plane is flying almost directly toward the observation point, the sound still comes full from one side, and when the plane passes and heads almost directly away from the observer the sound comes full from the other side. I have even observed the plane coming at a significant angle with the sound coming from the opposite side from what it should. It seems like the stereo effect is being applied in a simplistic way, rather than based on the angle between straight-ahead and where the plane is. -- Hans Fugal Fugal Computing ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
