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Originally Posted by Jhereg
Racerboy, the depth really does not change the propagation of the sound(range) as usually our sub is being modeled as in the surface duct above the thermal layer.
The sound arrives either direct path or thru a combination of ducting and reflection, however if you go below the layer there is attenuation to deal with and areas that are no longer in the path of sounds generated on the surface.
I do not know if it is possible to realistically model the layer and belows effects on the sounds propagation. Heck below the surface duct you can have a deep sound channel in which the sound can carry for thousands of miles......  . |
Just from examining the SH3.sdl file they (developers) made provisions for a min radius and max radius the sound can be heard. From my testing it appears that the min range is the range at which the sound 'volume' starts to diminish in strength. Max range being the maximum range at which the sound isn't heard anymore. There is a doppler factor in there but I'm not sure what it's purpose is or what it does as I haven't found an entry that uses it (has a value other than 0h in it). They also made provisions for pitch and pitch variance and volume variance to add some randomness to the sounds.
EDIT: the only objects that use this doppler factor are airplanes and the shell noises you hear in the air
Can you hear airplanes (their engines and all) from underwater?