Quote:
Originally Posted by DrMilton
So, does that mean that you can pick up that first 50Hz no matter which side of the layer you are...?
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Maybe. It still depends on the usual suspects (water depth, sound speed profile, source depth, target depth, bottom composition..). It's just that unless the sonic layer depth is
really deep, a 50Hz signal not going to get trapped in the surface duct the same way a 5000Hz signal might.