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@ManhattanProject @JConline
first of all you need to understand the working of dog's ears.
Unlike humans, whose hearing range is 20 Hz to 20000 Hz dogs can hear as low as 4000 Hz so what
@JConline talked about i.e
amplification : dogs don't need that. Unlike humans, dogs hearing ability aren't enchanced by comtacs.
Coming to second part, cutting the disruptive sound, there are already equipments present in the market that are fit for this role, and it costs much lower than your comtacs.
example:
View attachment 211044
These are special cloths that block loud sound.
If your special forces have andha paisa, sure go for special caliberated comtacs. Train your dogs to get in tune with those devices but practical use of such devices for dogs is zero.
Military dogs are prized for their hearing—but loud noises can be a problem.
www.popularmechanics.com