[LRSLA]

I am not familiar with the specifics of that part of the
NH exhaust regs.

I will forward that switched mufflers work well in areas that
have large bodies of open water to run in. Quiet the exhaust
in proximity to land and then open up two to three miles out.

Switchable exhaust have been in effect outlawed.
Boats in the past would pass the noise tests done by the
Wardens and then run the rest of the day with cutouts engaged.
In the end boats running on inland lakes will have to muffle their
craft to legal levels.

In Maine there isn't such a thing as a legal switchable exhaust any more.
Boats in Maine must meet the 95db and the 75db limits with and with out
cutouts in place. Since there is no way for a water craft to meet the regs
with the exhaust bypassed, cutouts are in essence now illegal in Maine.

Noise is subjective to a point. That point is when it impacts another
person. At that point of impact noise becomes an irritant and a health
issue. There really is no debate about the effects of noise on health.
Noise , sound is now being utilized by the armed forces as a method of
disabling combatants.

During the last three years I have studied sound dynamics and noise
measurement extensively. Our world becomes noisier every year.

I will not be posting for three days.