"Jose" wrote

One can fly anywhere. One can only commune with the grand canyon in
silence at the grand canyon. So, flying should be restricted, by your
comment above.

It seems as though you are in favor of being able to view the canyon from a
certain perspective; backpacking or hiking in your case.

Another way to do view the canyon is from the river, on a boat or raft.

Another is by air. You can certainly gain a perspective of the canyon by
air, that can not be achieved any other way. Eliminating viewing the grand
canyon by air is eliminating one perspective of viewing the grand canyon.

It would be just as wrong as eliminating the view from the river. Not fair,
I think.

Restrict the air routes, and altitude, and make sure there are areas that
will not be touched by the sound, but don't eliminate the wonderful
perspective that viewing the grand canyon by air provides.
--
Jim in NC