This is a good idea, and others have suggested similar. Hopefully it’ll get implemented someday.
Two things:
1- Suggestions should be posted to problems and support. GF staff doesn’t read all topics, but they read all of P&S. You might want to copy and paste this into a new topic in P&S to be sure it’s seen.
2- it’s a bit off topic but:
I totally understand. One thing I did that cut the high pitch down a great deal was install insulated duct on the exhaust. There’s more about it here: