Hello,
I'm new to this forum.  Pardon me if questions are not addressed or if this
information is covered elsewhere.

Are rotary engines quieter than Lyc/Cont. aircraft engines of comparable
power?

I know Curtiss Wright did something on quieter rotary engines?

Thank you,
Troy Bentz

In some cases yes. Depends on the muffler. They do have about
twice the kinetic energy in the exhaust un-muffled but that
is a huge advantage for turbo compound applications.

Paul Lamar