[Ethan Winer[_3_]]

On Sep 2, 12:27 pm, Frank Stearns
wrote:
The 1" 703 behind the diaphragm in the trap is a shock absorber, and moderates
rebound flex of the diaphragm

Yes, this is true for wood panel bass traps. Though the entire
assembly acts as a shock absorber for sound waves. The fiberglass is
equivalent to the viscous damping material in a mechanical shock
absorber. Regardless, the net result is still absorption. There may be
side-effects, such as the wood panel continuing to vibrate after the
sound source goes away. But as long as the sound reflected is less
than the sound arriving at the panel, at least some of the sound has
been absorbed.

--Ethan