So it cut "sound energy" in half??Your early post said 3db change doubles or halves the "intensity" which is sound energy/power I guessso that little plenum(did you post a picture of it??) cut the sound energy IN HALF??- WOWCharliePS Why is it soooo hard to make a silencer if such a "little thing" can cut it in half (I haven't seen it so I am interpreting on your "short space" comment to mean it is small)
MartyInteresting-ESPECIALLY the WHY of WHY the plenum has more effect "backwards" Is it-the barrel or the plenum- BEVELED in any way?I like your guess about it somehow "directing" the sound waves forward-with less of them sorta sloppily curving sideways them backwards.Waves are weird-I just don't understand them- Is there any beveling or other weirdness at the end of the plenum?ThanksCharlie