Can someone explain to me how this works?

Discussion in 'General Questions' started by grinningremlin, Feb 15, 2013.

  1. grinningremlin

    grinningremlin Active Member

    Bought a "cigar" type silencer from gopedepot for a Tanaka.I can see within it has holes on the inside, I assume wrapped with fiberglass packing, but I can see straight through it.How does this make anything quieter?Is the exhaust pushing so hard half the force goes through the packing, I don't get it.

  2. wheelbender6

    wheelbender6 Well-Known Member

    The holes cause the sound waves to bounce around, interrupting their path. The sound waves that bounce around interfere with the sound waves that would otherwise pass straight through. Mufflers on some of the older lawn mowers are of the same design. You can see through them from end to end.
  3. grinningremlin

    grinningremlin Active Member

    Thanks Wheelbender.That's what I love about this forum, a bunch of living encyclopedias.
  4. jaguar

    jaguar Well-Known Member

    That's the same as the motocross silencers, without any flow restriction. They allow the pressure of each exiting pulse to reduce by expanding into the larger area (thru the holes). Less pressure means less volume of noise.
  5. darwin

    darwin Well-Known Member

    Think of a silencer on the end of a rifle. Bore is straight through also.
  6. jaguar

    jaguar Well-Known Member

    Gun Silencer

    I made one of these. It works fairly good.