megaphone louder?
#2
megaphones disperse the sound over a wider area
straight pipes project in a more narrow line ( think line-of sight)
this is over simplified, but high frequencies travel more in straight lines and are directional, low frequencies are less directional.
which is why it is easy to track 2 stroke in traffic, but harder to tell which car has the thumping bass system ( until you see the mirrors falling off)
there is no simple answer to your question as it is dependent on the frequency you are concerned with and the positon of the listener- behind, the side, on the bike etc.
and also the surroundings- a flat wall behind will bounce sound right back at the rider
a bike with turndowns will always sound louder to the rider than turn outs/ and exactly the opposite experience for the observer
also factor in any baffing or packing, without which in a megaphone, the exhaust gasses would loose velocity and performance would be affected.
Mike
straight pipes project in a more narrow line ( think line-of sight)
this is over simplified, but high frequencies travel more in straight lines and are directional, low frequencies are less directional.
which is why it is easy to track 2 stroke in traffic, but harder to tell which car has the thumping bass system ( until you see the mirrors falling off)
there is no simple answer to your question as it is dependent on the frequency you are concerned with and the positon of the listener- behind, the side, on the bike etc.
and also the surroundings- a flat wall behind will bounce sound right back at the rider
a bike with turndowns will always sound louder to the rider than turn outs/ and exactly the opposite experience for the observer
also factor in any baffing or packing, without which in a megaphone, the exhaust gasses would loose velocity and performance would be affected.
Mike
Last edited by mkguitar; 02-18-2013 at 11:30 AM.
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RoadKingKamchi
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06-18-2009 08:43 AM