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Construction And Design Of Police Siren
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CHAPTER ONE - [ Total Page(s): 2 ]Pneumatic Siren consists of a rotating disk with holes in it such that
the material between the holes interrupts a flow of air from fixed holes
on the outside of the unit. As the holes in the rotating disk
alternately prevent and allow air to flow it results on alternating
compressed and rarefied air pressure i.e. sound. It consumes large
amount of energy. Electronic Siren incorporate circuits such as
oscillators, modulators and amplifiers it synthesize a selected tone
which is pla ... Continue reading---
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CHAPTER ONE - [ Total Page(s): 2 ]Pneumatic Siren consists of a rotating disk with holes in it such that
the material between the holes interrupts a flow of air from fixed holes
on the outside of the unit. As the holes in the rotating disk
alternately prevent and allow air to flow it results on alternating
compressed and rarefied air pressure i.e. sound. It consumes large
amount of energy. Electronic Siren incorporate circuits such as
oscillators, modulators and amplifiers it synthesize a selected tone
which is pla ... Continue reading---
ABSRACT -- [Total Page(s) 1]
Page 1 of 1
ABSRACT -- [Total Page(s) 1]
Page 1 of 1