Method and apparatus for attenuating sound from vibratory screening machines
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United States of America Patent
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Apr 11, 2006
Grant Date -
Oct 21, 2004
app pub date -
Apr 17, 2003
filing date -
Apr 17, 2003
priority date (Note) -
Expired
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Abstract
A method of attenuating the sound emanating from a bank of a plurality of vibrating screens of a plurality of vibrating screening machines including the steps of providing a master pulse of known phase and frequency, comparing the phase and frequency of a plurality of vibrating screens with the known phase and frequency of said master pulse, and adjusting the phase and frequency of said bank of plurality of vibrating screens so that the waveforms produced thereby tend to cancel each other. An apparatus for implementing the method is also disclosed.
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