Attenuating engine noise using a reverse resonator
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United States of America Patent
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Jul 19, 2016
Grant Date -
Jan 14, 2016
app pub date -
Jul 9, 2014
filing date -
Jul 9, 2014
priority date (Note) -
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Abstract
Techniques involve attenuating noise from engine exhaust from an engine. For example, an apparatus includes a first tube having an input end which receives the engine exhaust from the engine, and an output end which outputs the engine exhaust. The apparatus further includes a second tube which encircles the output end of the first tube. The second tube has an exhaust end through which the engine exhaust outputted by the output end of the first tube is allowed to escape, and a resonator end which is opposite the exhaust end. The apparatus further includes a reverse resonator disposed at the resonator end of the second tube. The reverse resonator defines a reverse resonator chamber and a reverse resonator chamber diameter which is larger than a second tube diameter defined by the second tube.
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