IJRME – Volume 4 Issue 3 Paper 1


Author’s Name :  Dayanand Jadhav

Volume 04 Issue 03  Year 2017  ISSN No:  2349-3860  Page no: 1-3



Most recently, automotive engineers have been experimenting with electronic noise suppression muffler. A sound pressure wave, 180 degree out of phase, is generated by an electronic device to cancel out a similar sound wave generated by the engine. It is an effective way of cancelling noise without restricting the flow. Unfortunately, it is too costly and currently impractical for most of today’s engines. However, out of phase sound wave cancellation is the best technology so far to control engine noise. Now-a-days, this 180 degree phase sound is created within the engine muffler by reflecting the out-going sound waves. This reflected sound is used to attenuate the main noise. This procedure is called reflective noise cancellation system. Using a resonator sometimes does this.


Automotive, Muffler, Analyzing, Transfer, Matrix etc.,


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