Active control of exhaust noise using an air horn

Title
Active control of exhaust noise using an air horn
Author
박준홍
Keywords
Active noise control; Acoustic noise; Acoustic radiators; High temperature acoustics; Radiation monitoring
Issue Date
2012-08
Publisher
41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012; New York, NY; United States; 19 August 2012 through 22 August 2012; Code 98805
Citation
The Journal of the Acoustical Society of America, Vol. 131, No. 4, 3436p ~ 3436p
Abstract
The noise generated by internal combustion engine is reduced by passive muffling systems. For the passive muffling system, its performance significantly degrades especially when multiple low frequency tonal components exist in the flow. The tonal components occur from explosion process of the engine, and radiates as a monopole from the outlet. In this study, active noise cancelation using FxLMS algorithm is proposed to reduce the exhaust engine noise. Air-horn which is capable of being operated at high temperatures is proposed for cancelation of the radiated noise. The vibration input the diaphragm of the air-horn allowed the active control of the frequency and phase of the radiated sound. The FxLMS algorithm was used to actively control the sound radiation from the air-horn to achieve cancelation of the noise from the muffler. The sound radiation from the air-horn induces dipole-like noise radiation from the exhaust system, and significantly reduced the radiated sound power.
URI
http://dx.doi.org/10.1121/1.4708888http://hdl.handle.net/20.500.11754/41229
ISBN
978-162748560-9
ISSN
0001-4966; 1520-8524
DOI
10.1121/1.4708888
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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