| Autor: |
Remington, Paul J., Knight, J. Scott, Hanna, Doug, Rowley, Craig |
| Předmět: |
|
| Zdroj: |
Journal of the Acoustical Society of America; Jan2005, Vol. 117 Issue 1, p68-78, 11p, 7 Diagrams, 4 Charts, 7 Graphs |
| Abstrakt: |
A prototype hybrid system consisting of active and passive components for controlling far-field locomotive exhaust noise has been designed, assembled, and tested on a locomotive. The system consisted of a resistive passive silencer for controlling high-frequency broadband noise and a feedforward multiple-input, multiple-output active control system for suppressing low-frequency tonal noise. The active system used ten roof-mounted bandpass speaker enclosures with 2–12-in. speakers per enclosure as actuators, eight roof-mounted electret microphones as residual sensors, and an optical tachometer that sensed locomotive engine speed as a reference sensor. The system was installed on a passenger locomotive and tested in an operating rail yard. Details of the system are described and the near-field and far-field noise reductions are compared against the design goal. © 2005 Acoustical Society of America. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
