H - Electricity – 04 – R
Patent
H - Electricity
04
R
172/30, 179/5
H04R 1/42 (2006.01) F01N 1/02 (2006.01) F01N 1/06 (2006.01) G10K 11/178 (2006.01) H04R 3/02 (2006.01)
Patent
CA 2038440
FMC 0217 PUS -12- 89-773 Abstract An active muffler for use in motor vehicles comprises a sensor, an electronic control responsive to the signal generated by the sensor for producing a drive signal delivered to a transducer which emits cancellation pulses phased 180° from the sound pres- sure pulses passing through a conduit, where both front and rear sides of the transducer are acoustical- ly coupled to the conduit to improve the efficiency of the transducer operation. Preferably, the acoustic coupling comprises an enclosed chamber including a port for communicating with the conduit which can be tuned to resonate at predetermined frequencies. When both sides of the transducer are so coupled to the conduit, the transducer has increased efficiency over a broad band of frequencies, and the frequency band can be broadened at the low end as required to accom- modate the frequencies generated by a source of noise. The transducer mounting arrangement according to the present invention is particularly suitable for use in adapting noise cancellation techniques to replace passive mufflers on motor vehicles.
Ford Motor Company Of Canada Limited
Sim & Mcburney
LandOfFree
Active muffler transducer arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Active muffler transducer arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Active muffler transducer arrangement will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-2087148