Siemens applies sound idea

Miel, Rhoda
November 2000
Automotive News;11/20/2000, Vol. 75 Issue 5904, p22Y
Trade Publication
Reports on the Siemens Automotive Corp.'s development of hollow resonators within the manifold, a reedlike opening that can eliminate an unwanted rumble in an automobile engine's roar by altering the way air flows through the piece. Failure of lightweight plastics to absorb noise like metal; Cost per resonator; Seimen's study of ways to use electronics to replace the molded resonators.


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