Noise tests III American engine manufacturer Detroit Diesel is field
13th June 1991, Page 8
13th June 1991
Page 8
Page 8, 13th June 1991
— Noise tests III American engine manufacturer Detroit Diesel is field
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testing "electronic mufflers" to reduce noise on truck and bus engines in the US. The system reduces_ noise by electronically producing an equal but opposite sound wave to cancel out. or at least reduce unwanted noise. Computer technology analyses and then reduces the noise. Detroit Diesel is claiming "significant reductions".