Electronics - Making tailpipe music

摘要

Engineering the tailpipe sound of an automobile has a long tradition. To date, mechanical devices such as flaps and/or alternate pathways in the exhaust system have served to give a car its brand-specific sound. Eberspacher, an exhaust-system and heating-solution supplier, has now demonstrated an electronic way of actively engineering the tailpipe sound. Named active sound system, this solution can muffle the tailpipe noise by up to 20 dB, can make a diesel sound like a sporty gasoline engine, and could give a tiny, downsized gasoline engine the beefy sound of a much bigger engine. Or, it can make sure that a nearly silent all-electric vehicle can be heard by pedestrians.