Research on the design of active noise reduction system for automotive en-gines
Traditional methods of noise reduction in cars tend to be passive,using quieter tyres,power sources,installing soundproofing materials etc.Active noise reduction is a relatively new approach to noise reduction.An active noise reduction device was designed,which was low cost and rear-assembled,easy to remove and retrofit.By using active noise reduction technology(ANC)and principles and existing equipment,the design was made more feasible for implementation.The active noise cancellation device consisted of two main components.The acoustic receiver used a MEMS microphone,which was small,high temperature and high pressure resistant and low cost,while the acoustic amplifier used a high tempera-ture and waterproof speaker from Bright Sound.
NETL
NSTL
万方数据
