Active noise control system, also known as ANC (Active Noise Control). Its basic principle is that the noise reduction system produces a reverse sound wave equal to the external noise and neutralizes the noise. The reference microphone obtains the reference signal of the noise, generates the control signal after being processed by the data acquisition and the computer (adaptive filtering), and outputs it to the secondary sound source to drive the loudspeaker to produce offset sound to minimize the noise signal at the error microphone.
The Technology Principle
Active Noise Reduction Controller
Active Noise Control System Schematic Diagram
Active Noise Reduction Seat Composition
1. Base, backrest and headrest. 2. Reference Noise Microphone: Set on the backrest and headrest within the moving range of the passenger's head to collect the main noise. 3. Error Microphone: set on the backrest and headrest within the moving range of the passenger's head to collect the residual noise after noise control in the high-speed railway business class.
Software Test Interface
Software Testing Site