Analysis For Influence Of Noise And Research Of Active Noise Control System In Tunnel

Noise pollution is a new pollution in the field of traffic especially. In the field of clinical audiology, the traffic noise will not only affect human physically, but also affect the driver’s psychological health. How to improve the environment of Audiology and to get the most ideal audiology environment become an important part of the project in modern traffic and people life.For hearing effects on people and voice overlapping problem research in the tunnel, this paper based on multi-point synchronous acquisition device and the analysis of spectrum characteristics of noise in the tunnel. The scheme of multiple active control equipment is order to solve tunnel local noise, because it is good for the low frequency noise to control and the active control device is easy to install, and no damage to the tunnel structure with a can achieve real-time acquisition of signal. This paper focuses on the analysis of the noise in the tunnel and the control by the multi section active noise control to achieve the aim of improving the auditory environment:(1)By using the multi-point synchronous acquisition device, it can collect the actual tunnel noise. With the analysis of the noise spectrum characteristics, the tunnel noise is mainly concentrated in the 125-500HZ and 700-1200HZ frequency band. Because human ear can threshold,125-500HZ analysis of frequency characteristic of great influence on the people.(2)In the tunnel design of multi section cube structure, active noise control equipment for real-time noise control is the scheme. Active noise control equipment with dual channel bidirectional control technology complete the noise control in local tunnel area.(3)The test experiment of the active noise control system is designed on the free field and the tunnel. By analyzing the time delay of the system, the design of the simulation software is realized. According to the software, the position and the feedback parameters of the active noise equipment are determined.12dB and the improvement of the auditory environment are achieved.