Active noise reducing seat suitable for express railway business class

Abstract

The invention discloses an active noise reducing seat suitable for an express railway business class. The active noise reducing seat comprises a base, a back, a headrest, reference noise sensors, error microphones, a MIMO active noise reduction controller and two loudspeakers, wherein the reference noise sensors, the error microphones, the MIMO active noise reduction controller and the two loudspeakers are arranged in the moving range of the head of a passenger, on the back and the headrest. According to the active noise reducing seat disclosed by the invention, through a series of irrelative referring acoustic modes, the obtained best noise control mode is high in accuracy and better matched with a noisy mode in the express railway business class; then a target signal is sent according to the best noise control mode, so that the broadband noise reduction effect of noise in the express railway business class is realized, and the noise reduction effect is more obvious; and through continuously adjusting a sampling period, a self-adapting filter order and a convergence factor, a filter weighting coefficient is modified in a self-adapting manner, so that under the premise that the system is stable can be guaranteed, the convergence speed of the system is increased, and the noise control in a broadband is achieved.

Description

technical field [0001] The invention relates to the technical field of noise control, in particular to an active noise reduction seat suitable for high-speed rail business class. Background technique [0002] With the improvement of people's living standards and the rapid development of the rail transportation industry, more and more people choose high-speed rail travel, and their requirements for high-speed rail ride comfort are also increasing. One of the criteria for judging comfort. On the basis of the current noise level in the high-speed rail business class, improving the noise control effect and providing a quieter environment for passengers to rest and sleep has become a relatively popular research in the field of noise control. [0003] Conventional noise control schemes mostly use sound-absorbing structures and materials to achieve a certain noise reduction effect. This passive noise control can effectively reduce high-frequency noise, but the control effect on lo...

AI Technical Summary

Problems solved by technology

[0003] Conventional noise control schemes mostly use sound-absorbing structures and sound-absorbing materials to achieve a certain noise reduction effect. This passive noise control can effectively reduce high-frequency noise, but the control effect on low-frequency noise is relatively poor.

Low-frequency noise can be effectively controlled by means of active noise reduction. The current active noise control scheme can only reduce low-frequency noise in a narrow frequency band, and its application in rail transit trains is also greatly limited.

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