Active automobile noise control device

A technology of automotive noise and control devices, which is applied in the direction of sound-emitting devices, instruments, and signal processing, and can solve problems such as difficulty in achieving noise reduction effects

Inactive Publication Date: 2018-05-04
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Now, although active noise control has begun to be applied to the noise control of automobiles, it is difficult to achieve a stable noise reduction effect in the complex noise environment of the car.

Method used

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Embodiment Construction

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] The technical solutions of the present invention will be further described below in conjunction with the embodiments and the accompanying drawings. The embodiment of the invention discloses a vehicle noise active control device such as figure 1 As shown, the vehicle noise active control device includes:

[0023] 2 reference microphon...

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Abstract

The invention discloses an active automobile noise control device. The active automobile noise control device comprises a headrest, two control loudspeakers built in the headrest, four error microphones built in the headrest, two reference microphones, an active noise controller and a peripheral circuit. Compared with the prior art, the active automobile noise control device disclosed by the invention has the advantages of collecting more coherent noise signals by optimizing the multi-channel noise control algorithm, and then generating a stable control signal according to the collected signals, thereby realizing a noise reduction effect in a specific area in the cabin, and the noise reduction effect is more stable.

Description

technical field [0001] The invention relates to the field of noise control, in particular to an active control device for vehicle noise. Background technique [0002] The traditional noise reduction technology (passive noise reduction technology) mainly controls the noise inside the car in two ways. One is to change the structure of the car to reduce resonance from the sound source, and the other is to install sound insulation and sound-absorbing materials in the car to control the noise during the sound transmission process; passive noise reduction is not effective in controlling low-frequency noise, and may Increasing the weight of the car does not meet the requirements of the lightweight design of the car. Therefore, a suitable noise reduction method is particularly important for the development of automobiles. [0003] Active noise reduction uses a controllable sound source to control a specific sound field to reduce sound pressure or energy. Compared with passive noi...

Claims

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Application Information

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IPC IPC(8): H04R3/04G10K11/178
CPCH04R3/04G10K11/178H04R2430/00
Inventor 张高峰刘楚梁崔扬扬
Owner XIANGTAN UNIV
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