The invention discloses a rail transit sound insulation device for reducing noise in a train in the technical field of train noise reduction. The rail transit sound insulation device comprises a seat, a plurality of sound insulation assemblies and an active noise reduction assembly. The sound insulation assemblies are installed on the inner wall of the compartment. Each sound insulation assembly is composed of a three-layer structure and used for reducing noise outside the automobile from being transmitted into the automobile. The active noise reduction assembly is mounted at a headrest of the seat; the active noise reduction assembly is used for emitting noise reduction sound waves with the same amplitude and opposite phase as the environmental noise. The audio acquisition module is used for acquiring environment noise and residual noise in a vehicle; the control module processes the noise signal based on the in-vehicle environment noise and the residual noise, and sends a noise reduction driving signal to the audio output module; the audio output module emits noise reduction sound waves to realize sound field superposition with a noise source so as to achieve a noise reduction effect; the sound insulation assembly is divided into three layers, the effective sound absorption effect on noise outside the automobile can be achieved, and the noise outside the automobile is prevented from being transmitted into the automobile; passive noise reduction and active noise reduction are combined, and a good noise reduction effect is achieved.
本发明公开了列车降噪技术领域的一种用于降低车内噪声轨道交通隔音装置,包括座椅、若干隔音组件和主动降噪组件;隔音组件均安装在车厢内壁;隔音组件均由三层结构组成,用于减少车外噪声传入车内;主动降噪组件安装在座椅头枕处;主动降噪组件用于发出与环境噪声幅值相同、相位相反的降噪声波。通过音频采集模块对车内环境噪声和残余噪声进行采集;控制模块基于车内环境噪声和残余噪声对噪声信号进行处理,发出降噪驱动信号至音频输出模块;音频输出模块发出降噪声波,与噪声源实现声场叠加达到降噪效果;并将隔音组件设为三层,可对车外噪声起到有效的吸声作用,减少车外噪声传入车内;将被动降噪与主动降噪相结合,实现较好的降噪效果。
Rail transit sound insulation device for reducing noise in vehicle
一种用于降低车内噪声轨道交通隔音装置
30.04.2024
Patent
Elektronische Ressource
Chinesisch
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