摘要
为改善车内噪声的声品质,在主动噪声均衡器基础上,提出通过设计整形滤波器和自调节系数来建立一种宽带主动声品质均衡器的思想。首先利用烦恼度来设计整形滤波器,用于控制宽带残余噪声的频谱形状并使控制后的残余噪声满足人耳听觉特性。然后设计自调节系数使控制后残余噪声频率特性基本与预设声音频率特性保持一致,并通过声品质检测器更新自调节系数,从而实现声品质的自动调节。最后通过使用不同声压的白噪声信号作为初级噪声信号进行仿真试验。结果表明:控制后的残余噪声频谱形状与整形滤波器频谱特性基本保持一致,不仅使得控制后残余噪声频谱符合人耳听觉特性,而且能够实现声品质自动调节。
To improve the sound quality of in-vehicle noise,a broadband active sound quality equalizer is established by adding a shaping filter and a self-adjusting factor to the active noise equalizer.The shaping filter is used to control the spectral shape of the broadband residual noise,so that the controlled residual noise can satisfy the auditory characteristics of the human’s ear.The self-adjustment coefficient is designed to make the residual noise frequency characteristic after controlling basically consistent with the preset sound frequency characteristic and realize the automatic adjustment of sound quality.Simulation experiments are carried out using white noise signals with different sound pressures as the primary noise signals.These results show that the spectral shape of the residual noise after control is basically consistent with the spectral characteristics of the shaping filter,which not only makes the residual noise spectrum after control conform to the characteristics of human hearing,but also realizes the automatic adjustment of sound quality.
作者
刘植
李之同
崔怀峰
马景涛
王振先
LIU Zhi;LI Zhitong;CUI Huaifeng;MA Jingtao;WANG Zhenxian(School of Mechanical and Automobile Engineering,Ningbo University of Technology,Ningbo 315211,China)
出处
《宁波工程学院学报》
2023年第1期28-32,共5页
Journal of Ningbo University of Technology
基金
宁波市自然科学基金项目(2019A610160)
浙江省大学生科技创新活动计划暨新苗人才计划项目(2022R428A005)。
关键词
主动控制
听觉特性
声品质均衡器
宽带噪声
自调节
active control
auditory characteristics
sound quality equalizer
broadband noise
self-adjustment
