音频注入下的飞机舱内噪声烦恼感抑制与评价  

Annoyance Suppression and Evaluation of Aircraft Cabin Noise Based on Audio Injection Approach

作　　者：叶睿 陈克安[1] 闫靓[1] 田旭华 YE Rui;CHEN Kean;YAN Liang;TIAN Xuhua(School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]西北工业大学航海学院,西安710072

出　　处：《噪声与振动控制》2021年第6期141-148,共8页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(12074316)。

摘　　要：飞机舱内噪声令人感到烦恼,影响乘坐舒适性。传统的飞机舱内噪声控制方法包括无源降噪和有源降噪两种方式,它们都是以降低声能量为目标的“减法”策略。然而,此类策略存在代价大、实施困难、效果有限等问题。为此,采取基于听觉感知的“加法”策略—音频注入法。首先,人为选择合适调控声注入到飞机舱内噪声中,降低其烦恼感,然后进一步优化调控声参数,使调控声的烦恼感抑制效果更加显著。主观实验结果表明,音频注入法能够降低舱内噪声的烦恼感,最合适信噪比为+9 dB;改变风声与舱内噪声的带宽重叠率δ无法增强风声的烦恼感抑制作用;在自然声中的风声基础上,将风声信号的功率谱斜率改为-3 dB/倍频程时,风声对舱内噪声的烦恼感抑制作用更加显著。Aircraft cabin noise is annoying and affects the comfort of passengers.Traditional aircraft cabin noise control mainly includes passive and active noise control methods,both of them belong to the“subtraction”strategy aiming at sound energy reduction.Such a strategy has several drawbacks such as high cost,difficulty in implementation,and limited performance effect.In this paper,an“addition”strategy based on auditory perception,called audio injection approach,is proposed and adopted to reduce the annoyance of aircraft cabin noise.Firstly,the adjustable sound,which is capable to reduce the annoyance of cabin noise,are chosen and injected to the cabin noise.Then additional parameter control of the injected adjustable sound is conducted to enhance the annoyance suppression effect.The subjective experiment results show that the audio injection approach can effectively reduce the annoyance of cabin noise and the optimal SNR is+9 dB.Changing the bandwidth overlap rateδof wind sound and cabin noise cannot improve the suppression performance of wind sound.However,when the power spectrum slope of wind sound is changed to-3 dB/octave,the suppression performance of wind sound to the annoyance of the cabin noise is significant.

关 键 词：声学 音频注入法 声掩蔽 飞机舱内噪声 烦恼度 功率谱斜率 

分 类 号：O422.8[理学—声学] B845.2[理学—物理]