Page 164 - 《应用声学》2022年第6期
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第 41 卷 第 6 期                                                                       Vol. 41, No. 6
             2022 年 11 月                         Journal of Applied Acoustics                 November, 2022

             ⋄ 经验交流 ⋄



                                         抑制风噪装置的实验





                                                   吴 睿     †   金向锋


                                           (惠州迪芬尼声学科技股份有限公司          惠州   516000)

                摘要：该文基于风噪原理提出了一种抗风噪结构设计，来抑制传声器拾取风噪。该设计由渐变管道和填充泡
                棉的腔体两部分组成。渐变管道用来降低气流流速，填充泡棉的腔体用来充当声屏障。有限元仿真验证了渐
                变管道降低流速的能力，风噪实验证明了该设计能有效地抑制风噪。讨论了关键因素对该结构抗风噪能力的
                影响：大的腔体、小的渐变管道等效直径和高的泡棉密度，都有利于抗风噪效果。最后，基于声传输线和等效电
                路理论，建立了声波经过该抗风噪结构的传递损失模型。基于该模型和高频不失真条件，提出了抗风噪结构的
                尺寸设计指标。
                关键词：传声器；气流；风噪；抗风噪结构
                中图法分类号: X121           文献标识码: A          文章编号: 1000-310X(2022)06-1010-06
                DOI: 10.11684/j.issn.1000-310X.2022.06.020


                           Experiment on a structure for suppressing the wind noise

                                                 WU Rui JIN Xiangfeng

                                (Tymphany Acoustic Technology Huizhou Co., Ltd., Huizhou 516000, China)

                 Abstract: Based on the principle of the wind noise, an anti-wind noise structure design is proposed to suppress
                 the wind noise picked up by the transducer. The design consists of a gradient pipe and a cavity filled with
                 foam. The gradient pipe is used to reduce the speed of the air flow, and the cavity filled with foam is used
                 as a sound barrier. Finite element simulation verifies the ability of gradient pipeline reducing velocity, and
                 experiments show that the designed structure can effectively suppress the wind noise. Besides, the influence
                 factors are discussed: large cavity, small pipe diameter and high foam density are helpful to the anti-wind noise
                 performance. Finally, based on the sound transmission line and equivalent circuit theory, the transmission loss
                 model of sound wave passing through the structure is established. Based on the model and the condition of
                 high frequency distortion, the size requirements of the structure are proposed.
                 Keywords: Transducer; Wind noise; Air flow; Anti-wind noise structure



                                                               原理为对系统中的前馈传声器和后馈传声器拾
             0 引言
                                                               取到的噪声进行数字信号处理 (Digital signal pro-
                 随着主动降噪 (Active noise control, ANC) 技          cessing, DSP)，用处理后的信号激励扬声器，使其
             术的成熟，真无线立体声 (True wireless stereo,                发出反相的噪声来实现降噪。大多数环境噪声会
             TWS)ANC 耳机成为研究热点            [1−3] 。ANC 的基本        在该机理下被降低，但是在风速较大的环境中ANC



             2021-10-07 收稿; 2022-02-16 定稿
             作者简介: 吴睿 (1991– ), 男, 陕西汉中人, 硕士, 电声工程师, 研究方向: 电声与噪声。
              通信作者 E-mail: ruiwu1@outlook.com
             †
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