Page 14 - 《应用声学》2022年第6期

第 41 卷 第 6 期 Vol. 41, No. 6
2022 年 11 月 Journal of Applied Acoustics November, 2022

⋄ 研究报告 ⋄

直接辐射式扬声器系统的低频效率计算公式 ∗

陈 睿 沈 勇 † 冯雪磊

(南京大学声学研究所 近代声学教育部重点实验室 南京 210093)

摘要：效率是扬声器系统的重要性能指标，然而常用的标称效率在低频范围并不适用。该文研究直接辐射式
扬声器系统的低频效率，推导了基于 TS 参数的低频效率计算公式。针对封闭式扬声器系统和倒相式扬声器系
统，开展实验验证，结果表明该文提出的计算公式得到的低频效率与实验测量得到的低频效率较为相符。进一
步对比分析低频效率和标称效率，结果表明低频效率能够适用于低频，能准确地展示扬声器系统参数对效率
的影响。利用该文提出的计算公式，有助于进一步优化提升扬声器系统的低频效率。
关键词：扬声器系统效率；直接辐射式扬声器系统；效率提升
中图法分类号: O42 文献标识码: A 文章编号: 1000-310X(2022)06-0860-07
DOI: 10.11684/j.issn.1000-310X.2022.06.002

Calculation formula of low frequency efficiency of direct radiation
loudspeaker system

CHEN Rui SHEN Yong FENG Xuelei

(Key Laboratory of Modern Acoustics, MOE, and Institute of Acoustics, Nanjing University, Nanjing 210093, China)

Abstract: Efficiency is an important performance index of loudspeaker system, while the commonly used
nominal efficiency is not applicable in the low frequency range. This paper discusses the low frequency efficiency
of direct radiation loudspeaker system and deduces the calculation formula of low frequency efficiency based on
TS parameters. Experimental verification is carried out for closed loudspeaker system and vented loudspeaker
system. The results show that the low frequency efficiency obtained by the calculation formula proposed in
this paper is in good agreement with the low-frequency efficiency measured by experiment. The results show
that the low-frequency efficiency can be applied to low-frequency and can accurately show the influence of
loudspeaker system parameters on efficiency. The calculation formula proposed in this paper is helpful to
further optimize and improve the low-frequency efficiency of the loudspeaker system.
Keywords: Loudspeaker system efficiency; Direct radiation loudspeaker system; Efficiency improvement

2021-08-30 收稿; 2021-11-30 定稿
国家重点研发计划项目 (2018YFB1403800)
∗
作者简介: 陈睿 (1996– ), 女, 甘肃兰州人, 硕士研究生, 研究方向: 电声学。
† 通信作者 E-mail: yshen@nju.edu.cn