Page 33 - 201901

第 38 卷 第 1 期 Vol. 38, No. 1
2019 年 1 月 Journal of Applied Acoustics January, 2019

⋄ 研究报告 ⋄

基于入耳式耳机电阻抗特性的个性化均衡研究 ∗

项京朋 1,2 桑晋秋 1,2 郑成诗 1,2 李晓东 1,2†

(1 中国科学院大学 北京 100049)

(2 中国科学院声学研究所 北京 100190)
摘要 入耳式耳机封闭耳道会大幅改变耳道辐射阻抗，使得耳道内声压产生畸变进而导致头中定位效应。该
文首次通过建模分析耳机与外耳耦合时声负载的变化，建立起耳机电阻抗与个性化耳机 -耳道传递函数的关
系。根据耳机电阻抗设计个性化滤波器以消除传递函数中高 Q 值的共振峰，均衡耳道内声压畸变。主观实验
结果表明，基于耳机电阻抗特性的个性化均衡对于消除头中定位效应有显著作用。
关键词 电阻抗，个性化均衡，头中定位效应，头外声像
中图法分类号: TN64 文献标识码: A 文章编号: 1000-310X(2019)01-0029-010
DOI: 10.11684/j.issn.1000-310X.2019.01.005

Insert earphone impedance and its application to individualized equalization

XIANG Jingpeng 1,2 SANG Jinqiu 1,2 ZHENG Chengshi 1,2 LI Xiaodong 1,2

(1 University of Chinese Academy of Sciences, Beijing 100049, China)
(2 Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China)

Abstract The ear canal radiation impedance changes drastically with earphone blocking the entrance, which
causes unnatural resonances and eventually leads to in-head localization. The relationship between the ear-
phone’s electric impedance and the earphone-to-ear-canal transfer function is first established based on the
modeling of the acoustic load caused by the coupling with ear. Individualized equalization is designed according
to earphone electric impedance to eliminate the high Q value resonance in the ear canal. The results obtained
from subjective tests demonstrate that individual equalization based on the earphone’s electric impedance
results in externalized sound images.
Key words Electric impedance, Individualized equalization, In-head localization, Externalization

2018-03-26 收稿; 2018-05-06 定稿
国家自然科学基金青年科学基金项目 (11504404, 11604362)
∗
作者简介: 项京朋 (1993- ), 男, 北京人, 硕士研究生, 研究方向: 声学, 音频信号处理。
通讯作者 E-mail: lxd@mail.ioa.ac.cn
†