Page 71 - 《应用声学》2023年第1期

第 42 卷 第 1 期 Vol. 42, No. 1
2023 年 1 月 Journal of Applied Acoustics January, 2023

⋄ 研究报告 ⋄

Mel频率倒谱系数平滑的耳机均衡 ∗

李光炬 1,2† 罗平展 3 钱 鹏 1 甘维明 1 邢 锰 1

(1 中国科学院声学研究所南海研究站 海口 570105)
(2 中国科学院噪声与振动重点实验室 北京 100190)
(3 哈曼科技 (深圳) 有限公司 深圳 518067)
摘要：适当均衡耳机到鼓膜的传递函数可有效提高耳机声重放效果。耳廓与耳道滤波效应引起的幅度峰谷有
助于人耳听觉感知，以平直幅频响应为目标的幅度均衡无法保持适当的峰谷。该文提出了基于 roex 滤波器与
Mel 频率倒谱系数的耳机到鼓膜的传递函数平滑方法，用于模拟人耳听觉感知特性和平滑耳机到鼓膜的传递
函数，使均衡后的幅频响应保持相应的峰谷，避免了幅度峰谷过渡均衡。实验结果表明，进行耳机到鼓膜的传
递函数平滑的幅度均衡对提高耳机的音色有显著作用，基于 Mel 频率倒谱系数平滑的幅度均衡对提高耳机的
音色最为显著。
关键词：耳机到鼓膜的传递函数；Mel 频率倒谱系数；平滑；均衡；耳机声重放
中图法分类号: TN64 文献标识码: A 文章编号: 1000-310X(2023)01-0067-09
DOI: 10.11684/j.issn.1000-310X.2023.01.009

MFCC-based smoothing for equalization of headphone-to-eardrum
transfer function

LI Guangju 1,2 LUO Pingzhan 3 QIAN Peng 1 GAN Weiming 1 XING Meng 1
(1 Haikou Branch, Institute of Acoustics, Chinese Academy of Sciences, Haikou 570105, China)
(2 Key Laboratory of Noise and Vibration Research, Chinese Academy of Sciences, Beijing 100190, China)
(3 Harman Technology Shenzhen Co., Ltd., Shenzhen 518067, China)

Abstract: Binaural headphone reproduction can be improved by appropriate equalization of headphone-to-
eardrum transfer function (HETF). Equalization by direct inversion of HETF targeting at a flat frequency
response cannot keep the beneficial peaks and valleys caused by pinna and ear canal filtering. To simulate
human auditory filtering and smooth HETF, this research proposes two smoothing methods based on roex
filtering and Mel-frequency cepstrum coefficients (MFCC). Thus, the peaks and valleys of the response are
preserved to avoid over equalization. Subjective experiments show that perception of binaural headphone
reproduction can be improved by smoothing HETF, and the performance is most significant by smoothing
method based on MFCC.
Keywords: Headphone-to-eardrum transfer function; Mel-frequency cepstrum coefficients; Smoothing;
Equalization; Headphone reproduction

2021-11-22 收稿; 2022-05-18 定稿
海南省自然科学基金青年基金项目 (619QN265), 海南省科协青年科技英才创新计划项目 (QCXM201809)
∗
作者简介: 李光炬 (1989– ), 男, 海南海口人, 博士, 助理研究员, 研究方向: 语声和声频信号处理。
† 通信作者 E-mail: liguangju@mail.ioa.ac.cn