作者：焦中兴, 刘威, 何岭松

作者单位：华中科技大学机械科学与工程学院, 湖北 武汉 430074

关键词：声学; 响度; Moore模型; 频谱校正; 倍频程

摘要：

简单介绍了Moore响度模型的计算过程,针对该模型以参数化方式输入信号频谱的特点,提出了直接FFT(快速傅里叶变换)频谱算法、FFT校正频谱算法和1/3倍频程谱算法等3条Moore响度计算路线,分析对比了3种不同算法对典型信号响度计算精度的影响。分析结果表明:对纯音或复合音信号,可采用FFT校正频谱算法或点数为4 096的直接FFT频谱算法计算响度;对带宽较宽的噪声信号,建议采用1/3倍频程谱计算响度。

Three methods for calculating Moore's loudness

JIAO Zhong-xing, LIU Wei, HE Ling-song

School of Mechanical Science and Engineering, Huazhong University of Science and Techonology, Wuhan 430074, China

Abstract: The procedure of Moore's loudness model was briefly introduced using the spectrum parameters of the sound signal as the input of the model. Three methods were proposed to calculate Moore's loudness. They are the FFT spectrum method, the correcting FFT spectrum method and the one-third octave band spectrum method. By calculating loudness of standard signals, the accurate and the efficiency of three methods were analyzed and compared. The implications of the results were discussed. For pure tones and complex tones, the correcting FFT spectrum method or the FFT spectrum method with a FFT length of 4096 sample points are recommended and for broadband noise, the one-third octave band spectrum is recommended.

Keywords: acoustics; loudness; Moore's model; spectrum correction; octave

2012, 38(1): 5-8  收稿日期: 2010-12-20;收到修改稿日期: 2011-2-19

基金项目: 国家自然科学基金项目(50775082);国家863计划项目(2008AA04Z133)

作者简介: 焦中兴(1986-),男,河北石家庄市人,硕士研究生,专业方向为声质量评定与心理声学参数研究。

参考文献

[1] Stevens S S. Procedure for calculating loudness:Mark Ⅵ[J]. The Journal of the Acoustical Society of America, 1961,33(11):1577-1585.
[2] Stevens S S. Perceived level of noise bu mark Ⅶ and decibels[J]. The Journal of the Acoustical Society of America,1972,51(2):575-601.
[3] Fastl H, Zwicker E. Psychoacoustics:fact and models[M]. Berlin Heidelberg:Springer,2007.
[4] ISO 532—1975 Acoustic-method for calculation loudness level[S]. 1975.
[5] Moore B C J, Glasberg B R, Thomas B. A model for the prediction of thresholds, loudness, and partial loudness[J]. J Audio Eng Soc,1997,45(4):224-240.
[6] Glasberg B R, Moore B C J. A revision of zwicker's loudness model[J]. Acta Acustica,1996(82):335-345.
[7] ANSI S3.4—2005 Procedure for the computation of loudness of steady sounds[S]. 2005.
[8] 郑文,陈克安,马元峰. Moore模型与响度计算中的关键问题[J]. 电声技术,2007,31(6):11-16.
[9] 马元峰,陈克安,王娜. Moore响度模型的数值计算方法[J]. 声学技术,2008,27(3):390-395.
[10] 谢明,丁康.频谱分析的校正方法[J]. 振动工程学报,1994,7(2):172-179.
[11] 丁康,江利旗. 离散频谱的能量重心校正法[J]. 振动工程学报,2001,14(3):354-358.