Journal of South China University of Technology (Natural Science Edition) ›› 2018, Vol. 46 ›› Issue (3): 119-126.doi: 10.3969/j.issn.1000-565X.2018.03.017

• Physics • Previous Articles     Next Articles

Influence of the Number of Loudspeakers on Sound
Pressure Error for Ambisonics Ｒeproduction
 

 JIANG Jianliang1 XIE Bosun1， 2 MAI Haiming1 ＲAO Dan1 LIU Yang1   

  1.  (1． School of Physics and Optoeletronics∥ Acoustic Lab，South China University of Technology，Guangzhou 510640， Guangdong，China; 2． State Key Laboratory of Subtropical Building Science，South China University of Technology， Guangzhou 510640，Guangdong，China
  • Received:2017-05-03 Revised:2017-11-17 Online:2018-03-25 Published:2018-03-01
  • Contact: 谢菠荪(1960-)，男，教授，主要从事电声学和心理声学研究 E-mail:phbsxie@scut.edu.cn
  • About author:江建亮(1990-)，男，博士生，主要从事电声系统和声频信号处理研究
  • Supported by:
     Supported by the National Natural Science Foundation of China(11674105) 

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Abstract:  As analysis on freefield pressure error and binaural pressure error in Ambisonics reproduction yields different results，and the results from binaural pressure error are closer to those of auditory perception． In this work，the influence of the number of loudspeakers on the pressure error in Ambisonics reproduction is evaluated by analyzing the binaural pressure error． The results indicate that，near the frequency limit given by Shannon-Nyquist spatial sample theorem，increasing the number of loudspeakers from low limit L2 to (L + 1)2 or (L + 2)2 reduces the error in reproduction effectively． Increasing the number of loudspeakers to more than (L +2)2 or increasing frequency to higher range，however，makes the relationship between the binaural pressure error and the number of loudspeaker complicated． The results of this work revise the conclusion of some previous work． 

Key words: Ambisonics, sound pressure error, number of loudspeaker, reproduction

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