The impact of sensor mismatch errors on the robustness of circular directional differential microphone arrays

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-02-14 DOI:10.1016/j.apacoust.2025.110583

Weisong Chen , Zhuo Qian , Xunye Hu , Sensen Cai , Feng Niu , Ping Yang

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引用次数: 0

Abstract

Circular directional differential microphone arrays (CDDMAs) are composed of directional microphones, and the mismatch error of the microphones may lead to a significant degradation in array performance. The effects of the gain and phase mismatch errors of microphones on the mainlobe directivity of first-order and second-order CDDMAs are analyzed theoretically in this paper. The theoretical results are verified by simulation. The results indicate that, for the first-order CDDMAs, similar to the first-order circular differential microphone arrays (CDMAs) which are composed of omnidirectional microphones, the gain errors of directional microphones do not alter the mainlobe direction of the beampattern. However, unlike the CDMAs with omnidirectional microphones, the phase errors of the CDDMAs with directional microphones also do not change the mainlobe direction of the beampattern. For the second-order CDDMAs, both gain and phase errors can cause deviations in the mainlobe direction or even mainlobe orientation reversal. Nevertheless, the CDDMAs exhibit better robustness than that of the CDMAs in terms of beampattern, directivity factor, white noise gain and front-to-back ratio, especially in the low and middle frequency ranges.

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.