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http://dx.doi.org/10.5050/KSNVE.2016.26.5.501

Localization of Moving Sound Source Using Various Beamforming Methods  

Go, Yeong-Ju (Department of Aerospace Engineering, Chungnam National University)
Lee, Jaehyung (Department of Aerospace Engineering, Chungnam National University)
Choi, Jong-Soo (Department of Aerospace Engineering, Chungnam National University)
Ha, Jae-Hyoun (Agency for Defense Development)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.26, no.5, 2016 , pp. 501-510 More about this Journal
Abstract
Capabilities of several beamforming techniques are compared for estimating the position of a moving source. Beamforming has enabled to widen our perspective of aeroacoustics in wind tunnel experiments and has provided useful approach in array measurements. Meanwhile beamforming techniques have been developed in a way to improve estimation accuracy and to save ing effort at the same time. In order to achieve reasonable outcome from aeroacoustic measurement, it is important to identify the spectral characteristics of source and to select an appropriate beamformer. Though aeroacoustic sources normally generates broadband noises, many array signal processing have been focused on narrowband processing which makes calculation numerically efficient. However, calculation in frequency-domain requires selection of single frequency of interest which affects spatial resolution and sidelobe level as a consequence. To be able to localize broadband noise source, it is proposed to use broadband beamforming. The formulas implements the deletion of diagonal term from cross spectral matrix. In this study, trajectory of flying source emitting broadband noise was simulated and several beamformers are applied.
Keywords
Beamforming Method; Time-domain Beamforming; Frequency Beamforming; Narrowband Beamforming; Broadband Beamforming;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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