Kocsis, Bálint and Horváth, Csaba (2025) A theoretical study of diameter constraints in circular microphone array beamforming. In: NVHH 2025 | International Conference for Acoustic and Vibration Engineers, 2025.10.08-10, Balatonalmádi, Magyarország.
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Abstract
Acoustic microphone arrays and beamforming techniques are widely used for the analysis of rotating noise sources, such as those in turbomachinery. In this study, a circular microphone array is employed to investigate these sources, with a focus on the fundamental constraints of the measurement setup. The interdependent relationship between array diameter and measurement distance is examined, defining a theoretical measurement range. Two key limitations – spatial resolution and spatial aliasing – are identified, and practical formulas are derived to estimate the array diameter range for a given distance. These principles are demonstrated through a simple test case.
| Item Type: | Conference or Workshop Item (Paper) |
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| Subjects: | T Technology / alkalmazott, műszaki tudományok > TJ Mechanical engineering and machinery / gépészmérnöki tudományok |
| Depositing User: | Dr. Csaba Horváth |
| Date Deposited: | 21 Sep 2026 06:42 |
| Last Modified: | 21 Sep 2026 06:42 |
| URI: | https://real.mtak.hu/id/eprint/246841 |
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