Abstract
The present study focuses on the spatial characteristics of the sound pressure level (SPL) generated by a circular piston (a circular-shaped acoustic transducer or loudspeaker). It presents a short theoretical review to aid inunderstanding the primary sound field characteristic – acoustic pressure – as a function of time, frequency, directivity angle, and distance from the source. The study introduces a simple and practical criterion for determining the near- and far-field boundary along the axis of the circular piston as a function of frequency. This criterion is validated through theoretical analysis and experimental measurements. Overall, the results show the influence of circular piston parameters on the SPL spatial distribution.
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Authors and Affiliations
Iliev Iliyan Yordanov
1
ORCID:
Karaivanov Hristo Zhivomirov
2
ORCID:
- Department of Information Technology, Nikola Vaptsarov Naval Academy Varna, Bulgaria
- Department of Theory of Electrical Engineering and Measurements, Technical University of Varna