@ARTICLE{Yordanov_Iliev_Iliyan_Mapping_Online,
 author={Yordanov, Iliev Iliyan and Zhivomirov, Karaivanov Hristo},
 journal={Archives of Acoustics},
 howpublished={online},
 year={Online first},
 publisher={Polish Academy of Sciences, Institute of Fundamental Technological Research, Committee on Acoustics},
 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.},
 title={Mapping Sound Pressure Levels: A Novel Approach to Determining Near-field and Far-field Regions},
 URL={http://ochroma.man.poznan.pl/Content/134604/aoa.2025.153657.pdf},
 doi={10.24425/aoa.2025.153657},
 keywords={sound pressure level (SPL), spatial characteristics, near-field, far-field diffraction pattern, boundaries, criterion},
}