Proceedings of the 11th Convention of the
European Acoustics Association
Forum Acusticum / EuroNoise 2025


Málaga, Spain
June 23 - 26, 2025





Session: A07.06 Modern experimental techniques in aeroacoustics
Date: Wednesday 25 June 2025
Time: 12:20
Title: Application of atmospheric wind filter arrays for acoustic monitoring UAVs
Author(s): Ramesh Raja Subramanyam
Criostoir Gerasch
Stefan Jacob
Pages: 1923-1929
DOI: https://www.doi.org/10.61782/fa.2025.0141
PDF: https://dael.euracoustics.org/confs/fa2025/data/articles/000141.pdf
Conference proceedings
Abstract

The application of Uncrewed Aerial Vehicles (UAVs) in low frequency acoustic measurements is, among other factors, limited by the disturbances induced by atmospheric wind noise. The infrasound sensor networks used in the seismic activity monitoring, consists of a wind filter array that filter the acoustic disturbances caused by the atmospheric turbulence. These arrays function as a spatial filter, eliminating the incoherent noises generated by the wind. In this study we design and test wind filter arrays for their application in a UAV based measurement platform. Different configuration of the wind filters such as the Rosette filter, porous circular pipes and several other derived configurations were studied. The frequency response function of the filters indicated a significant distortion from the acoustic resonance in the filter tube for some designs. Acoustic plane wave theory is used to tune these wind filter arrays for shifting these resonances beyond the frequency range of the measurement. In addition, an investigation is made by coupling arrays of varying dimension to increase the effective frequency range of the filter.