Izvorni znanstveni članak

https://doi.org/10.37798/2023724507

Application of Adaptive Finite Focus Beamforming Method for Localization of Low-frequency Transformer Sound

Karlo Petrović orcid.org/0009-0005-4279-8975 ; Končar - Electrical Engineering Institute Ltd., Zagreb, Croatia *
Tomislav Župan ; Končar - Electrical Engineering Institute Ltd., Zagreb, Croatia
Antonio Petošić ; University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, Croatia

* Dopisni autor.

Sažetak

In this paper, the developed adaptive linearly constrained minimum variance finite focus beamforming method is used to increase the accuracy and resolution of low-frequency transformer sound source localization. In the first step, simulations on virtual arrays are conducted to define the array size and compare the influence of three different beamforming algorithms on sound localization accuracy and resolution. In the second step, measurements
of the regulating transformer as a noise source are conducted in the semi-anechoic chamber. A large rectangular microphone array, with 90 microphone positions spaced 0.44 meters apart, is used for that purpose. The developed algorithm is compared with infinite and finite focus beamforming for the localization of total noise and noise at specific noise harmonics.

Ključne riječi

finite focus beamforming; adaptive beamforming; rectangular microphone array; regulating transformer

Hrčak ID:

315534

URI

https://hrcak.srce.hr/315534

Datum izdavanja:

29.2.2024.

Posjeta: 527 *