Application of spectral immission directivity for long-term environmental noise measurements

Murovec, Jure (avtor), Hvastja, Andrej (avtor), Cerkovnik, Nejc (avtor), Prezelj, Jurij (avtor)

Environmental noise pollution is a growing problem, especially in urban areas where multiple noise sources contribute to a complex acoustic environment. Conventional noise measurement techniques often struggle to distinguish individual sources and their contribution to the overall noise level, requiring extensive post-processing. This study introduces spectral immission directivity (SID), an advanced approach that integrates spatial and spectral data to improve the assessment of environmental noise. SID enables the identification of dominant noise sources in real time by capturing both their directional and frequency characteristics. The proposed method has been evaluated through numerical simulations and controlled experiments in an anechoic chamber, demonstrating its ability to distinguish individual noise sources and their spectral contributions with high accuracy. By using directional frequency analysis, SID provides a more detailed representation of the acoustic scene while minimizing the need for manual classification. The results show that SID increases measurement accuracy, especially in environments where multiple sources overlap in terms of operating times and frequency content. The results suggest that SID can be a powerful tool for environmental noise monitoring that complements existing methods, from standardized compliance measurements to classification models and smart urban monitoring networks.

• Jezik: Angleški jezik
• Ključne besede: spectral immission directivity, long-term environmental noise measurements, microphone array, sound source localization, spatial filtering, 1/3 octave frequency analysis
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: 15 str.
• Številčenje: Vol. 239, art. 110848
• PID: 20.500.12556/RUL-169444
• UDK: 534
• ISSN pri članku: 0003-682X
• DOI: 10.1016/j.apacoust.2025.110848
• COBISS.SI-ID: 237558019
• Datum objave v RUL: 28.05.2025

Gradivo je del revije

• Naslov: Applied acoustics
• Skrajšan naslov: Appl. acoust.
• Založnik: Elsevier
• ISSN: 0003-682X
• COBISS.SI-ID: 24982016

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.