The effectiveness of an active noise control system with remote microphones technique in a tractor cabin

Titolo Rivista RIVISTA ITALIANA DI ACUSTICA
Autori/Curatori Francesco Mori, Andrea Santoni, Patrizio Fausti, Francesco Pompoli, Pietro Nataletti, Paolo Bonfiglio
Anno di pubblicazione 2025 Fascicolo 2025/1
Lingua Inglese Numero pagine 11 P. 9-19 Dimensione file 0 KB
DOI 10.3280/ria1-2025oa19189
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This paper presents a preliminary study of an active noise control (ANC) system implemented on a tractor cabin. This system employs a multi-channel feedforward configuration, with two error microphones and two control loudspeakers positioned in the cabin and an external reference microphone. Furthermore, the system implements the remote microphone technique (RMT), which allows to place the error microphones at a given distance from the region where the quiet zone is to be created, in this case around a head used for binaural measurements. To evaluate the effectiveness of the ANC system, simulated narrowband and broadband disturbance signals are generated through an acoustic source external to the cabin. Despite a reduction in the performance compared to the case without the RMT, caused by internal modelling of the signals, the developed system demonstrates its potentiality for a real application, where the error microphones cannot be left close to the region where noise has to be cancelled.

Questo articolo mostra uno studio preliminare di un sistema di controllo attivo del rumore (ANC) implementato sulla cabina di un trattore. Tale sistema sfrutta una configurazione feedforward multi-canale, con due microfoni di errore e due altoparlanti di controllo posizionati in cabina e un microfono di riferimento esterno. Inoltre, il sistema impiega la tecnica dei microfoni remoti (RMT), che consente di posizionare i microfoni di errore a una data distanza dalla zona in cui si vuole creare la zona di quiete, in questo caso attorno alla testa di un manichino utilizzato per misure binaurali. Per la valutazione dell’efficacia del sistema ANC vengono generati segnali di disturbo simulati, a banda stretta e a banda larga, attraverso una sorgente acustica posizionata esternamente alla cabina. I risultati mostrano che il sistema sviluppato ha la potenzialità per un’applicazione reale. Nonostante una riduzione delle prestazioni rispetto al caso senza RMT, causata dalla modellazione interna dei segnali, il sistema sviluppato dimostra una potenzialità per un’applicazione reale, dove i microfoni di errore non possono essere lasciati in prossimità della zona in cui si vuole cancellare il rumore.

Parole chiave:; controllo attivo del rumore; trattore; tecnica dei microfoni remoti; feedforward multi-canale; controllo acustico; campo confinato

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Francesco Mori, Andrea Santoni, Patrizio Fausti, Francesco Pompoli, Pietro Nataletti, Paolo Bonfiglio, The effectiveness of an active noise control system with remote microphones technique in a tractor cabin in "RIVISTA ITALIANA DI ACUSTICA" 1/2025, pp 9-19, DOI: 10.3280/ria1-2025oa19189