Model decomposition via optical delay estimation using the camera tracking in an active noise control system for creation of a movable quiet zone

verfasst von

Sven Höber, Christian Pape, Eduard Reithmeier

Abstract

This article presents an adaptive control system for active local reduction of broadband noise at moving locations, using the camera tracking for path model decomposition to reduce the filter lengths. To enable a dynamic placement of local quiet zones with respect to a moving target, previous works proposed the combination of the remote microphone technique with a camera-based target tracking. The estimated 3-D coordinates are used at run time for a dynamic update of the transfer paths models, which correspond to virtual microphones at predetermined locations. Nevertheless, whereas current applications like headrests feature only short distances to the target, the considered ANC system aims at larger ranges for the moving quiet zone, resulting in long impulse responses and high delays in the transfer paths. To reduce the associated model lengths, this work evaluates a decomposed identification stage that takes advantage of the camera-tracking system by estimating the acoustic path delays optically. In experiments, this method is shown to be superior to signal processing-based approaches like cross-correlation and thus enables an accurate separation of the delays. Eventually, the validation of the broadband ANC performance at a moving microphone shows that the quiet zone could be tracked over a range of 0.8 m, while using only few transfer path models and saving over 100 coefficients due to the proposed decomposition.

Organisationseinheit(en)

Institut für Mess- und Regelungstechnik

Typ

Artikel

Journal

Noise Control Engineering Journal

Band

68

Seiten

247-256

Anzahl der Seiten

10

ISSN

0736-2501

Publikationsdatum

01.07.2020

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Bauwesen, Fahrzeugbau, Luft- und Raumfahrttechnik, Akustik und Ultraschall, Maschinenbau, Öffentliche Gesundheit, Umwelt- und Arbeitsmedizin, Wirtschaftsingenieurwesen und Fertigungstechnik

Ziele für nachhaltige Entwicklung

SDG 3 – Gute Gesundheit und Wohlergehen

Elektronische Version(en)

https://doi.org/10.3397/1/376821 (Zugang: Geschlossen)