Construction of IIR filter for adaptive noise control system of boat noise reduction

Haruki Fukatsu, Kenji Muto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Noise from boats is often loud and can reach apartments or the offices located near Tokyo's canals. The aim of this research is to create quiet spaces in buildings using a sound damping system with adaptive noise control. This system does not use a reference microphone because there is sometimes no place to put it outside a window. We propose a tap length for an infinite impulse response (IIR) filter as an adaptive noise control system for reducing boat noise. In this paper, we analyzed the characteristics of boat noise as well as the adaptive damping filter. We investigated the step size and the tap numbers of the IIR filter to improve the performance of the adaptive noise control system with a digital signal processor. The results showed that boat noise is composed of a peak frequency and some other dominant frequencies caused by the boat engine which produces long continuous noise. We therefore designed the IIR filter to adapt to these frequencies. As a result, the system effectively reduced boat noise in a computer simulation.

Original languageEnglish
Title of host publicationProceedings of the 23rd International Congress on Acoustics
Subtitle of host publicationIntegrating 4th EAA Euroregio 2019
EditorsMartin Ochmann, Vorlander Michael, Janina Fels
PublisherInternational Commission for Acoustics (ICA)
Pages4334-4339
Number of pages6
ISBN (Electronic)9783939296157
DOIs
Publication statusPublished - 2019
Event23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019 - Aachen, Germany
Duration: 2019 Sep 92019 Sep 23

Publication series

NameProceedings of the International Congress on Acoustics
Volume2019-September
ISSN (Print)2226-7808
ISSN (Electronic)2415-1599

Conference

Conference23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019
CountryGermany
CityAachen
Period19/9/919/9/23

Keywords

  • Adaptive noise control
  • Boat noise
  • Digital signal processor
  • Noise investigation

ASJC Scopus subject areas

  • Mechanical Engineering
  • Acoustics and Ultrasonics

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