Howling Cancellation for Active Noise Control with Two Sound Sources

Shinya Kijimoto, Hideo Tanaka, Yoichi Kanemitsu, Koichi Matsuda

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


In the active noise control, a transfer characteristics of an acoustic feedback path has a considerable influence on the stability of the control system. When an acoustic system has a feedback path, the control system often causes unstable behavior called howling. An approach to prevent the howling named directional control sound source (DCSS) is investigated and compared with an ordinary approach (howling canceller) in this paper. This DSCC is composed of two sound sources and a finite impulse response (FIR) filter. Active noise control using the filtered-x LMS (Least-Mean-Square) algorithm is carried out in an L-formed duct model. It is shown that the DCSS approaches prevented the howling effectivery through the experiment.

Original languageEnglish
Pages (from-to)948-953
Number of pages6
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Issue number656
Publication statusPublished - 2001

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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