High-frequency silencer concepts

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

Broad frequency band noise from air exchange systems can cause strong annoyance. Usually, reactive silencer solutions are designed to attenuate noise in low and mid frequency range, whereas resistive materials are used in the silencers in order to absorb sound in the higher frequencies. Wool and fiber based resistive materials have limited lifetime and one major problem with these materials is development of brittleness. In this paper, completely solid structures based on Herschel-Quincke tubes (HQ-tubes) and micro perforated plates (MPPs) are investigated. A HQ-tube dimensioning tool based on optimization algorithms is developed. Commercially available aluminium MPPs are combined with additively manufactured (AM) silencer casing modules and the prototypes are tested in an internal combustion engine (IC-engine) intake system.
Original languageEnglish
Title of host publicationAdvances in Acoustics, Noise and Vibration - 2021
Subtitle of host publicationProceedings of the 27th International Congress on Sound and Vibration, ICSV 2021
EditorsEleonora Carletti, Malcolm Crocker, Marek Pawelczyk, Jiri Tuma
Place of PublicationGliwice
Number of pages8
ISBN (Electronic)978-83-7880-799-5
Publication statusPublished - 2021
MoE publication typeA4 Article in a conference publication
Event27th International Congress on Sound and Vibration: Advances in Acoustics, Noise and Vibration – 2021 - Virtual
Duration: 11 Jul 202116 Jul 2021

Publication series

SeriesProceedings of the International Congress on Sound and Vibration
Volume27
ISSN2329-3675

Conference

Conference27th International Congress on Sound and Vibration
Abbreviated titleICSV27
Period11/07/2116/07/21
OtherOneline

Keywords

  • Helicoid
  • Herschel-Quincke
  • Micro perforated
  • Silencer

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