@inproceedings{e489d0b8d538406eafb5cdc3b6a875d4,
title = "High-frequency silencer concepts",
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.",
keywords = "Helicoid, Herschel-Quincke, Micro perforated, Silencer",
author = "Jukka Tanttari and Seppo Rantala and Antti Hynninen and Timo Murtonen",
note = "Publisher Copyright: {\textcopyright} {"}Advances in Acoustics, Noise and Vibration - 2021{"} Proceedings of the 27th International Congress on Sound and Vibration, ICSV 2021. All rights reserved.; 27th International Congress on Sound and Vibration : Advances in Acoustics, Noise and Vibration – 2021, ICSV27 ; Conference date: 11-07-2021 Through 16-07-2021",
year = "2021",
language = "English",
series = "Proceedings of the International Congress on Sound and Vibration",
publisher = "Silesian University Press",
editor = "Eleonora Carletti and Malcolm Crocker and Marek Pawelczyk and Jiri Tuma",
booktitle = "Advances in Acoustics, Noise and Vibration - 2021",
}