Leak transmission characteristic of slit-shaped apertures and effect of porous type absorption on reducing propagating sound

Takumi Asakura, Shinichi Sakamoto, Yuu Sakimoto, Fumiaki Satoh, Hideki Tachibana

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The leak transmission characteristics of slit-shaped apertures were investigated through wave-based numerical analysis and a full-scale model experiment to determine the effects of sound absorption treatment inside the narrow apertures. The 2-dimensional sound field under investigation was divided into two spaces, the source side and the receiving side, by a rigid wall of 100nm thickness with a narrow aperture in its center part. The sound insulation performance of the separation wall between the two rooms was found to be inferior to that of the aperture, such that the flanking sound from the separation wall affects measurements results. The results show that the sound insulation performance is deteriorated in the frequency range higher than 315Hz. The sound insulation performance is also found to improve by 7dB to 15dB frequencies between 2KHz and 5KHz.

Original languageEnglish
Pages (from-to)147-150
Number of pages4
JournalAcoustical Science and Technology
Volume30
Issue number2
DOIs
Publication statusPublished - 2009

Keywords

  • FDTD method
  • Porous type absorption
  • Slit-shaped aperture
  • Sound transmission loss

Fingerprint

Dive into the research topics of 'Leak transmission characteristic of slit-shaped apertures and effect of porous type absorption on reducing propagating sound'. Together they form a unique fingerprint.

Cite this