Reconfigurable origami silencers for tunable and programmable sound attenuation

Hongbin Fang, Xiang Yu, Li Cheng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

9 Citations (Scopus)

Abstract

Recent research has discovered that origami-inspired structures possess great versatility in properties and functionalities. In this research, through an integration of origami geometry and duct acoustics, we reveal that the folding-induced shape reconfiguration of a modular origami silencer could yield great tunability and programmability in sound attenuation. This has been made possible through exploring the kinematics of the folding and the extensibility of the modular origami. Numerical and experimental results indicate that by reconfiguring the silencer via a single degree-of-freedom folding mechanism, the sound attenuation bandwidth can be effectively tuned. Meanwhile, based on a comprehensive understanding on the correlations between the origami geometries and the acoustic characteristics, we exemplify that, by incorporating multiple origami layers in a silencer and by programming their geometries, on-demand sound control can be achieved, e.g., attenuation in the prescribed frequency bands, improved attenuation levels, and broadband attenuations. This proof-of-concept study shows that the proposed folding-based mechanism, along with the modularization design concept, would provide a new way to reconfigure the silencer for acoustic adaptability and inspire new innovation in designing acoustic devices.

Original languageEnglish
Article number095007
JournalSmart Materials and Structures
Volume27
Issue number9
DOIs
Publication statusPublished - 31 Jul 2018

Keywords

  • duct acoustics
  • modular origami
  • programmability
  • tenability
  • transmission loss

ASJC Scopus subject areas

  • Signal Processing
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering

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