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A low-frequency multiple-band sound insulator without blocking ventilation along a pipe

Authors :
Zi-jian Zhou
Wei Ao
Li Fan
Shu-yi Zhang
Li-ping Cheng
Xiao-dong Xu
Jin-yu Zhao
Hui Zhang
Source :
Scientific reports. 12(1)
Publication Year :
2021

Abstract

It is challenging to insulate sound transmission in low frequency-bands without blocking the air flow in a pipe. In this work, a small and light membrane-based cubic sound insulator is created to block acoustic waves in multiple low frequency-bands from 200 to 800 Hz in pipes. Due to distinct vibration modes of the membrane-type faces of the insulator and co-action of acoustic waves transmitting along different paths, large sound attenuation is achieved in multiple frequency-bands, and the maximum transmission loss reaches 25 dB. Furthermore, because the sound insulator with a deep subwavelength size is smaller than the cross-sectional area of the pipe, it does not block ventilation along the pipe.

Subjects

Subjects :
Multidisciplinary

Details

ISSN :
20452322
Volume :
12
Issue :
1
Database :
OpenAIRE
Journal :
Scientific reports
Accession number :
edsair.doi.dedup.....57cc7e3323a0cfc2ebde1f95dce03393