Increasing low frequency sound attenuation using compounded single layer of sonic crystal

2018 ◽  
Author(s):  
Preeti Gulia ◽  
Arpan Gupta
Keyword(s):  
Low Frequency ◽  
Single Layer ◽  
Sound Attenuation ◽  
Frequency Sound ◽  
Sonic Crystal

Plate Silencers for Broadband Low Frequency Sound Attenuation

2018 ◽  
Vol 104 (3) ◽  
pp. 521-527 ◽  
Author(s):  
Roman Kisler ◽  
Ennes Sarradj
Keyword(s):  
Low Frequency ◽  
Sound Attenuation ◽  
Frequency Sound

scholarly journals Low-Frequency, Open, Sound-Insulation Barrier by Two Oppositely Oriented Helmholtz Resonators

Micromachines ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1544
Author(s):  
Yi-Jun Guan ◽  
Yong Ge ◽  
Hong-Xiang Sun ◽  
Shou-Qi Yuan ◽  
Xiao-Jun Liu
Keyword(s):  
High Performance ◽  
Low Frequency ◽  
Single Layer ◽  
Sound Insulation ◽  
Architectural Acoustics ◽  
Frequency Sound ◽  
Helmholtz Resonators ◽  
Viscous Loss ◽  
Insulation Effect ◽  
Broadband Sound

In this work, a low-frequency, open, sound-insulation barrier, composed of a single layer of periodic subwavelength units (with a thickness of λ/28), is demonstrated both numerically and experimentally. Each unit was constructed using two identical, oppositely oriented Helmholtz resonators, which were composed of a central square cavity surrounded by a coiled channel. In the design of the open barrier, the distance between two adjacent units was twice the width of the unit, showing high-performance ventilation, and low-frequency sound insulation. A minimum transmittance of 0.06 could be observed around 121.5 Hz, which arose from both sound reflections and absorptions, created by the coupling of symmetric and asymmetric eigenmodes of the unit, and the absorbed sound energy propagating into the central cavity was greatly reduced by the viscous loss in the channel. Additionally, by introducing a multilayer open barrier, a broadband sound insulation was obtained, and the fractional bandwidth could reach approximately 0.19 with four layers. Finally, the application of the multilayer open barrier in designing a ventilated room was further discussed, and the results presented an omnidirectional, broadband, sound-insulation effect. The proposed open, sound-insulation barrier with the advantages of ultrathin thickness; omnidirectional, low-frequency sound insulation; broad bandwidth; and high-performance ventilation has great potential in architectural acoustics and noise control.

Broadband fractal acoustic metamaterials for low-frequency sound attenuation

2016 ◽  
Vol 109 (13) ◽  
pp. 131901 ◽  
Author(s):  
Gang Yong Song ◽  
Qiang Cheng ◽  
Bei Huang ◽  
Hui Yuan Dong ◽  
Tie Jun Cui
Keyword(s):  
Low Frequency ◽  
Sound Attenuation ◽  
Acoustic Metamaterials ◽  
Frequency Sound

scholarly journals A Review of Low‐Frequency Sound Attenuation in the Oceans

1971 ◽  
Vol 50 (1A) ◽  
pp. 122-122
Author(s):  
W. H. Thorp ◽  
D. G. Browning ◽  
E. N. Jones ◽  
R. H. Mellen
Keyword(s):  
Low Frequency ◽  
Sound Attenuation ◽  
Frequency Sound

Temperature Dependence of Low‐Frequency Sound Attenuation in Fresh and Sea Water

1969 ◽  
Vol 45 (1) ◽  
pp. 306-306
Author(s):  
Everett N. Jones ◽  
David G. Browning ◽  
William H. Thorp ◽  
Robert H. Mellen
Keyword(s):  
Temperature Dependence ◽  
Sea Water ◽  
Low Frequency ◽  
Sound Attenuation ◽  
Frequency Sound

Localization of phonons and low-frequency sound attenuation in layered crystals

1999 ◽  
Vol 25 (11) ◽  
pp. 912-916 ◽  
Author(s):  
E. P. Chulkin ◽  
A. P. Zhernov ◽  
T. N. Kulagina
Keyword(s):  
Low Frequency ◽  
Sound Attenuation ◽  
Frequency Sound ◽  
Layered Crystals
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