scholarly journals Theoretical analysis and measurement of sound transmission loss in louver elements with a sound attenuating function using a Helmholtz resonator array

2014 ◽  
Vol 8 (3) ◽  
pp. JAMDSM0022-JAMDSM0022 ◽  
Author(s):  
Shuichi SAKAMOTO ◽  
Ryohei SUGAHARA ◽  
Toshihiro NAGUMO ◽  
Arata NAKANO ◽  
Hiromichi KAWASE
Keyword(s):  
Theoretical Analysis ◽  
Transmission Loss ◽  
Sound Transmission ◽  
Helmholtz Resonator ◽  
Sound Transmission Loss

Sound transmission loss of a Helmholtz Resonator-based acoustic metasurface

2022 ◽  
Vol 188 ◽  
pp. 108569
Author(s):  
Ahmad Yusuf Ismail ◽  
Jisan Kim ◽  
Se-Myong Chang ◽  
Bonyong Koo
Keyword(s):  
Transmission Loss ◽  
Sound Transmission ◽  
Helmholtz Resonator ◽  
Sound Transmission Loss

Sound Transmission Loss of Thick Perforated Panels

2001 ◽  
Vol 8 (1) ◽  
pp. 41-56 ◽  
Author(s):  
K. T. Chen ◽  
S. H. Jan
Keyword(s):  
Theoretical Analysis ◽  
Critical Frequency ◽  
Transmission Loss ◽  
Sound Transmission ◽  
Sound Intensity ◽  
Sound Transmission Loss ◽  
Coincidence Effect ◽  
Maximum Discrepancy

A study is reported of the sound transmission loss of perforated panels. The study includes a theoretical analysis and measurement by means of sound intensity. The predicted transmission loss is similar to that measured above 630 Hz. The maximum discrepancy is less than 2 dB. The perforation in a thick panel is found to reduce the coincidence effect at the critical frequency.

scholarly journals Design, Manufacturing, and Acoustical Analysis of a Helmholtz Resonator-Based Metamaterial Plate

Acoustics ◽  
2021 ◽  
Vol 3 (4) ◽  
pp. 630-641
Author(s):  
Sourabh Dogra ◽  
Arpan Gupta
Keyword(s):  
Transmission Loss ◽  
Sound Transmission ◽  
Helmholtz Resonator ◽  
Acoustic Properties ◽  
Sound Transmission Loss ◽  
Sound Waves ◽  
Acoustic Metamaterials ◽  
Additional Advantage ◽  
Helmholtz Resonators ◽  
High Sound

Acoustic metamaterials are materials artificially engineered to control sound waves, which is not possible with conventional materials. We have proposed a design of an acoustic metamaterial plate with inbuilt Helmholtz resonators. The plate is made of Polylactic acid (PLA) which is fabricated using an additive manufacturing technique. It consists of Helmholtz resonator-shaped cavities of different sizes. In this paper, we have analyzed the acoustic properties of the Helmholtz resonators-based metamaterial plate experimentally as well as numerically. The experimental results are in good agreement with the numerical results. These types of 3D-printed metamaterial plates can find their application where high sound transmission loss is required to create a quieter ambience. There is an additional advantage of being lightweight because of the Helmholtz resonator-shaped cavities built inside the plate. Thus, these types of metamaterial plates can find their application in the design sector requiring lighter materials with high sound transmission loss.

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