Biocomposite Structures as Sound Absorber Materials

2015 ◽  
pp. 161-198
Author(s):  
Nazire Yılmaz ◽  
Nancy Powell
Keyword(s):  
Sound Absorber

scholarly journals Subwavelength broadband sound absorber based on a composite metasurface

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Houyou Long ◽  
Chen Liu ◽  
Chen Shao ◽  
Ying Cheng ◽  
Kai Chen ◽  
...  
Keyword(s):  
Sound Absorber ◽  
Broadband Sound

Teaching-learning-based optimization of an ultra-broadband parallel sound absorber

2021 ◽  
Vol 178 ◽  
pp. 107969
Author(s):  
Nansha Gao ◽  
Baozhu Wang ◽  
Kuan Lu ◽  
Hong Hou
Keyword(s):  
Sound Absorber ◽  
Teaching Learning Based Optimization ◽  
Teaching Learning

Heterogeneously perforated honeycomb-corrugation hybrid sandwich panel as sound absorber

2017 ◽  
Vol 134 ◽  
pp. 502-512 ◽  
Author(s):  
Yufan Tang ◽  
Feihao Li ◽  
Fengxian Xin ◽  
Tian Jian Lu
Keyword(s):  
Sandwich Panel ◽  
Sound Absorber

Preliminary Study on Bamboo as Sound Absorber

2014 ◽  
Vol 554 ◽  
pp. 76-80 ◽  
Author(s):  
Fazlin A. Khair ◽  
Azma Putra ◽  
Mohd Jailani Mohd Nor ◽  
Nurul Atiqah ◽  
M.Z. Selamat
Keyword(s):  
Absorption Coefficient ◽  
Sound Absorption ◽  
Hollow Structure ◽  
Chemical Substance ◽  
The Body ◽  
Natural Material ◽  
Sound Absorber ◽  
Tube Test ◽  
Average Absorption Coefficient ◽  
Preliminary Study

Synthetic acoustic materials are known for their poisonous chemical substance to the environment and also the particles which are harmful to human health. Research is now directed towards finding an alternative acoustic absorber made from natural materials. This paper presents the utilization of bamboo, a natural material having hollow structure to act as sound absorber. In an impedance tube test, the hollow path is arranged to face the sound incidence. The result reveals that bamboo having length of 2 cm has average absorption coefficient of 0.95 at frequency above 3 kHz. Performance at lower frequencies can be controlled by adding the air gap behind the system. Introduction of microholes along the body shows no significant effect to increase the sound absorption.

Experimental study of smart sound absorber using multimode electromechanical coupling control in the low-frequency range

2021 ◽  
Vol 263 (3) ◽  
pp. 3800-3810
Author(s):  
Xiang Liu ◽  
Keming Wu ◽  
Lixi Huang
Keyword(s):  
Electromechanical Coupling ◽  
Electrical Response ◽  
Low Frequency ◽  
Design Procedure ◽  
Frequency Range ◽  
Acoustic Performance ◽  
Sound Absorber ◽  
Multiple Frequencies ◽  
Broadband Sound ◽  
Shunt Circuit

To construct a smart sound absorber in the low-frequency range with a wide control band, a piezoelectric ceramic (PZT) shunted with multiple resonance circuit is attached onto a micro-perforated panel (MPP) to perform as a smart sound absorber. The absorption can be controlled by the shunt circuit parameters conveniently. This smart micro-perforated panel (MPP) is investigated experimentally to explore the feasibility and design procedure in practical use. Based on the coupling among the acoustical, electrical, and mechanical fields, the proposed broadband sound absorber can achieve good acoustic performance on subwavelength scales. The electrical response of the shunt circuit is tested with a Network Analyzer. The acoustic performance of the smart sound absorber is measured in an impedance tube with the two-microphone transfer function method. The experimental results validate that the shunt circuit can resonate with the PZT patch at multiple frequencies, and hence improve the sound absorption of the smart absorber at these frequencies.

Application to Sound Absorber of Nano Fibrous Sheets

2018 ◽  
Vol 74 (3) ◽  
pp. P-106-P-109
Author(s):  
SHUICHI AKASAKA
Keyword(s):  
Sound Absorber

Chromium containing leather trimmings valorization: Sustainable sound absorber from collagen hydrolysate intercalated electrospun nanofibers

2020 ◽  
pp. 124231
Author(s):  
Sowmya Selvaraj ◽  
Sathya Ramalingam ◽  
Siddharth Parida ◽  
Jonnalagadda Raghava Rao ◽  
Nishad Fathima Nishter
Keyword(s):  
Electrospun Nanofibers ◽  
Collagen Hydrolysate ◽  
Sound Absorber
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