scholarly journals Design of Passive Transport Noise Barrier Having Areas of High Noise Level for Acoustic Energy Harvesting

2020 ◽  
Vol LVII (1) ◽  
Author(s):  
I. Kralov
Keyword(s):  
Energy Harvesting ◽  
Noise Level ◽  
Acoustic Energy ◽  
Passive Transport ◽  
High Noise ◽  
High Noise Level ◽  
Noise Barrier ◽  
Acoustic Energy Harvesting

scholarly journals Acoustic energy harvesting using piezoelectric generator for railway environmental noise

2018 ◽  
Vol 10 (7) ◽  
pp. 168781401878505 ◽  
Author(s):  
Hee-Min Noh
Keyword(s):  
Energy Harvesting ◽  
High Speed ◽  
Power Level ◽  
Helmholtz Resonator ◽  
Acoustic Energy ◽  
Frequency Noise ◽  
High Speed Train ◽  
High Noise ◽  
Energy Harvesting System ◽  
Acoustic Energy Harvesting

High-speed trains have a sustained high-noise level for long periods during operation. Although such high-noise levels are effective for acoustic energy harvesting, a practical design for an acoustic energy harvesting system from a high-speed train is lacking. In this study, the design of an energy harvesting system was implemented utilizing noise from a high-speed train during practical operation. We investigated the noise generated from a high-speed train and derived the characteristics of the main noise sources. The results confirmed that low-frequency noise of 50–200 Hz was generated in the passenger, cab, and between car sections. Results from this investigation were used to design a Helmholtz resonator for a target noise of 174 Hz based on a theoretical model. Moreover, numerical simulation was conducted using sound source speakers to investigate vibrations in the walls of the resonator. Finally, energy harvesting experiments were conducted using various types of piezoelectric elements such as rectangular and circular plates. Experimental results indicate that approximately 0.7 V was generated for an incident sound pressure level of 100 dB using a large rectangular plate. Such power level is sufficient to power a variety of low-power electric devices.

scholarly journals The effect of type of sound damper material in the Helmholtz resonator to the output power spectrum of acoustic energy Harvester

2019 ◽  
Vol 3 (2) ◽  
pp. 50
Author(s):  
Hedwigis Harindra ◽  
Agung Bambang Setio Utomo ◽  
Ikhsan Setiawan
Keyword(s):  
Energy Harvesting ◽  
Power Spectrum ◽  
Electric Power ◽  
Energy Harvester ◽  
Helmholtz Resonator ◽  
Acoustic Energy ◽  
Acoustic Energy Harvesting ◽  
Wasted Energy ◽  
Second Peak ◽  
Output Electric Power

<span>Acoustic energy harvesting is one o</span><span lang="EN-US">f</span><span> many ways to harness </span><span lang="EN-US">acoustic </span><span>noises as wasted energy into use</span><span lang="EN-US">f</span><span>ul </span><span lang="EN-US">electical </span><span>energy using an acoustic </span><span>energy harvester. </span><span>Acoustic </span><span>energy harvester t</span><span lang="EN-US">h</span><span>at tested by Dimastya (2018) </span><span lang="EN-US">which is consisted of loudspeake</span><span>r </span><span lang="EN-US">and Helmholtz resonator, </span><span>produced two-peak spectrum. It is </span><span lang="EN-US">suspected</span><span> that the </span><span lang="EN-US">f</span><span>irst peak </span><span lang="EN-US">is due t</span><span>o </span><span lang="EN-US">Helmholtz</span><span> resonator resonance and the second peak </span><span lang="EN-US">comes</span><span lang="EN-US">from the resonance of the conversion </span><span>loudspeaker. </span><span lang="EN-US">This research is to experimentally confirm the guess of the origin of the first peak. The experiments are performed by adding silencer materials on the resonator inner wall which are expected to be able to reduce the height of first peak and to know </span><span>how </span><span lang="EN-US">they</span><span> a</span><span lang="EN-US">ff</span><span>ect t</span><span>he output electric power spectrum o</span><span lang="EN-US">f</span><span> t</span><span>he acoustic energy harvester. </span><span lang="EN-US">Three different silencer materials are used, those are</span><span> glasswool, acoustic </span><span lang="EN-US">f</span><span>oam, and styro</span><span lang="EN-US">f</span><span>oam</span><span lang="EN-US">,</span><span> with</span><span lang="EN-US"> the same thickness of</span><span> 12 cm. </span><span lang="EN-US">The r</span><span>esult</span><span lang="EN-US">s</span><span> show that glasswool absorb</span><span lang="EN-US">s</span><span> sound more e</span><span lang="EN-US">ff</span><span>ectively than acostic </span><span lang="EN-US">f</span><span>oam and styro</span><span lang="EN-US">f</span><span>oam. The use o</span><span lang="EN-US">f</span><span> glasswool, acoustic </span><span lang="EN-US">f</span><span>oam, and styro</span><span lang="EN-US">f</span><span>oam with 12 cm thickness lowered the </span><span lang="EN-US">f</span><span>irst peak </span><span lang="EN-US">by</span><span> 90% (</span><span lang="EN-US">f</span><span>rom 39 mW to 0,5 mW), 82% (</span><span lang="EN-US">f</span><span>rom 39 mW to 0,7 mW), and 82% (</span><span lang="EN-US">f</span><span>rom 39 mW to 0,7 mW), respectively. </span><span lang="EN-US">Based on these results, it is concluded that the guess of the origin of the first peak is confirmed.</span>

Efficient acoustic energy harvesting by deploying magnetic restoring force

2019 ◽  
Vol 28 (10) ◽  
pp. 105037 ◽  
Author(s):  
Masoud Rezaei ◽  
R Talebitooti ◽  
M I Friswell
Keyword(s):  
Energy Harvesting ◽  
Acoustic Energy ◽  
Restoring Force ◽  
Acoustic Energy Harvesting

Acoustic energy harvesting using an electromechancal Helmholtz resonator.

2009 ◽  
Vol 125 (4) ◽  
pp. 2596-2596 ◽  
Author(s):  
Fei Liu ◽  
Alex Phipps ◽  
Stephen Horowitz ◽  
Louis Cattafesta ◽  
Toshikazu Nishida ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Helmholtz Resonator ◽  
Acoustic Energy ◽  
Acoustic Energy Harvesting

Enhanced Acoustic Energy Harvesting Using Coupled Resonance Structure of Sonic Crystal and Helmholtz Resonator

2013 ◽  
Vol 6 (12) ◽  
pp. 127101 ◽  
Author(s):  
Aichao Yang ◽  
Ping Li ◽  
Yumei Wen ◽  
Caijiang Lu ◽  
Xiao Peng ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Helmholtz Resonator ◽  
Acoustic Energy ◽  
Resonance Structure ◽  
Sonic Crystal ◽  
Acoustic Energy Harvesting
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