Principle Analysis and Experimental Measurement of Sound Wave Frequency Attenuation

2021 ◽  
Vol 3 (1) ◽  
pp. 55-68
Author(s):  
Chen Yu ◽  
Chen Shouyuan
Keyword(s):  
Sound Wave ◽  
Experimental Measurement ◽  
Wave Frequency

scholarly journals Examining Use of Sonic Bloom Technology on the Stomata Opening of Drought-Stressed Soybean

2018 ◽  
Vol 15 (4) ◽  
pp. 861-869 ◽  
Author(s):  
Istirochah Pujiwati ◽  
Bambang Guritno ◽  
Nurul Aini ◽  
Setyawan P. Sakti
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Protein Content ◽  
Nutrient Uptake ◽  
Sound Wave ◽  
Soil Moisture Content ◽  
Phosphorus Uptake ◽  
Soybean Seed ◽  
Stomatal Opening ◽  
Wave Frequency

Sonic bloom is a technology that combines high frequency sound waves and organic nutrients, intended for better plant growth to increase its productivity. This study aimed to determine the effect of sound wave frequency and drought stress on stomatal opening, nutrient uptake efficiency through leaf, and soybean yield. We designed the research as a split plot experiment. The main plot was sound wave frequency consisting of four levels (no frequency imposed, frequencies 2, 4 and 6 kHz. The sub-plot was three soil moisture contents (50,75, and 100% field capacity). We found that the interaction of frequency and soil moisture content affected the width of stomata at the age of 30,40 and 50 days after planting (dap), the efficiency of nitrogen uptake, phosphorus uptake and potassium uptake and the protein content of seeds. The width of stomatal opening at a frequency of 4 kHz in soil moisture 100% FC showed the highest value and was not significantly different from soil moisture 75% FC. There was a positive correlation between exposure to plants with a frequency of 4 kHz with stomatal opening, nutrient uptake and increased yield of soybean crops. The use of sonic bloom technology with plant exposure at a frequency of 4 kHz could increase drought tolerance to 75% soil moisture content. Soybean seed yield increased by 40.89% and seed protein content increased by 10.3%.

2503 Influence of Sound Wave Frequency on Plane Jet Characteristics

2006 ◽  
Vol 2006.2 (0) ◽  
pp. 213-214
Author(s):  
Ken HIRASHITA ◽  
Tetsuya INAGAKI ◽  
Shouichiro IIO ◽  
Toshihiko IKEDA
Keyword(s):  
Sound Wave ◽  
Wave Frequency ◽  
Plane Jet ◽  
Jet Characteristics

scholarly journals Detection and Evaluation of Effective of Digital Communication of Drug on Human Body

2020 ◽  
Vol 4 (1) ◽  
pp. 82-84
Author(s):  
Zakaria K. Jalal ◽  
Abdulrazak A. Mohammed ◽  
Adil H. Mohammed
Keyword(s):  
Human Brain ◽  
Sound Wave ◽  
Human Body ◽  
Digital Communication ◽  
Sound Frequency ◽  
Wave Frequency ◽  
Human Being ◽  
The Brain

Nowadays, there is a wide using of mobile and internet from various ages, due to some bad systems which they work to send signals(sound wave frequency) within the music or will be spread to affect the brain of the humankind. Therefore, this paper expresses thedetection and evaluation of (the signal of sound frequency) which influence the human brain, it has been measured some frequency byprogramming in the mobile and found a trend to detect such frequencies and a way to produce a human being from it.

scholarly journals C06 Relationship between Regenerator Temperature and Sound Wave Frequency of a Coaxial Thermoacoustic Refrigerator

2011 ◽  
Vol 2011.14 (0) ◽  
pp. 109-110
Author(s):  
Eiji NODA ◽  
Takao KOSHIMIZU ◽  
Adhika WIDYAPARAGA ◽  
Masamichi KOHNO ◽  
Yasuyuki TAKATA
Keyword(s):  
Sound Wave ◽  
Wave Frequency ◽  
Thermoacoustic Refrigerator

Simulation of Sound Wave Propagation With Damping for Realistic Sound rendering for Games and Interactive Applications

2012 ◽  
Author(s):  
Bruno Moreira ◽  
Mauricio Kischinhevsky ◽  
Marcelo Zamith ◽  
Esteban Clua ◽  
Diego Brandao
Keyword(s):  
Wave Propagation ◽  
Sound Wave ◽  
Interactive Applications ◽  
Sound Rendering

Technical Note. Influence of Material Used for the Regenerator on the Properties of a Thermoacoustic Heat Pump

2013 ◽  
Vol 38 (4) ◽  
pp. 565-570 ◽  
Author(s):  
Bartłomiej Kruk
Keyword(s):  
Heat Transfer ◽  
Temperature Gradient ◽  
Acoustic Wave ◽  
Heat Pump ◽  
Sound Wave ◽  
Heat Exchangers ◽  
Heat Pumps ◽  
Technical Note ◽  
New Materials ◽  
Modern Technologies

Abstract Research in termoacoustics began with the observation of the heat transfer between gas and solids. Using this interaction the intense sound wave could be applied to create engines and heat pumps. The most important part of thermoacoustic devices is a regenerator, where press of conversion of sound energy into thermal or vice versa takes place. In a heat pump the acoustic wave produces the temperature difference at the two ends of the regenerator. The aim of the paper is to find the influence of the material used for the construction of a regenerator on the properties of a thermoacoustic heat pump. Modern technologies allow us to create new materials with physical properties necessary to increase the temperature gradient on the heat exchangers. The aim of this paper is to create a regenerator which strongly improves the efficiency of the heat pump.

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