The Effect of Wood Condition on Sound Wave Propagation
作者: Ahmed El-HadadGraham Ian BrodieBerhan Shiday Ahmed
作者单位: 1Department of Forest and Ecosystem, Faculty of Science, The University of Melbourne, Melbourne, Australia
2Department of Agriculture and Food Science, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Melbourne, Australia
刊名: Open Journal of Acoustics, 2018, Vol.8 (3), pp.37-51
来源数据库: Scientific Research Publishing Journal
DOI: 10.4236/oja.2018.83004
原始语种摘要: This experiment aims to study the effects and modifications that occurred on acoustic signal harmonics when travelling through wood. The experiment measured the output amplitudes and frequencies of the travelling signals and compared them with the original input signal. The factors under investigation in this experiment included: wood type, wood moisture content (MC), input signal frequencies, signal travelling distance and wood condition (wood with/without cracks). The experiment findings demonstrated that higher input signal frequencies results in higher attenuation of acoustic emissions (AE) travelling through the wood. The results also indicate that: wood type, MC, the signal’s travelling distance, and the orientation of the travelling signal, compared to the wood’s grain direction,...
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  • travelling 移动
  • distance 距离
  • experiment 实验
  • signal 信号
  • orientation 定向
  • acoustic 声的
  • investigation 研究
  • attenuation 衰减
  • higher 
  • affected 受了影响的