防音堤の減音効果に関する数値解析

• 坂本 慎一

  東京大学生産技術研究所

• 橘 秀樹

  千葉工業大学

書誌事項

タイトル別名

• Numerical Analysis on Noise Attenuation Effects of Embankments
• ボウオンテイ ノ ゲンオン コウカ ニ カンスル スウチ カイセキ

抄録

Noise attenuation performance of embankment was investigated by numerical analysis using the finite difference time domain (FDTD) method. The visualization of transient sound propagation over embankments has revealed that the sound wave travels along their shoulder slopes. From the quantitative examination on the insertion loss, it has been found that the noise attenuation effects in low frequencies become lower as the shoulder slope of the embankment becomes gentler. Even if the embankment has finite acoustic impedance (in many cases, embankments are covered with lawn or grass), it is considered that the deterioration of noise attenuation effect in low frequencies remains because the acoustic impedance is generally large. When assessing their noise reduction effects, such deterioration of the performance must be carefully considered.

収録刊行物

• 騒音制御

  騒音制御 28 (4), 285-290, 2004

  公益社団法人 日本騒音制御工学会

キーワード

• 防音堤
• 挿入損失
• FDTD法

詳細情報

• CRID: 1390001204766681344
• NII論文ID: 10013461650
• NII論文ID: 10019736069
• NII書誌ID: AN00361298
• DOI: 10.11372/souonseigyo1977.28.285
• ISSN: 18837506
• ISSN: 03868761
• NDL書誌ID: 7054726
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7054726
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可