Active control of noise propagation outdoors.

主动控制室外噪声传播。

• 批准号: 06650599
• 负责人: HASEBE Masaki
• 金额: $ 1.54万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650599/
• 关键词: Active noise control; Road traffic noise; 3-dimensional space; JMC theory; Tripole; 能動騒音制御; 3次元空間; 騒音; 伝搬

Most of the current research on active noise control is confined to restricted spaces such as earphones, active silencers, air-conditioning ducts, truck cabins and aircraft fuselages. In this study, thc basic concepts of road traffic noise reduction by using active noise control in unconfined spaces are explored. The approach is to develop a controlled acoustic shadow, gcnerated by a wall of secondary sources, to reduce unwanted sound in the direction of a complalnt area. The basic JMC theory is considered, followed by computer modelling, and experimental measurements. In the experiments, tripole secondary sound sorces were used to control the wall of secondary sources. Wide noisy area were controlled to a quiet space by our active noise control system. The application to the road traffic noise problem was discussed.

目前主动噪声控制的研究大多局限于耳机、主动消音器、空调管道、卡车驾驶室和飞机机身等受限空间。在本研究中，探讨了在非封闭空间中使用主动噪声控制来降低道路交通噪声的基本概念。该方法是开发一个受控的声学阴影，由二次声源墙产生，以减少抱怨区域方向上不需要的声音。考虑了基本的 JMC 理论，然后是计算机建模和实验测量。在实验中，使用三极二次声源来控制二次源墙。我们的主动噪声控制系统将宽阔的嘈杂区域控制为安静的空间。讨论了该方法在道路交通噪声问题中的应用。