飞机壁板辐射声的有源控制

 利用一块飞机壁板讨论有源消声技术降低飞机舱内噪声。首先从理论上说明了利用有源消声抵消壁板辐射声的可行性；介绍了可用于工程的自适应有源消声器；最后在实验室对振动激励的壁板输射声、声激励时壁板的透射声进行了消声实验,取得了良好的效果。

ACTIVE CONTROL OF SOUND RADIATED FROM AN AIRPLANE PANEL

The reduction of interior noise of propeller aircraft has been a main problem which is cared by acousticians.The methods for noise control which are generally adopted are absorp-tion,damping,insulation,etc. But the effects of reduction for low frequency noise are not sat-isfying because the properties of the material become worse at low frequency.Recently the technique of active sound control is considered to be an effective manner to controI the low fre-quency noise,especially the interior noise of propeller aircraft. Thismper first,theoretically,discusses the possibility for active control of sound radiation from an airplane panel,them intro-duces an adaptive active control system and last experimental results on active control of sound radiatio and sound transmission through panel are presented.The results are encouraging.