在会议室开会时，常常会遇到一种情况，就是喇叭里突然发出刺耳的尖叫。这种现象的原理在物理学上叫“自激”，是把喇叭的声音传到麦克风里，再经过扩音器中三极管数百倍的放大，在喇叭中传出更大的声音，然后这些声音又被送进了麦克风，又经过数百倍的放大，又在喇叭中播出来……这样一直重复下去，形成正反馈，最后就形成了尖叫声音。
n. self-excitation ; autoexcitation ; free running
misc. auto-exciting
... autoenlarging apparatus 自动放大器，自动放大机 autoexcitation 自激，自激振荡；自励 auto-exciting 自激，自励 ...
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... self organizing system 自组织系统 self oscillation 自激 self phasing 自动相位稳定 ...
基于154个网页-相关网页
自激振荡 free oscillations ; self excited oscillations ; autonomous vibration
自激振动 self excited vibration ; [力] self-induced vibration ; self sustained vibrations ; self-exciting vibration
自激振荡器 free running oscillator ; [电子] self-excited oscillator ; self-oscillator ; free-running generator
自激励 self-excitation ; [电子] autoexcitation ; self-exciting
自激活 [科技] self-activation ; self-activating ; autonomous activation ; self-activated
自激发电机 self excited generator ; dynamo electric machine ; self-excited dynamo ; excited generator
自激电动机 motor with self excitation ; self-excited motor ; self-excitation motor
自激逆变器驱动 AUTONOMOUS INVERTER-DRIVEN
自激系统 autonomous system
The iced conductors generate self-excitation vibration in the wind.
覆冰导线在风力作用下产生自激振动,当产生气动力负阻尼时易产生低频大振幅的振动,即驰振。
参考来源 - 覆冰导线气动力特性的数值模拟研究·2,447,543篇论文数据，部分数据来源于NoteExpress
加工细长轴时，工件易产生自激振动。
Then avoid the surge vibration of the major axis manufacture.
扩张式自激超越弹簧离合器是一种新型离合器。
The expanding self_energizing overrunning spring clutch is a new type of overrunning clutch.
讨论了自激式激光器在表面粗糙度测量中的应用。
The application of self-stimulated laser in surface roughness measurement is discussed.
应用推荐