And both American and Israeli armies and some less scrupulous police forces around the world are said to have used a sonic tool, the "long range acoustic device".
美国和以色列以及世界上做事欠谨慎的警察据说都使用过一种叫做“远程声学装置”的音波武器。
2
Background noises should not disturb the users, just like people outside of the Sonic Chair should hardly listen to the audio coming from the device.
外面的杂音不会妨碍使用者(听音乐)，而外面的人也几乎听不到座椅内的声音。
3
This paper briefly introduces sonic latest technology and equipments dealing with invalidation of electronic primary device.