Bugs in your hair

时间:2019-03-07 14:05:00166网络整理admin

Good news for actors, eavesdroppers and bat researchers. Emkay of Burgess Hill in West Sussex claims to have developed the world’s smallest broadcast-quality microphone. A pressure sensor and field-effect transistor amplifier are packed into a 2.5-millimetre cylinder. It is easily hidden in an actor’s hair, or could be used as a bug. The mike also records ultrasound, from bats,