Carpal Tunnel Syndrome Symptoms & Signs. Carpal tunnel syndrome arises from compression of the median nerve that supplies the hand. Symptoms begin with numbness and/or tingling of the hand in the distribution of this nerve (the thumb, index, middle, and thumb side of the ring fingers).
An Condenser microphone is a type of microphone that consists of a pair of charged plates that can be forced closer or further apart by variations in pressure. In effect, the plates act like a sound-sensitive capacitor.
microphones started to be manufactured for recording and broadcast applications. The thermionic valve (invented in 1907 by Lee de Forest) was a key factor in this, as capacitor microphones require impedance conversion impossible to achieve in any other practical way. Condenser microphones were employed, to a limited extent, in the BBC from 1926 but