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.
A more recent development is the electret condenser microphone (Fig.2). In these models, the polarizing voltage is impressed on either the diaphragm or the back plate during the manufacturing process, and this charge remains for the life of the microphone.