The minimum value of input signal that is required by an electronic unit, such as a tuner, to deliver a specified output signal level. The measure of a microphone’s sensitivity is an indication of efficiency. A classical dynamic mike may have a sensitivity of 0.2 mV. A model giving 0.25 mV is considered sensitive and 0.1 mV is unsuitable for recording low frequencies. Condenser mikes always have a preamplifier in the mike casing otherwise their high impedance would not allow the signal to be transmitted along a cable. It is difficult to produce a very low noise preamp capable of receiving without overloading a signal given by a condenser mike placed in a strong acoustical field. For this reasonit is better to have special preamps for condenser mikes.
"The CD's of the older music took me back to a fun and carefree time of life. I enjoyed sharing the songs and stories with my children. Music can be a sort of history lesson. Because many events are marked by a song that stays in your mind. When the music is played a variety of memories return that otherwise might not have been triggered. ..."