Glossary
Attenuator
An electronic device inserted between the microphone and input preamplifier which eliminates overload by lowering the microphone output signal.
Decibel
Abbreviated dB, it is a relative measure of sound intensity or volume. It expresses the ratio of one sound to another. The dB is about the smallest change in sound volume that the human ear can detect.
Distortion
Any change or difference between the original sound and that reproduced by a recording device. Distortion takes on many forms and although it can never be completely eliminated, can be reduced to a minimum in a good recording or reproducing system.
Impedance
The resistance to the flow of alternating current in an electrical sircuit, generally categorized as either high or low, but sometimes given in ohms or millions of ohms (megohms). Commonly used to characterize the input or output termination of components so that proper match can be made when interconnecting two or more devices.
Loudness
Sound level as detected by the human ear. The ear is more sensitive to middle frequencies than to low or high extremes, especially at low levels. Learn more by understanding the Fletcher-Munson curve.
Pad
A nonadjustable passive network which reduces the power level of a signal without introducing appreciable distortion.
Roll Off
A gradually increasing LOSS or attenuation with increase or decrease of frequency beyond the substantially flat portion of the response characteristic.
VU
The unit of volume in which the standard volume indicator is calibrated.
Working Distance
The distance from the performer or instrument to the microphone.
