The portion of the microphone that actually converts the movement of the diaphragm into electrical current or voltage changes.
Impedance Matching
Having or converting the output impedance of a device so that it matches the impedance of the input it will feed.
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An older term meaning the same thing as Capacitor (an electronic device which is composed of two plates separated by an insulator and can store charge) but sill in common use when referring to a microphone's active element.
Centre Frequency
The frequency of the audio signal that is boosted or attenuated most by an equalizer with a peak equalization curve.
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To increase gain, especially to increase gain at specific frequencies with an equalizer.
Beats Per Minute BPM
The number of steady even pulses in music occurring in one minute and there fore defining the tempo of the song.
Equal Loudness Contours
A drawing of several curves showing how loud the tones of different frequencies would have to be played for a person to say they were of equal loudness.
Decibel (dB)
1) Relative measurement for the volume (loudness) of sound. Also used to measure the difference between two voltages, or two currents. See Zero dB.
2) A numerical expression of the relative loudness of a sound. The difference in decibels between two
sounds is ten times the common logarithm of the ratio of their power levels.
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