Globe Theatrical Supply Resource Center 712/255-0972
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| GTSAID: MICROPHONE TERMINOLOGY |
| 1. Connector Gender /M = Male pin(s). /F = Female socket(s). 2. Connector Type A Phone Plug is ¼" diameter x 1¼" long with various tip configurations for monaural, stereo, or firm-locking (flat). {Based on telephone manual switchboard interconnect plugs.} A Phono Plug (also called RCA) is 1/8" diameter x 1" long with surrounding ground collar. {A small, lightweight connector originally designed for personal audio components.} An XLR Plug contains 3 recessed triangular-mounted pins. {A protected encased connector originally designed to permit use with either balanced or unbalanced mic connections.} 3. Impedance ("Z" = Resistance: the microphone output must "match" the mixer or amplifier input connection to permit transmission of a strong, clear signal.) Low-Z = usually 600 ohms. High-Z = usually 50,000 (50K) ohms. 4. Directionality (The size and shape of the "cone" of sound to which the face or head of the mic is most responsive.) Omnidirectional = broad area coverage. For shorter distance and/or wider spread sound "pickup"; for example, single mic interviews or vocal trio. Unidirectional (Cardioid) = 1 primary pickup direction; e.g., to separate a solo voice from a backup chorus or instruments. Hypercardioid = a narrower pickup cardioid. Polar Cardioid (Shotgun) = a narrow cone for more diistant, limited arc pickup; e.g., overhead mic'ing of a choral section (right, center, left). 5. Also, Phantom Powered = a mic requiring a voltage source (usually 48 volts from a mixer, separate power supply, or batteries) for increased signal output. Wireless = a battery powered cable-less transmitting microphone allowing complete movement freedom. Requires a frequency mated receiver. |