Description
Requires matched power amplifier.
Campbell Associates calibration laboratory have developed a verification procedure to comply with these requirements; it mounts the dodecahedron speaker on a rotating spigot in an anechoic chamber which is then rotated through 360° passed a measurement microphone. Measurements are made for each 1°rotation and the gliding arc calculated and compared with the specifications. The example shows the effect of faulty speakers, i.e. no output, damaged speaker, such as scraping coils or damaged cone, and finally the return to normal operation after repair.
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