AVIXA CTS-D: Loudspeakers All Possible Questions and Answers with complete solution
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Course
AVIXA CTS-D: Loudspeakers
Institution
AVIXA CTS-D: Loudspeakers
Full overlap distributed ceiling system arrangement - Will provide excellent coverage at most
frequencies (1.4 dB variation). However, this is a costly approach, and will likely provide more coverage
than required. This amount of overlap may also result in some negative interaction with the sound...
Full overlap distributed ceiling system arrangement - Will provide excellent coverage at most
frequencies (1.4 dB variation). However, this is a costly approach, and will likely provide more coverage
than required. This amount of overlap may also result in some negative interaction with the sound from
nearby loudspeakers, such as phase cancellation. This is because a dense overlap pattern may project
too much acoustical energy within the space.
Distributed Loudspeaker System - Employs multiple loudspeakers that are separated by some
distance from each other. This is most commonly done by placing them in the ceiling above the audience
area.
loudspeaker polar pattern directivity - how much area a selected loudspeakers will cover, typically
in ballon plot format representing a specific frequency response
Coverage is typically stated at the 6 dB down points with 5 degree markings
What two items do a loudspeaker polar chart indicate? - 1. The radiated energy of a loudspeaker
at a given frequency in either the vertical or horizontal plane. Energy radiates outward - but not equally -
in all directions from the loudspeaker, and polar plots are used to show the pattern of the energy.
2. The degree off-axis where the radiated energy decreases by 6 dB as compared to the on axis level.
These locations are referred to as the, "6 dB down points." Most often, the coverage pattern in
equipment specifications is typically stated at the 6 dB down points.
Loudspeaker Coverage Formula - This is the formula for the diameter of the circle representing
the coverage area of a loudspeaker:
D = 2 * (H - h) * tan (C∠ / 2)
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