Loudspeaker aiming and room coverage
Sound Pressure Level decreases by 6dB for every doubling of distance from the
source loudspeaker. This means that 96dB at 5m from a loudspeaker will reduce
to 90dB at 10m – a significant drop in energy.
Because of this level drop over distance, in larger rooms it’s worth considering
additional loudspeakers to counter this effect, maintaining volume and
intelligibility. In this case, it is important that the second row of loudspeakers
down the room are delayed to match the arrival of the sound from the first pair of
speakers, as shown below.
25 de
g
IDEAL AIMING FOR A 50 DEGREE VERTICAL HORN
HORN AXIS AIMED
AT FURTHEST POINT OF COVERAGE
-6dB AIMED AT NEAREST
POINT OF COVERAGE
-6dB REDUCED ENERGY
ON CEILING
Loudspeaker axis aimed at the furthest point of
the desired coverage area
11.40 m
IN THIS EXAMPLE THE ROOM IS TOO BIG FOR ONE
SPEAKER TO BE ABLE TO COVER RIGHT TO THE BACK.
A SECOND SPEAKER IS ADDED AT THE POINT WHERE
THE FIRST AND SECOND CROSS OVER.
THE SECOND IS DELAYED BACK TO THE FIRST USING
THE FORMULA:
distance/speed of sound (334m/s @ 20 degrees C)
IN THIS CASE:
11.4/334 = 0.033 seconds, 33 milliseconds
14/23
Cuboid
Loudspeakers
Loudspeakers
USER GUIDE
© 2022. Optimal Audio Group Ltd. (v2.2)
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Introduction
Aiming/
coverage
Overview
Horizontal
coverage
Wall mount
Connecting up
Ceiling mount
Matching
speakers/amps
Grille removal
Accessories
Badge rotation
Specifications
Coverage
Horn rotation
Safety info
