ROOM IN THE SMALL SERVICE SECTOR
When designing the Sound System the correct positioning of the listening
points must be identified.
A precise layout of the loudspeakers in fact guarantees better sound quality
and balance in the whole room.
Rules to be applied to identify the number of loudspeakers to install are
given below.
The distances to adopt to position loudspeakers and the areas which BTicino
loudspeakers cover are given below, as a function of the sound quality for
a room in the home. For rooms in the small service sector, the sound level
required is on average lower than in the home. In this case it is assumed
that a loudspeaker covers double the area.
ROOM IN THE HOME AND SMALL SERVICE SECTOR
The loudspeakers should be at a height of 1m near to listening points where
people are seated. Instead use a height of 2.5m near to listening points
where people are standing (e.g. waiting room.).
Positioning the loudspeakers
Description Distance (m)
Distance between loudspeakers (A) 2-4
Distance from the floor (B) 1-2.5
Distance between loudspeaker and listener (C) 2-4
Loudspeaker coverage
Type of loudspeaker Area covered by the loudspeakers
In the home In the small service sector
GOOD SUFFICIENT GOOD SUFFICIENT
L4565 (flush-mounted 3m
2
7m
2
- -
box item 506E)
L4567 (wall-mounted) 5m
2
12m
2
10m
2
24m
2
L4566 (ceiling-mounted) 6m
2
15m
2
12m
2
30m
2
If a Sound System is to be installed in a room of the small service sector, the
type of room where the system is to be installed must be identified. When
positioning playing points remember:
• The height from the playing point (H)
• The area to be covered (S)
• The distance between the playing points (d)
• The distance between the listener and the playing point (D)
Location of the loudspeakers Item L4566
H (m) 2.5 3 3.5 4 4.5
d (m) 3 4 5 6 7
The formula to apply to obtain the number of loudspeakers to be installed in
a room on the basis of its total area is given below.
N = L
1
x L
2
- [ (L
1
x d) + (L
2
-d) x d]
d
2
Legend:
N: playing points
L1 e L2: length of the sides of the room to be covered
d: distance between the loudspeakers referring to the room height
(see table above)
A
B
C
d
H
Example:
Legend: L1: 20m
2
- L2: 40m
2
-
H: 4.5m from the table one obtains d: 7
The table gives the recommended distances between the ceiling-mounted
loudspeakers referring to the room height.
Identifying the room and calculating the playing points
Level of room sound coverage
Type of room Sound coverage Type of Sound coverage
value surroundings value
(dBA) (dBA)
Mechanical industry 80 Shopping centre 60
Mechanical workshop 75 Café 60
Gymnasium 70 Shop 60
Conference room 70 Restaurant 55
Electronics industry 70 Meeting room 55
Supermarket 65 Hotel corridors 55
Fast-food outlets 65 Offices 55
Warehouses 65 Museums 50
Places of prayer 65 Hotel rooms 40
L1
L2
N = 20 x 40 - [ (20 x 7) + (40-7) x 7]
= 8.8 consider N=10
7
2
GENERAL RULES FOR INSTALLATION
Positioning the loudspeakers
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