Klaxon Home Security System GP10 User Manual

GP6, GP10 and GP12 Sirens  
INSTALLATION AND MAINTENANCE  
1.  
Installation  
a. Fix siren to a firm level base at a minimum height of 3m above the ground and free  
of side or top obstructions.  
b. For best all round sound propagation mount the unit at a height of 4.5 to 6m with  
50m clear radius all round.  
c. Figure 1 overleaf shows a polar plot of the sound output from the sirens in free  
space.  
Please note that the propagation of sound in air is affected by the following factors  
which must be accounted for when calculating the coverage of the siren:  
Variations of the propagation speed in the air  
Attenuation of the sound during propagation  
Wind and turbulence of the atmosphere  
Obstacles placed in the vicinity of siren and listener.  
Ambient noise levels  
d. The plot assumes ideal free-field conditions.  
The following losses must be taken into account during commissioning:  
Sound attenuation loss over distance in free-field conditions without obstructions.  
Distance in Metres  
GP6  
Audibility  
1
30  
100  
95  
200  
89  
500  
81  
1000  
75  
2000  
69  
135  
140  
145  
105  
110  
115  
GP10  
100  
105  
94  
86  
80  
74  
dB(A)  
GP12  
99  
91  
85  
79  
Attenuation in decibels per kilometre due to absorption of sound in air (10°C,  
90%RH).  
At 500 Hz frequency the attenuation is 1.6 dB(A)/kilometre  
Absorption due to fog in decibels per kilometre.  
At 500 Hz frequency the attenuation is 1.0 dB(A)/kilometre  
The two figures provided for sound absorption in clear air and fog are sound losses  
in addition to the typical sound losses experienced over distance indicated in the  
table above.  
 
GP6 and GP10 Single Ended Sirens - Polar Plot of Sound Output (dBA @ 1m)  
0
150  
145  
140  
135  
130  
125  
120  
345  
15  
330  
30  
315  
45  
300  
60  
285  
75  
GP6 Siren  
270  
90  
GP10 Siren  
255  
105  
240  
120  
225  
135  
210  
150  
195  
165  
180  
 
GP12 Double Ended Siren – Polar Plot of Sound Output (dbA @ 1m)  
0
15  
345  
30  
330  
315  
45  
60  
300  
285  
75  
270  
90  
255  
105  
240  
120  
135  
225  
210  
150  
195  
165  
180  
 

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