Klaxon - GP12

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Contents

A HALMA COMPANY klaxon 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 lis ...