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Alarms for the constructions. Alarm.
The alarm element is formed generally by a siren (or bell) that it notices of
the occurrence of an intrusión detected by the system, by means of a sonorous
signal of high level. In some cases, also it can include some type of visual
signaling, like beacons and flashed (flash), for those people who have hearing
problems or when a high level of atmospheric noise exists. The outer siren is
placed within a cabinet for its protection, and it settles in the facade of the
house, commerce or industry to protect. In addition to its function to alert in
the cases in that an intruder has detected it, the outer siren is a dissuasive
element of by himself, since it warns of the existence of an alarm system
installed in the address. On the other hand, the inner siren serves to act like
helping of the outside, so that the two sirens sound at the same time. If the
intruder destroys the outer siren, is working the inner siren within the place
to protect. In all the cases, these sirens emit a sound of about 120 decibels (equipable
to the sound of an ambulance) and have a protection to antidesar me that send a
signal to the power station, in the cases in that it is tried to sabotage his
correct operation.
In order to determine the type of alarm to install it must
consider some factors like the level of environmental noise, the type and
quality of the environmental sound, the duration of the required signal, the
acoustic level wished and the power supply available. For that reason, for his
correct installation it is necessary to consider the presence of sources of
sound in the premises to protect, like for example equipment of conditioned air,
stereophonic, televising systems, et cetera, that possibly prevent hearing of
the alarm sirens. On the other hand, the surroundings in which a luminous
signaler must be installed are what the type of product determines so much as
necessary the light intensity for each application. For that reason, a designed
luminous warning device for industrial use that incorporates a great luminous
exit never could be adapted for an address and vice versa. |
