Emergency siren. Loudspeaker warning system. Outdoor system of alert for population: sound amplifier with loudspeaker against the blue sky
Palabras clave
loudspeaker,
system,
emergency,
sky,
speaker,
warning,
megaphone,
announcement,
communication,
public,
danger,
sound,
alert,
blue,
siren,
alarm,
audio,
announce,
loud,
pole,
broadcast,
horn,
safety,
white,
information,
amplifier,
background,
attention,
message,
volume,
voice,
tower,
equipment,
technology,
storm,
shout,
object,
electric,
disaster,
electronic,
signal,
earthquake,
post,
crashing waves,
weather,
speak,
high,
cloud
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