浜辺
alarm
alert
amp
amplifier
audio
background
blue
clear
communication
community
earthquake
electric
emergency
help
high
horn
information
line
loud
loudspeaker
megaphone
news
newspaper
object
old
outdoors
people
pillars
post
power
public
security
siren
sky
sound
speak
speaker
storm
system
talk
tower
tsunami
voice
volume
warning