мегафон; рупор
amplifier
amplifier circuit
electronic amplifier
jet amplifier
antenna amplifier
radio-frequency amplifier
range amplifier
power amplifier (PA)
voice circuit
voice communications station
voice procedure
voice protection unit
voice-frequency
voice communication
by voice transmission
establishment of voice connection
voice connection
voice input
voice or data connection
voice output
voice recorder system
voice signal
voice terminal
voice warning
data above voice
data in voice
data under voice
automatic secure voice communication
digitized voice communication
voice information system
voice
voice channel