мікрофон для підслуховування крізь стіни (напр. мікрофон-стетоскоп)
wall listening device
wall-to-wall turning diameter
ear-worn microphone
ear-worn radio microphone
microphone switch box and neck strap
wireless microphone
talk-back microphone
integral microphone
mask microphone
lip-type microphone
standard microphone
listening post
listening silence
listening surveiilance
check for listening devices
underwater listening post
gaining information by use of listening posts
listening device
surreptitious listening
surreptitious listening device
radio listening service
passive listening
passive listening device
air listening post
blast wall
back-wall
wall cooling
wall of a cartridge case
wall of shell
dividing wall
corrugated wall
perforated wall