Amplifier and Processing Equipment for Noise Monitoring Unit
Cubicle containing amplifier, processing equipment, and telephone connection interface for noise monitoring unit.
Noise monitoring unit formerly installed at The Green, Wraysbury, consisting of pole-mounted microphone connected to cubicle containing amplifier, processing equipment, and interface for telephone connection to central computer at Heathrow Airport, 1955-1964
Cubicle containing amplifier, processing equipment, and telephone connection interface for noise monitoring unit.
Microphone for noise monitoring unit.