Common name: Neumann MM 5
Production Status: Discontinued / Vintage
The MM 5 is the third measurement microphone manufactured by Georg Neumann GmbH from 1959 to 1970. The microphone faetures improved performance compared to the previous models. The microphone body is in common with the MM 3 and used a similar amplifier circuit with a Telefunken AC 701 k tube. A long neck connects the capsule to the microphone body to avoid sound field perturbation and reflections produced by the large microphone body. A calibrated MM 5 extra small pressure capsule is placed at the neck’s top. The diaphragm is nickel made and smaller that the others (7.5 mm) for increased high frequencies measurement ability. It uses the same PSU and cables as the M 49 and M 50 microphones. A pistonphone calibration machine was manufactured for measurement microphone calibration. The frequency response range is increased to 20 -40,000 Hz (+/- 1 dB to 16 kHz – +/- 3 dB to 40 kHz). The MM 5 calibration specifications were checked in cooperation with the Natural Metrology Institute in Braunschweig (now Physikalisch-Technische Bundesanstalt, the German equivalent of National Bureau of Standards).