Beyerdynamic MM1 Eletret Condenser Measurement Microphone Overview:

The MM 1 is a measurement microphone which has been designed specifically for measuring sound reinforcement and PA-systems. It is designed to work with spectrum analysers for measuring frequency response and sound pressure levels of loud speaker systems. The MM 1 is the ideal microphone for the measurement of audio signals in the research, development, for reverberation testings and other applications. The narrow tubular construction ensures that the microphone has negligable influence on the sound field so that an increase in sound pressure is avoided with high frequencies. A natural reproduction is achieved due to the linear frequency response.

Each microphone is supplied with a printout of an individually measured 0 frequency response curve. The measured data can be requested by sending the serial number.

Features:

• Electret condenser measurement microphone with linear frequency response
• Omnidirectional polar pattern
• Calibrated open circuit voltage
• Narrow tubular construction to minimize the influence on the soundfield

Specifications:

• Transducer type: Condenser (back electret)
• Operating principle: Pressure
• Frequency response: 20 – 20,000 Hz (50 – 16,000 Hz 1.5 dB)
• Polar pattern: Omnidirectional, diffuse field calibrated
• Open circuit voltage at 1 kHz: 15 mV/Pa (= -36.5 dBV) 1 dB
• Nominal impedance: 160
• Nominal load impedance: 2.2 k
• Max. SPL at f = 1 kHz, k = 1%, RL = 2.2 k: 122 dBSPL
• S/N ratio rel. to 1 Pa: > 57 dB
• A-weighted equivalent SPL: approx. 26 dB(A)
• Power supply: 12 – 48 V phantom supply
• Current consumption: approx. 1.9 mA
• Output: electronically balanced
• Connection: 3-pin XLR male
• Dimensions:
• Length: 133 mm
• Shaft diameter: 19/9 mm
• Head diameter: 9 mm
• Weight (w/out cable): 88 g