Beyerdynamic MM 1 - Technical Specifications; Application Overview; Detailed Specifications; Frequency Response and Polar Pattern

MM 1 — Condenser Measurement Microphone 4
EN
TECHNICAL SPECIFICATIONS
Transducer type .............. Condenser (back electret)
Operating principle .............................Pressure
Frequency response ....................... 20 - 20,000 Hz
(50 - 16,000 Hz ± 1.5 dB)
diuse field calibrated
Polar pattern ............................Omnidirectional
Sensitivity
(0 dB = 1 V/Pa) ..............15 mV/Pa (= -36.5 dBV) ± 1 dB
Nominal impedance ...............................160 Ω
Load impedance .................................≥ 2.2 kΩ
Max. SPL at
f = 1 kHz, k = 1%, R
L
= 2.2 kΩ .....................122 dBSPL
Signal-to-noise ratio
rel. to 1 Pa ....................................... > 57 dB
A-weighted equivalent SPL ..............approx. 26 dB(A)
Power supply ................... 12 - 48 V phantom power
Current consumption .....................approx. 1.9 mA
Output ..........................electronically balanced
Connection ..............................3-pin XLR, male
Dimensions:
Length ..........................................139 mm
Sha diameter ..................................19 mm
Head diameter ...................................9 mm
Weight ..............................................73 g
FREQUENCY RESPONSE & POLAR PATTERN
The displayed frequency response curve and polar pattern correspond to a typical production sample for this micro-
phone. Each microphone comes with an individual 0° frequency response. The individual compensation curves for 0°
and 90° free-field measurement can be requeed via the following link: www.beyerdynamic.com/mm1-regier
Frequency response curve ± 1.5 dB MM 1 0 dB = 15 mV/Pa
APPLICATION
The MM 1 has been developed for the calibration of
udio rooms, PA and ELA syems. In conjunction with a
spectrum analyser, the sound pressure levels of loud
-
speakers can be checked in addition to frequency
response measurements. Due to the slim housing with
the protruding microphone capsule, the influence on
the sound field is very low, so that a pressure build-up at
high frequencies is moly avoided.
The transmission pattern is selected so that an exactly
linear frequency response is achieved with diuse sound
input. This makes the calibration of several loudspeakers
in the udio paicularly easy and fa.
The MM 1 also provides valuable services when
inveigating sound signals in research, development
and indury.