Beyerdynamic MM1 Instrucciones De Uso página 4

MM 1 — Condenser Measurement Microphone
APPLICATION
The MM 1 has been developed for the calibration of
studio rooms, PA and ELA systems . 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 mostly avoided .
TECHNICAL SPECIFICATIONS
Transducer type . . . . . . . . . . . . . . Condenser (back electret)
Operating principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pressure
Frequency response . . . . . . . . . . . . . . . . . . . . . . . 20 - 20,000 Hz
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 = 2 .2 kΩ . . . . . . . . . . . . . . . . . . . . . 122 dBSPL
L
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 requested via the following link: www.beyerdynamic.com/mm1-register
Frequency response curve ± 1 .5 dB
(50 - 16,000 Hz ± 1 .5 dB)
diffuse field calibrated
The transmission pattern is selected so that an exactly
linear frequency response is achieved with diffuse sound
input . This makes the calibration of several loudspeakers
in the studio particularly easy and fast .
The MM 1 also provides valuable services when
investigating sound signals in research, development
and industry .
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
Shaft diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 mm
Head diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 mm
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 g
MM 1
4
0 dB = 15 mV/Pa