MICROPHONES
Introduction
Use the Confidea-D MIC30SL (30 cm) - D MIC40SL (40 cm) - D MIC50SL (50 cm) removable microphones
with the different delegate and chairman units. This microphone ha a unidirectional response for optimum
performance even in noisy conditions, and has a very low susceptibility to RF-interference from mobile
phones.
Electrical And Acoustic Properties
Parameter Value
Transducer type Back electret (condenser)
Operating principle Pressure gradient
Polar pattern Uni-directional, cardioïd
Nominal impedance Bias resistor = 1k2
Vdd = 3.3 V DC,
SPL = 1Pa
Max.SPL at 1 kHz 110 DB SPL (1% THD+N)
Signal to noise ratio >67 dB(A)
Free field sensitivity 9.4 mV/Pa, ±3 dB @ 1 kHz or
(-40.5 dB, 0 dB = 1 V/Pa @ 1 kHz)
Power supply 3.3 V DC, 0.5 mA
Consumption 0.5 mA (without LED ring);
max. 25 mA (with illuminated ring)
MICRO PHO NES 33
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