MICROPHONES
Introduction
Use the Confidea PLM401F (40 cm) removable microphone (Mike) with the
Wireless Units
. This
microphone has 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)
MICROPHONES
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