Common Knowledge about IR
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Can IR systems work outdoors?IR microphone systems do not work outdoors. The IR signals from the transmitters (microphones) transmit out and receive through sensors and the receiver.
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Comparison on RF/IR/BLUETOOTH
IR
RF
BLUETOOTH
Modulation
FM
FM
GFSK
Sound Quality
GOOD
GOOD
NI
Avoid Disturbs/Good security
GOOD CUT OFF NOISE
NI
GOOD CUT OFF NOISE
Distance
Apprx. 15m
More than 20m
Apprx. 15~20m
Convenience
No need on Frequency pairs
Need frequent pairs
Need frequent pairs