26Oct

What is the difference between an ANR and a PNR headset?

ANR stands for Active Noise Reduction, where a microphone picks up the external noise and a mirror of the sound is created electronically and played back out to the ear cups. This effectively cancels out the external noise. It can be extremely effective at removing ambient sounds creating a very clear headset for pilots, protecting your hearing from engine noise. They are design to cancel low frequency sound, so speech, engine noise changes and airflow are easily picked up. They...

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08Jun

What are the differences between the Icom A25 models and packages ?

The Icom A25 radio replaced the A6 and A24 models. The CE version is a COM transceiver only and the NE version also has a VOR/LOC receiver and a bluetooth headset interface built-in. Both units have the same radio features and take the same accessories. These units come in two packages - SPORT and PRO. The SPORT package comes with an Alkaline battery case, aircraft power supply, antenna, belt clip and handstrap. The PRO package includes a rechargeable Lithium battery instead of the alkaline case,...

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08Jun

What is the difference between low and high impedance microphones ?

Electret microphones which are high impedance and require a drive voltage to operate. Electret microphones are very sensitive and often contain a noise-cancelling circuit to reduce background noise. Standard GA headsets use electret microphones Dynamic microphones are low impedance. They are not sensitive and usually only pick up noise within a few inches of the microphone so they tend not to pick up wind or engine noises and are ideal for noisy or open cockpit aircraft. Military headsets...

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