ANR Active Noise Reduction Module

What is ANR? ANR is a system of actively seeking
ambient noise & suppressing it using a microphone,
electronics & a speaker. This system samples the
noise right at your ear, reverses it 180 degrees, and
plays it back to actively cancel the noise.

What frequency range is the ANR most effective? From 50-1000Hx, where most prop blast,
engine noise, and wind noise is located.
What is the standard power source? The units
require 9 volts DC, which is provided from one 9-volt
transistor battery located in the battery box included
with the kit. Typical battery life in most GA aircraft
is 15-20 hours. If your battery dies while in flight,
the ANR units are fail safe. The headset will still
operate as a normal passive headset with all transmit & receive capabilities intact.

Can I install the ANR Kit myself? Kit includes
everything you need to convert your headset to
ANR. It can be installed by anyone with soldering
experience. The ANR units weigh 34.6 grams in
case you are wondering. Overall effect on weight is
negligible.