A Tutorial on Active Noise Reduction
by the technical staff of Lightspeed Aviation
This is a five-part series on Active Noise Reduction in General Aviation.
It came about because hundreds and hundreds of you have been asking good
questions about ANR technology and its advantages in airplanes. This series
is intended to provide G.A. pilots with a fairly technical and thorough
understanding of this technology and the important criteria that will affect
performance and long term satisfaction. While not exhaustive, you should
"graduate" with a clear picture of the role active cancellation can have on
your flying safety, comfort and overall enjoyment.
Section 1: The
Basics of ANR — a review of how active noise reduction works and
the design variables involved; why it's so difficult to design a really
effective ANR headset, even though the basic principles of ANR are rather
Section 2: Acoustic
Issues — how to measure, understand and compare the manufacturer's
performance figures and noise cancellation curves...and why some of the
figures you see in headset ads are meaningless.
Section 3: Airplane
Issues — the nature of the noise spectrum we're trying to cancel,
and the importance of good low-frequency attenuation.
Section 4: Ergonomic
and Interface Issues — what's involved in the design of a headset
that we don't mind wearing for many hours!
Section 5: Optimizing
Your Flying Experience — how noise impacts your health, safety and
competence as a pilot, and why active cancellation makes flying a "better"
This is a two-way medium, so please be sure to send us your
Go to Section 1 >>