April 3, 2000

Mr. Shelby Carr President, Quiet Flight 2710 Oak Lawn Suite 109 Dallas, TX  75219

Dear Shelby:

This letter is to express my deepest thanks for the job you and your Quiet Flight team has done in my Piper Saratoga.  My greatest concern for some time has been the well being of my grand children.  I have always had a concern for their hearing when they fly with me.  I have had a similar concern for my wife and daughter who don't like to wear headsets.  I had made many inquiries concerning active noise cancellation and not found anything available.  When I read the news clips about Quiet Flight in the AOPA magazine, I called you the next day.

My first flight with my grand children was an eye opener !  From my pilot seat, I was able to hear my wife in the middle seat and my grandson in the rear seat talking to each other.  This was the first realization of how much I "missed" the rumble of the propeller.  We have shared several flights since then and I am continuously amazed how you have taken the noised cacellation headset feeling and extended it throughout my plane.

I would also like to thank your installation team for doing an outstanding job of concealing the system in my plane.  The interior is like new and as you know I had a hard time finding the speakers and microphones.

Sincerely,

signed Martial R. Knieser, M.D.