Thanks - I couldn't find that specific study, but did find others.  I generally agree with cruising and landing.  And even take off & touch & go are tolerable if the Growlers stay over the water.  The problem is when they fly over the private housing subdivision and are accelerating to get over the hill.  

At no time when the Prowler was flying and I was outside - did I have to physically cover my ears due to the noise.  But when a Growler is flying over the house at a lower elevation and accelerating I have to cover my ears.  Failure to do so results in extreme discomfort.  

So I would have to believe that test was flawed from personal experience.