At 4.6 miles from the airport, a landing jet can be as loud as 91 decibels (comparable to a jackhammer at 50 feet). Jets circling to land or after take off could fly over any part of Readington any time of day or night. Most of Readington is within 5 miles of the airport.
On a normal landing approach, a jet aircraft will descend on a 3-degree glide slope. Thus, the plane should lose 300 feet in altitude for every for every 1.15 miles (6000 feet). Working backwards from the landing point, the plane will be 300’ above the ground at 1.15 miles; 600’ above the ground at 2.30 miles; 900’ above the ground at 3.45 miles, and 1350’ above the ground at 4.6 miles.
According to FAA data, at 1350’ a typical business jet, the Gulfstream II, can be measured at 91 decibels – similar to standing next to a running lawnmower or jackhammer. Unfortunately, the FAA data didn't include the intensity of the sound as the jet is closer to the ground nearer the runway, and a quick look at the web convinced us that the physics of sound is too complicated for us to calculate it for you. Suffice it to say, though, that jets will be very very loud as they get closer to the airport.
Currently small, Very Light Jets (VLJ's) can and do operate out of Solberg. These are the industry's quietest jets and do not require longer runways. The longer runways for an expanded Solberg Airport would accommodate large corporate jets, which according the to the FAA are significantly louder.