G500 Demonstrates Low Decibel Levels

A low-flying jet makes a distinct and noticeable sound.

Minimizing that noise was among the challenges Gulfstream engineers faced in developing the new Gulfstream G500. To operate out of the world’s most noise-sensitive airports, the G500 needs to take off and climb as well as approach the ground and land with minimal auditory notice.

Gulfstream recently tested the G500’s noise performance at a desert airfield near Bakersfield, California. A team of acousticians and flight test engineers, joined by representatives from the U.S. Federal Aviation Administration and the European Aviation Safety Agency, set up a microphone array near the runway and along the flight path. The array measured flyover noise as the G500 test aircraft passed overhead at a range of power settings and altitudes.

Noise pollution is a major consideration at airports where flight paths cross above highly populated residential areas, such as London City, Long Beach and John Wayne Airport in Santa Ana, California. The G500’s aim is to access these locations and meet goals that go beyond the limits needed for FAA and EASA certification.

New Gulfstream aircraft traditionally best certification requirements for flyover noise. Each of the current production models—the G650ER, G650, G550, and G280—not only meets today’s guidelines but does so with enough margin to satisfy new standards for quiet that are set to go into effect in 2020.