Interior noise studies for general aviation types of aircraft, part II: Laboratory studies†

Laboratory tests were conducted on a light aircraft fuselage to investigate its sound transmission paths and interior noise characteristics. The acoustic attenuation characteristics and the relative effectiveness of different parts of the fuselage for sound attenuation were studied. The studies show that the fuselage provides an acoustic attenuation of about 20 dB with the windows and metallic areas of the fuselage transmitting virtually equal amounts of sound energy.