Dassault Aims for Noise Reduction in 7X Cabin
Dassault plans to introduce an exceptionally quiet cabin in its new Falcon 7X business jet. The company announced at EBACE in May that it expects to create a cabin with noise levels in the 52-dB range, about four decibels less than in the Falcon 900EX. Normal cabin conversation is typically conducted in the 55- to 70-dB range. The company has ruled out the use of active noise cancellation technology, saying the cabin noise that will be produced by the 7X is not in the low-frequency range, where such systems are most effective. Instead, the company plans to use layered foams and noise-dampening materials in the furniture, between the outer skin and the cabin shell and under the floor. The target is high-frequency noise produced by air passing over the airframe and noise produced by interior systems such as fans, pumps, servos and actuators.