Helicopter noise reduction is a topic of research into designing helicopters which can be operated more quietly, reducing the public-relations problems...

Active noise control (ANC), also known as noise cancellation (NC), or active noise reduction (ANR), is a method for reducing unwanted sound by the addition...

have largely involved the reduction of several different signatures typically generated by a rotorcraft, including those of noise, radar, and infrared. In...

This is a list of noise topics. 1/f noise A-weighting Ambient noise level Antenna noise temperature Artificial noise Audio noise reduction Audio system measurements...

Much of the noise in propeller aircraft comes equally from the propellers and aerodynamics. Helicopter noise is aerodynamically induced noise from the main...

needed] At the end of the 20th century, designers began working on helicopter noise reduction. Urban communities have often expressed great dislike of noisy...

without the noise. See noise-canceling microphone. Helicopter pilots rely on this technology to speak on the radio. Acoustic signature Noise reduction, for electronic...

aims for a 25% cost reduction per distance over a conventional helicopter. On 20 June 2017 at the Paris air show, Airbus Helicopters revealed a high-speed...

development in BVI prediction. Rotorcraft Helicopter rotor BERP rotor Wingtip vortices Helicopter noise reduction Computational fluid dynamics Aeroacoustics...

tail rotor are obtained, such as a reduction in tip vortex losses and the potential for substantial noise reduction, while also shielding both the tail...