SILENT AIRCRAFT

Home How do we perceive sound? Why are aircraft noisy and what can be done about it? Concept design of an ultra low noise, fuel efficient aircraft Low noise approaches Future challenges The 'Silent' Aircraft Community People Publications Press... Initially, there are 10 hairdryers all running at once. When 5 of them are switched off, the sound energy produced is halved (5÷10), but we barely hear a reduction in noise. Listen to 10 hairdryers followed by 5. (you will need RealPlayer to listen to this sound file)