aerodynamic noise การใช้

• The helicopter main and tail rotors also give rise to aerodynamic noise.
• This type of aerodynamic noise is mostly low frequency determined by the rotor speed.
• You hear a swoosh, which is the aerodynamic noise of the wind going over the blades.
• He is known internationally as a valve specialist and is an expert on aerodynamic noise of gases.
• A further increase in flow rate resulted suddenly in many vortices, aerodynamic noise and a great increase in resistance to flow.
• The sound sources modeled must include engine noise, tire noise, and aerodynamic noise, all of which vary by vehicle type and speed.
• In aeroacoustic studies, both theoretical and computational efforts are made to solve for the acoustic source terms in Lighthill's equation in order to make statements regarding the relevant aerodynamic noise generation mechanisms present.
• The Airbus Industrie has also taken the initiative to make its aircraft quieter on approach, a flight phase during which the aerodynamic noise generated by an airliner is at its highest, due to the efforts made by its engine manufacturers.
• Noise from transportation is typically emitted by the machinery ( e . g . the engine or exhaust ) and aerodynamic noise ( see aerodynamics and aircraft noise ) caused by the compression and friction in the air around the vessel during motion.
• "' Traffic operations "'noise is affected significantly by vehicle speeds, since sound energy roughly doubles for each increment of ten miles an hour in vehicle velocity; an exception to this rule occurs at very low speeds where braking and acceleration noise dominate over aerodynamic noise.