Jet noise

In aeroacoustics, jet noise is the field that focuses on the noise generation caused by high-velocity jets and the turbulent eddies generated by shearing flow. Such noise is known as broadband noise and extends well beyond the range of human hearing (100 kHz and higher). Jet noise is also responsible for some of the loudest sounds ever produced by mankind. In aeroacoustics, jet noise is the field that focuses on the noise generation caused by high-velocity jets and the turbulent eddies generated by shearing flow. Such noise is known as broadband noise and extends well beyond the range of human hearing (100 kHz and higher). Jet noise is also responsible for some of the loudest sounds ever produced by mankind. The primary sources of jet noise for a high-speed air jet (meaning when the exhaust velocity exceeds about 100 m/s) are 'jet mixing noise' and, for supersonic flow, shock associated noise. Also, acoustic sources within the 'jet pipe' also contribute to the noise, mainly at lower speeds, which include combustion noise and sounds produced by interactions of a turbulent stream with fans, compressors, and turbine systems.