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The primary sources of jet noise for a high-speed air jet (meaning when the exhaust velocity exceeds about 100 m/s; 360 km/h; 225 mph) are "jet mixing noise" and, for supersonic flow, shock associated noise. Acoustic sources within the "jet pipe" also contribute to the noise, mainly at lower speeds, which include combustion noise, and sounds ...
During daylight saving time, Queensland receives the show delayed by one hour. In 2007, the show began a trial and aired live into Queensland between 5:00 – 8.30am, with an extra Queensland-only half-hour. [60] This was unsuccessful, and in 2008 the show returned to its previous delayed telecast.
Today (also called The Today Show) is an American morning television show that airs weekdays from 7:00 a.m. to 11:00 a.m. on NBC.The program debuted on January 14, 1952. It was the first of its genre on American television and in the world, and after 73 years of broadcasting it is fifth on the list of longest-running American television serie
Aeroacoustics is a branch of acoustics that studies noise generation via either turbulent fluid motion or aerodynamic forces interacting with surfaces. Noise generation can also be associated with periodically varying flows. A notable example of this phenomenon is the Aeolian tones produced by wind blowing over fixed objects.
Rolls-Royce Conway Mk508 (1959) with hush kit attached. The most common form of hush kit is a multi-lobe exhaust mixer.This device is fitted to the rear of the engine and mixes the jet core's exhaust gases with the surrounding air and a small amount of available bypass air.
The World Today was an early morning news and current affairs radio programme on the BBC World Service, launched in 1999, and broadcast from 3:00 to 8:30 (GMT) daily as of 2011. It consisted of news bulletins on the hour and half-hour, serious international interviews and in-depth reports of world news.
Today Today was a drivetime radio show on Australia-wide radio station Triple J, broadcast between 3:00pm and 5:30pm weekdays during 2004 and 2005. The title is a parody of the Australian current affairs program Today Tonight on Channel Seven .
The Pratt & Whitney J57 (company designation: JT3C) is an axial-flow turbojet engine developed by Pratt & Whitney in the early 1950s. The J57 (first run January 1950 [1]) was the first 10,000 lbf (45 kN) thrust class engine in the United States.