CNN CNN Newsroom April 4, 2014 18:18:00
Out -- or the generators are putting out the right amount of energy. if they do an analysis and see that the 400-hertz tone is down to 390, they can tell that the electrical system was being loaded up for some reason. that's one thing. another thing is each of the pilots has three microphones they can use. one is the boom mic they use most of the time, certainly in takeoffs, landings, decents. and then the high fidelity mic they use without the boom mic, and the third is in the oxygen mask. >> even in the oxygen mask in case of an emergency. >> right. >> wow. >> that's automatic. if somebody t...
Source: archive.org