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David Clark headsets are an inculcated brand on the world market. An important part of the systems for communication is for pilots are their headset. Without an appropriate and accredited headset, the security of the pilot and the passengers (if there are any) will be exposed to risk. In fact, the security of all on board will be threatened, if the pilot cannot send or receive messages through the headsets. The quality of the connection is very important when talking about security.
from: http://ezinearticles.com/?The-David-Clark-Headset-Is-A-Useful-Product-For-Different-Environments&id=5493710
