Not only that, if 2 people talk at once they can cancel each other out and neither can be heard by anyone else.
Much of aviation is still based on pre WWII tech and practices like this and people underestimate how slow and difficult it is to change. Many piston aircraft still run on leaded gas, for example, the last existing market for it in the US.
Much of aviation is still based on pre WWII tech and practices like this and people underestimate how slow and difficult it is to change. Many piston aircraft still run on leaded gas, for example, the last existing market for it in the US.