On 12/2/2010 11:04 PM, XS11E wrote:
> "Chris > wrote:
>
>> Question is, can you hear the radio or are you outrunning those
>> sound waves too? Or, are the sound waves being generated at 1050
>> mph at their inception and being propelled faster than that, in
>> the forward direction, causing them (theoretically) to be heard?
>> Chew on that one! Inquiring minds want to know.
>
> Earphones!
>
>

Good Question!

The driver, radio, speakers, and air inside the cabin are all going
(hopefully anyway) the same speed. What do you think?

Or, if you happen to be in the cockpit of a fighter that is supersonic,
things quiet down. You can hear the earphones with no problems.
Remember the Concord? You could speak to another passenger in the cabin.

Something about Einstein may come into play.