Liar, not even 40 points....
No. Sorry. A sound wave is a mechanical wave. There's nothing electromagnetic about it.
Answer:

This delay affect conversations in the sense that recipient will be receive the message just 2.56 seconds after the message was sent.
Explanation:
The laser pulse has an ondulatory nature as electromagnetic wave, which can travel in the void. Speed of light is constant and distance between Earth and the Moon is:



This delay affect conversations in the sense that recipient will be receive the message just 2.56 seconds after the message was sent.
You will have to redefine the machine's boundaries.