Plz answer this question....

Question

assume that u r travelling with ur radio at a speed of sound ..... then if u switch on the radio ii u hear the sound....plz explain

Answer 1

Are you considering attenuation? Or is this an ideal case? In and ideal case if you travelling at the speed of sound then you will still hear the radio because you are exactly where the acoustic tremors are.

Answer 2

As you would most likely be in an enclosed capsule of some kind  the radio and the air surrounding the radio and your ears would all be moving at the same relative speed. So I believe you would be able to hear it.

If you were not all enclosed then the sound wave would constantly be behind you and you would not hear the radio.

See link below.