When sound comes from a moving source, the sound waves in front of the source are

compressed, causing a shift toward higher frequency

compressed, causing a shift toward lower frequency

expanded, causing a shift toward higher frequency

expanded, causing a shift toward lower frequency

Question

When sound comes from a moving source, the sound waves in front of the source are

 compressed, causing a shift toward higher frequency

 compressed, causing a shift toward lower frequency

 expanded, causing a shift toward higher frequency

 expanded, causing a shift toward lower frequency

wolfe8 · Answer

Welcome to OpenStudy. Note that frequency is to pitch and amplitude is to loudness. And try to picture it. :) What do you think?

topdog · Answer

I don't know

wolfe8 · Answer

This will help you understand and remember it! https://www.youtube.com/watch?v=8xnNPrrWGh0

anonymous · Answer

i would have to say their exspanded

wolfe8 · Answer

@Nakoma-Mika-Turner , watch the video too :) It helps.

anonymous · Answer

i completly for got that they pile up that how it creates a sounic bom

anonymous · Answer

sound barior*