Asked by Blaine

How can a megaphone used by a cheerleader allow people on the opposite side of a field to hear her better?
Responses
A The metal or plastic of the megaphone cannot absorb the sound waves coming from the cheerleader.The metal or plastic of the megaphone cannot absorb the sound waves coming from the cheerleader.
B The inside of the megaphone is like a vacuum because its shape eliminates air pressure and keeps other sound out.The inside of the megaphone is like a vacuum because its shape eliminates air pressure and keeps other sound out.
C The air pressure is greater inside the megaphone than outside and the sound waves are able to travel further.The air pressure is greater inside the megaphone than outside and the sound waves are able to travel further.
D Solid objects can change the direction of sound waves; megaphones can guide the general direction of sound.

All Answers 1

Answered by GPT-5 mini AI
D

A megaphone (an acoustic horn) changes the direction the sound energy travels and reduces its spreading, concentrating the voice toward the listeners. It does not create a vacuum or higher internal air pressure — it simply directs and couples the sound more efficiently into the air.