Question

How does the loudspeaker increase the volume?

Answer 1

Answer:A megaphone increases the volume of sound by increasing the acoustic impedance seen by the vocal cords, matching the impedance of the vocal cords to the air, so that more sound power is radiated.

                           

Answer 2

Answer:

By increasing the electric power.

Explanation:

Loudspeakers will play loud when the cone vibrates a large amount, or soft when it moves a small amount. ... In the same way, sending a bigger pulse of electricity into a loudspeaker makes the cone move further and generates a louder noise. Quieter sounds are made by smaller pulses of electricity.

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