How does a concert's electronic sound system make voices and instruments louder?
Show answer & explanation
Answer: Amplifiers supply stronger electrical signals to drive the speakers
Listeners' ears become more sensitive as the crowd grows — A larger crowd does not make everyone's ears more sensitive to produce the extra sound. The system adds electrical power, allowing speakers to move more air and radiate stronger sound waves. Loudness is not created just by having more listeners.
The system keeps the original sound bouncing around the venue — Repeated reflections are not how the electronic sound system adds power. Room reflections can affect the sound level and clarity, but amplification also works outdoors. The added energy comes from the electrical supply through amplifiers and speakers.
Amplifiers supply stronger electrical signals to drive the speakers ✓ — Power amplifiers strengthen the electrical signals that drive the speakers. The speakers convert that electrical energy into mechanical motion and then sound waves. The amplifier boosts an electrical signal; it does not directly multiply sound waves in the air.