Physics
Amplitude Reinforcement
Quick fact
In just the right conditions, amplitude reinforcement can double the amplitude of a wave, which quadruples its energy—since energy is proportional to the square of amplitude.
Why this is interesting
Have you ever noticed how two speakers playing the same sound can make it seem louder than just one? That's not just more sound sources—it's amplitude reinforcement, a process where waves literally add up to create a bigger wave.