Amplitude is an important part of how loud a sound is.

It measures how far the particles in a medium move from their resting spot when sound waves go through.

The bigger the amplitude, the more energy the sound wave has.

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1. How Amplitude Relates to Intensity:
   • Sound intensity is about how much power there is in a certain area. It's measured in watts per square meter (W/m²).
   • Amplitude and intensity are directly connected.
   • This means if the amplitude gets twice as big, the intensity becomes four times greater!

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2. How We Perceive Loudness:
   • How humans hear loudness works in a special way.
   • If the loudness goes up by 10 decibels (dB), we often feel like the sound has doubled in loudness.
   • For example, a sound at 10 dB feels twice as loud as a sound at 0 dB. This shows how amplitude affects our experience of sound intensity.