How is loudness related to the amplitude?

Explanation

**Step-by-Step Solution:**

1. **Understanding Amplitude and Loudness**:
- Amplitude refers to the maximum extent of a vibration or oscillation, which in the case of sound waves, relates to how far the particles of the medium move from their rest position.
- Loudness is the perception of the strength of a sound, which is how we interpret the intensity of sound waves.

2. **Relationship Between Amplitude and Loudness**:
- The loudness of a sound is directly related to the amplitude of the sound wave. This means that as the amplitude increases, the loudness also increases.
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