How can we increase or decrease the amplitude of the vibrations?

Explanation

To increase or decrease the amplitude of vibrations, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Amplitude**:
- Amplitude is defined as the maximum displacement of a vibrating object from its mean (rest) position. In the context of sound waves, it refers to the height of the wave from the central line to its peak.

2. **Identify the System**:
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