On which factor the pitch of the sound depends ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Pitch**:
- Pitch is a term used to describe the perceived frequency of a sound. It indicates how high or low a sound is. For example, a high-pitched sound is shrill, while a low-pitched sound is dull.

2. **Identifying Characteristics of Sound**:
- Sounds can be characterized by their frequency, amplitude, and quality. Among these, frequency is the key factor that affects pitch.

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