The softness or loudness of a sound depends on its _______

Options

A. amplitude
B. frequency
C. Oscillation
D. None of them

Answer

To answer the question, "The softness or loudness of a sound depends on its _______," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Sound Properties**:
- Sound has various properties, including loudness, pitch, and timbre. Each of these properties describes a different aspect of sound.

2. **Identifying Loudness**:
- Loudness is a measure of how strong or weak a sound is perceived by the human ear. It is often described in terms of how loud or soft a sound is.

3. **Relationship Between Loudness and Amplitude**:
- The loudness of a sound is directly related to the amplitude of the sound wave. Amplitude refers to the maximum displacement of particles in a medium from their rest position when a sound wave passes through.

4. **Mathematical Relationship**:
- Loudness is proportional to the square of the amplitude of the sound wave. This means that if the amplitude increases, the loudness increases significantly (since it is squared).

5. **Conclusion**:
- Therefore, the softness or loudness of a sound depends on its **amplitude**. The correct answer to fill in the blank is "amplitude."

### Final Answer:
The softness or loudness of a sound depends on its **amplitude**.