Name the type of waves which are used for sound ranging.

Explanation

### Step-by-Step Text Solution:

1. **Understanding Sound Ranging**:
- Sound ranging is a technique used to determine the distance to an object by using sound waves. It is commonly used in underwater applications, such as sonar.

2. **Identifying the Type of Waves**:
- The question specifically asks for the type of waves used in sound ranging. The two types of waves that are relevant here are:
- **Ultrawaves**: These are waves that have frequencies higher than the audible range for humans.
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