Which of the following is correct regarding emitted range of frequency of sound?

Options

A. Dolphin - Infrasonic sound
B. Bats - Sonic sound
C. Whale - Infrasonic sound
D. Elephant - Ultrasonic sound

Explanation

To determine which of the given statements regarding the emitted range of frequency of sound is correct, we first need to understand the classifications of sound frequencies: infrasonic, sonic, and ultrasonic.

### Step-by-Step Solution:

1. **Understand the Frequency Classifications:**
- **Infrasonic:** Frequencies less than 20 Hz. These sounds are below the audible range for humans.
- **Sonic:** Frequencies ranging from 20 Hz to 20 kHz (20,000 Hz). This is the audible range for humans.
- **Ultrasonic:** Frequencies greater than 20 kHz. These sounds are above the audible range for humans.

2. **Identify the Animals and Their Frequency Ranges:**
- **Dolphins:** Typically produce ultrasonic sounds, which are above 20 kHz.
- **Bats:** Also produce ultrasonic sounds, using echolocation to navigate and hunt.
- **Whales:** Some species produce infrasonic sounds, which are below 20 Hz, allowing them to communicate over long distances.
- **Elephants:** Communicate using infrasonic sounds, which are also below 20 Hz.

3. **Evaluate the Given Statements:**
- The question lists the following classifications:
- Dolphins: Infrasonic (Incorrect, they are ultrasonic)
- Bats: Sonic (Incorrect, they are ultrasonic)
- Whales: Infrasonic (Correct, they produce infrasonic sounds)
- Elephants: Ultrasonic (Incorrect, they are infrasonic)

4. **Conclusion:**
- The correct statement regarding the emitted range of frequency of sound is that **Whales produce infrasonic sounds**.

### Final Answer:
The correct option is that **Whales produce infrasonic sounds**.

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