The range above 20,000 Hz is known as ______ .

Options

A. ultrasonic range
B. infrasonic range
C. sonic range
D. None of them

Answer

To solve the question "The range above 20,000 Hz is known as ______", we can follow these steps:

### Step 1: Understand the Frequency Ranges
- Sound can be categorized based on its frequency, which is measured in Hertz (Hz).
- Frequencies below 20 Hz are called infrasonic sounds.
- Frequencies between 20 Hz and 20,000 Hz are considered audible sounds (the range humans can hear).
- Frequencies above 20,000 Hz are referred to as ultrasonic sounds.

### Step 2: Identify the Correct Term
- Since the question specifically asks for the range above 20,000 Hz, we need to identify the correct term from the options given.
- The options provided are:
1. Ultrasonic range
2. Infrasonic range
3. Sonic range
4. None of them

### Step 3: Match the Frequency Range to the Correct Term
- Based on our understanding:
- Infrasonic range: Below 20 Hz
- Sonic range: Generally refers to audible sounds (20 Hz to 20,000 Hz)
- Ultrasonic range: Above 20,000 Hz

### Step 4: Conclusion
- Therefore, the correct answer to the question is "Ultrasonic range".

### Final Answer:
The range above 20,000 Hz is known as **Ultrasonic range**.

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