Ultrasound - High-Frequency Sound

Ultrasound, with a frequency above human hearing, is used in medicine for imaging and in industry for detecting structural defects. In nature, animals like bats and dolphins use ultrasound for navigation and communication.

What is the upper limit of human hearing in terms of frequency?

• 10,000 Hertz

• 15,000 Hertz

• 25,000 Hertz

• 20,000 Hertz

Which of the following is a medical application of ultrasound?

• Analyzing blood samples

• Monitoring heart rate

• Imaging the inside of the human body

• Measuring blood pressure

In industry, ultrasound is used to detect what?

• Electrical conductivity

• Chemical compositions

• Cracks and defects in solid structures

• Temperature changes

Which animal is known to use ultrasound for navigation?

• Bats

• Lions

• Cats

• Elephants

How do dolphins utilize ultrasound?

• To attract mates

• To regulate body temperature

• To navigate and communicate

• To find food