How does ultrasound work? | Jacques S. Abramowicz

The video explains how bats use ultrasound to navigate in the dark by emitting high-frequency sound waves that bounce off surfaces, creating echoes that help them map their environment. This concept inspired the development of sonar technology during World War I and later medical ultrasound imaging. Medical ultrasound is a non-invasive technique used to visualize internal organs, particularly in fetal imaging. It uses high-frequency sound waves to create detailed images without harmful side effects. The video also highlights the advantages of ultrasound over other imaging technologies, emphasizing its safety and portability.

How do bats navigate in complete darkness?

• By using their eyes to see in the dark

• By emitting ultrasound waves and interpreting echoes

• By following the scent of their prey

• By using magnetic fields

What was one of the first uses of ultrasound technology?

• Mapping the surface of the moon

• Communicating with dolphins

• Measuring the depth of the ocean

• Detecting enemy submarines during World War I

Why is conductive gel used in medical ultrasound procedures?

• To cool down the ultrasound machine

• To prevent the patient from feeling pain

• To ensure sound waves travel effectively into the body

• To make the procedure faster

What is a key advantage of medical ultrasound over other imaging technologies?

• It is invasive and requires surgery

• It is the most expensive imaging technology

• It uses radiation to create images

• It has no known negative side effects when used properly

What frequency range do medical ultrasound waves typically fall into?

• 20 to 20,000 hertz

• 2 million to 10 million hertz

• 100 to 1,000 hertz

• 50,000 to 100,000 hertz