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Questions and Answers
What is the approximate upper audible limit of human hearing in healthy young adults?
What is the approximate upper audible limit of human hearing in healthy young adults?
- 20 kilohertz (correct)
- 20 hertz
- 20 gigahertz
- 20 megahertz
In which field is ultrasound imaging or sonography often used?
In which field is ultrasound imaging or sonography often used?
- Engineering
- Medicine (correct)
- Agriculture
- Astronomy
What did Francis Galton invent in 1893, which produced ultrasound?
What did Francis Galton invent in 1893, which produced ultrasound?
- Galton thermometer
- Galton compass
- Galton whistle (correct)
- Galton telescope
What is the frequency range in which ultrasonic devices operate?
What is the frequency range in which ultrasonic devices operate?
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For what purpose is ultrasound used in the nondestructive testing of products and structures?
For what purpose is ultrasound used in the nondestructive testing of products and structures?
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Study Notes
Human Hearing and Ultrasound
- The approximate upper audible limit of human hearing in healthy young adults is 20,000 Hz.
- Ultrasound imaging or sonography is often used in the field of medicine.
- Francis Galton invented the whistle, which produced ultrasound, in 1893.
- The frequency range in which ultrasonic devices operate is above 20,000 Hz.
- Ultrasound is used in the nondestructive testing of products and structures to detect flaws or defects.
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