What are ultrasounds? Give their uses in different fields of life.

Ultrasound refers to sound waves with frequencies above 20 kHz, which humans cannot hear.

Uses:

Medical field: Ultrasound imaging (e.g., fetal monitoring, kidney stone detection).

Industry: Detecting cracks in metal structures.

Navigation: SONAR (for detecting objects underwater).

Security: Ultrasonic motion detectors.

Related Questions:

  1. Explain how sound is produced and propagated.
  2. Describe the characteristics of sound and their significance.
  3. Explain SONAR and its applications.
  4. What is intensity of sound? What is the range of intensity of audible sound? Differentiate between loudness and intensity of sound.
  5. Define intensity level. Derive the formula for its decibel scale.
  6. Differentiate between noise and music. Explain how noise is a nuisance.
  7. What is acoustics and acoustic protection? How does their study help in the construction of different structures?
  8. What is the audible frequency range? Explain in detail.
  9. Why does sound require a medium to travel?
  10. What is the effect of humidity on the speed of sound?
  11. What is the difference between audible, infrasonic, and ultrasonic sounds?
  12. What is the relation between frequency and pitch of a sound?
  13. Why do we hear sound more clearly at night than during the day?
  14. Show that frequency and time period of waves are inverse of each other.
  15. Why does a simple pendulum have a longer time period on the Moon than on Earth?
  16. How does damping affect oscillatory motion?
  17. What is the significance of wave speed in a medium?
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