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Applications of Sound Waves

Physics ⇒ Waves and Sound

Applications of Sound Waves starts at 9 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Applications of Sound Waves. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 11
A bat emits a sound at 40 kHz and hears the echo after 0.02 seconds. If the speed of sound in air is 340 m/s, how far is the object?
A ship uses sonar to measure the depth of the ocean. If the sound wave takes 4 seconds to return and the speed of sound in water is 1500 m/s, what is the depth of the ocean?
Describe how echolocation is used by dolphins.
Describe how the Doppler effect is used to measure the speed of a moving vehicle by police radar.
Describe one industrial application of ultrasound.
Explain how bats use sound waves for navigation and hunting.
Explain how sound waves are used in fish finders.
Explain how ultrasound is used in cleaning delicate objects.
Explain why ultrasound is preferred over X-rays for imaging soft tissues in the body.
A Doppler ultrasound is used to measure the speed of blood flow in an artery. If the emitted frequency is 5 MHz and the observed frequency shift is 2 kHz, calculate the speed of blood flow. (Assume the speed of sound in blood is 1570 m/s and the blood is moving directly towards the probe.)
A factory uses ultrasonic waves to detect flaws in a metal rod. If a flaw is located 0.2 m below the surface and the speed of sound in the metal is 5000 m/s, how long does it take for the ultrasonic pulse to travel to the flaw and back to the detector?
A medical ultrasound device emits pulses at a frequency of 3 MHz. If the speed of sound in human tissue is approximately 1540 m/s, what is the wavelength of the ultrasound in the tissue?
Describe how the principle of resonance is applied in the design of musical instruments such as guitars or violins.
Explain how the principle of reflection and refraction of sound waves is utilized in the design of concert halls to enhance sound quality.