Sound in Medicine: Physics and Perception
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Questions and Answers

What is the medical use of sound waves in breaking kidney stones?

  • To create a light wave
  • To create a static charge
  • To shatter the stones and avoid surgery (correct)
  • To measure weather conditions

    • What is the principle behind the Doppler Effect?

  • The change in frequency of the sound wave
  • The compression of sound waves between the moving object and the observer (correct)
  • The change in pitch of the sound wave
  • The increase in distance between the moving object and the observer

    • What is the actual change in the sound wave during the Doppler Effect?

  • A change in amplitude
  • No change in frequency (correct)
  • A change in pitch
  • A change in frequency

    • What is the purpose of using Doppler sound waves in the National Weather Service?

    <p>To measure weather conditions</p> Signup and view all the answers

    What is the relationship between the distance and the sound wave during the Doppler Effect?

    <p>The distance decreases as the sound wave approaches</p> Signup and view all the answers

    What is lightning?

    <p>A type of light wave</p> Signup and view all the answers

    What is sound in medicine?

    <p>A vibration that propagates through a medium</p> Signup and view all the answers

    What type of wave can sound propagate as in solids?

    <p>Transverse wave</p> Signup and view all the answers

    What is the role of the sound source in sound propagation?

    <p>It creates vibrations in the surrounding medium</p> Signup and view all the answers

    What happens to the particles of the medium as the sound wave propagates?

    <p>They vibrate in place</p> Signup and view all the answers

    What three factors affect the behavior of sound propagation?

    <p>Medium, distance, and time</p> Signup and view all the answers

    What happens to the pressure, velocity, and displacement of the medium at a fixed distance from the source?

    <p>They vary in time</p> Signup and view all the answers

    What are the two fundamental elements of sound?

    <p>Pressure and time</p> Signup and view all the answers

    What is the horizontal axis representing in Figure 2?

    <p>Time</p> Signup and view all the answers

    What is a complex sound wave typically separated into?

    <p>Component sound wave frequencies</p> Signup and view all the answers

    What is a common way to simplify sound waves?

    <p>Describe them in terms of sinusoidal plane waves</p> Signup and view all the answers

    What is the purpose of breaking down a complex sound wave into its component parts?

    <p>To understand the sound more fully</p> Signup and view all the answers

    What is the typical graphical representation of a sound wave?

    <p>Pressure over time graph</p> Signup and view all the answers

    What is the main difference between ultrasound and audible sound?

    <p>Humans cannot hear ultrasound</p> Signup and view all the answers

    What is the approximate frequency limit of human hearing in healthy young adults?

    <p>20 kilohertz</p> Signup and view all the answers

    What is the definition of ultrasound according to the American National Standards Institute?

    <p>Sound at frequencies greater than 20 kHz</p> Signup and view all the answers

    What is the main reason for the upper frequency limit of human hearing?

    <p>Limitations of the middle ear</p> Signup and view all the answers

    What is the original meaning of the acronym Sonar?

    <p>Sound Navigation and Ranging</p> Signup and view all the answers

    What is a common use of ultrasound in underwater range finding?

    <p>Sonar</p> Signup and view all the answers

    What is the function of the outer ear?

    <p>To collect sound and direct it into the ear</p> Signup and view all the answers

    What is the tympanic membrane also known as?

    <p>Eardrum outer layer</p> Signup and view all the answers

    What is the function of the Eustachian tube?

    <p>To drain fluid from the middle ear into the throat</p> Signup and view all the answers

    What is the cochlea responsible for?

    <p>Transforming sound into nerve impulses</p> Signup and view all the answers

    What is the main function of the semicircular canals?

    <p>To send information on balance and head position</p> Signup and view all the answers

    How many parts does the ear consist of?

    <p>Three</p> Signup and view all the answers

    Ultrasound has different physical properties than audible sound.

    <p>False</p> Signup and view all the answers

    The upper frequency limit of human hearing is 20 hertz.

    <p>False</p> Signup and view all the answers

    Ultrasound devices can operate at frequencies as low as 10 kHz.

    <p>False</p> Signup and view all the answers

    Ultrasound is used only in the medical field.

    <p>False</p> Signup and view all the answers

    The American National Standards Institute defines ultrasound as sound at frequencies greater than 10 kHz.

    <p>False</p> Signup and view all the answers

    Children can hear sounds at lower frequencies than older adults.

    <p>False</p> Signup and view all the answers

    Ultrasound is used for sonar purposes.

    <p>True</p> Signup and view all the answers

    The middle ear is responsible for the upper frequency limit of human hearing.

    <p>True</p> Signup and view all the answers

    Auditory sensation can occur if high-intensity ultrasound is fed directly into the human ear.

    <p>True</p> Signup and view all the answers

    Sonar is an acronym for sound navigation and detection.

    <p>False</p> Signup and view all the answers

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