40 Questions
What is the medical use of sound waves in breaking kidney stones?
To shatter the stones and avoid surgery
What is the principle behind the Doppler Effect?
The compression of sound waves between the moving object and the observer
What is the actual change in the sound wave during the Doppler Effect?
No change in frequency
What is the purpose of using Doppler sound waves in the National Weather Service?
To measure weather conditions
What is the relationship between the distance and the sound wave during the Doppler Effect?
The distance decreases as the sound wave approaches
What is lightning?
A type of light wave
What is sound in medicine?
A vibration that propagates through a medium
What type of wave can sound propagate as in solids?
Transverse wave
What is the role of the sound source in sound propagation?
It creates vibrations in the surrounding medium
What happens to the particles of the medium as the sound wave propagates?
They vibrate in place
What three factors affect the behavior of sound propagation?
Medium, distance, and time
What happens to the pressure, velocity, and displacement of the medium at a fixed distance from the source?
They vary in time
What are the two fundamental elements of sound?
Pressure and time
What is the horizontal axis representing in Figure 2?
Time
What is a complex sound wave typically separated into?
Component sound wave frequencies
What is a common way to simplify sound waves?
Describe them in terms of sinusoidal plane waves
What is the purpose of breaking down a complex sound wave into its component parts?
To understand the sound more fully
What is the typical graphical representation of a sound wave?
Pressure over time graph
What is the main difference between ultrasound and audible sound?
Humans cannot hear ultrasound
What is the approximate frequency limit of human hearing in healthy young adults?
20 kilohertz
What is the definition of ultrasound according to the American National Standards Institute?
Sound at frequencies greater than 20 kHz
What is the main reason for the upper frequency limit of human hearing?
Limitations of the middle ear
What is the original meaning of the acronym Sonar?
Sound Navigation and Ranging
What is a common use of ultrasound in underwater range finding?
Sonar
What is the function of the outer ear?
To collect sound and direct it into the ear
What is the tympanic membrane also known as?
Eardrum outer layer
What is the function of the Eustachian tube?
To drain fluid from the middle ear into the throat
What is the cochlea responsible for?
Transforming sound into nerve impulses
What is the main function of the semicircular canals?
To send information on balance and head position
How many parts does the ear consist of?
Three
Ultrasound has different physical properties than audible sound.
False
The upper frequency limit of human hearing is 20 hertz.
False
Ultrasound devices can operate at frequencies as low as 10 kHz.
False
Ultrasound is used only in the medical field.
False
The American National Standards Institute defines ultrasound as sound at frequencies greater than 10 kHz.
False
Children can hear sounds at lower frequencies than older adults.
False
Ultrasound is used for sonar purposes.
True
The middle ear is responsible for the upper frequency limit of human hearing.
True
Auditory sensation can occur if high-intensity ultrasound is fed directly into the human ear.
True
Sonar is an acronym for sound navigation and detection.
False
Explore the concept of sound in medicine, including its definition, propagation, and perception by the brain. Learn about the physics of sound waves and how they interact with different mediums. Test your understanding of sound in medical contexts.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
