Intro To Dms - Midterm Review - History Of Ultrasound
Questions and Answers
- 1.
The study of sound dates back to:
- A.
50 AD
- B.
400 BC
- C.
500 BC
- D.
400 AD
Correct Answer
C. 500 BCExplanation
The study of sound dates back to 500 BC. This is because ancient Greek philosopher Pythagoras is credited with being one of the first to study sound and its properties. He discovered that musical intervals could be expressed as ratios of whole numbers, laying the foundation for the mathematical understanding of sound. Pythagoras' work on sound and music greatly influenced subsequent thinkers and scientists, leading to further advancements in the field.Rate this question:
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- 2.
Who developed the sonometer?
- A.
Pythagoras
- B.
Galileo
- C.
Archytas of Tarentum
- D.
Leonardo Da Vinci
Correct Answer
A. PythagorasExplanation
Pythagoras is believed to have developed the sonometer. He was a Greek mathematician and philosopher who made significant contributions to the field of music. The sonometer, also known as a monochord, is an ancient musical instrument used to measure and study the properties of sound. Pythagoras is known for his work on the mathematical relationships between musical intervals, which laid the foundation for the understanding of harmonics and the development of music theory. Although there is limited historical evidence, Pythagoras is widely credited with the invention of the sonometer due to his extensive research and teachings on music.Rate this question:
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- 3.
Who determined that sound is produced by the motion of one object striking another?
- A.
Sir Francis Galton
- B.
Lord Rayleigh
- C.
Pythagoras
- D.
Archytas of Tarentum
Correct Answer
D. Archytas of TarentumExplanation
Archytas of Tarentum is credited with determining that sound is produced by the motion of one object striking another. He was an ancient Greek mathematician, philosopher, and scientist who lived around 400 BC. Archytas made significant contributions to various fields, including mathematics, physics, and music theory. His observation and study of vibrating strings led him to understand that sound is created when an object makes contact with another object, causing vibrations that propagate through the air as sound waves. His work laid the foundation for our understanding of the physics of sound production.Rate this question:
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- 4.
The meaning of this word is:Sound is carried to the ears by the movement of air.
Correct Answer
PropagationExplanation
Propagation refers to the transmission or spreading of something, such as sound or light, through a medium like air. In this context, the given sentence suggests that the movement of air is responsible for carrying sound to the ears. Therefore, "Propagation" is an appropriate term to describe this process.Rate this question:
- 5.
During what period in time was the study of sound dormant?
- A.
The Middle Ages
- B.
The Renaissance
- C.
WWII
- D.
19th Century
Correct Answer
A. The Middle AgesExplanation
During the Middle Ages, the study of sound was dormant. This period, also known as the medieval period, spanned from the 5th to the 15th century. During this time, scientific and intellectual pursuits were limited, and there was a lack of progress in various fields, including the study of sound. The focus of society was primarily on religion, and scientific exploration was not a priority. Therefore, the study of sound remained stagnant during this period.Rate this question:
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- 6.
During what period in time was the study of sound revived?
- A.
The Middle Ages
- B.
The Renaissance
- C.
20th Century
- D.
WWII
Correct Answer
B. The RenaissanceExplanation
During the Renaissance, there was a renewed interest in the study of various fields including art, science, and philosophy. This period, which occurred between the 14th and 17th centuries, marked a significant shift in intellectual and cultural development. It was during this time that scholars began to delve deeper into the understanding of sound, exploring concepts such as acoustics and musical harmony. The Renaissance saw advancements in musical instruments, composition techniques, and the study of sound waves, making it a pivotal period for the revival of the study of sound.Rate this question:
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- 7.
Who is believed to be the first person to realize that sound travels in waves?
- A.
Galileo
- B.
Leonardo Da Vinci
- C.
Augustin Fresnel
- D.
Sir Francis Galton
Correct Answer
B. Leonardo Da VinciExplanation
Leonardo Da Vinci is believed to be the first person to realize that sound travels in waves. His understanding of sound was based on his observations of water ripples and the similarity between water waves and sound waves. He recognized that sound waves are produced by vibrations and travel through a medium, just like waves in water. His insights laid the foundation for the study of acoustics and the understanding of how sound propagates.Rate this question:
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- 8.
Who demonstrated that the frequency of sound determines pitch?
- A.
Lord Rayleigh
- B.
Leonardo Da Vinci
- C.
Sir Francis Galton
- D.
Galileo
Correct Answer
D. GalileoExplanation
Galileo demonstrated that the frequency of sound determines pitch. He conducted experiments with pendulums and observed that the frequency of a pendulum's swing corresponds to the pitch of the sound produced. This discovery helped establish the foundation of the study of acoustics and the understanding of how sound works. Galileo's experiments and observations paved the way for further research in the field of sound and its relationship to frequency and pitch.Rate this question:
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- 9.
In 1877, The Theory of Sound was published by:
- A.
Lord Rayleigh
- B.
Augustin Fresnel
- C.
Douglas Howry
- D.
Carl Helmuth Hertz
Correct Answer
A. Lord RayleighExplanation
Lord Rayleigh is the correct answer because he was the author of the book "The Theory of Sound," which was published in 1877. This book is considered a landmark in the field of acoustics and covers various aspects of sound, including its propagation, reflection, and diffraction. Lord Rayleigh, also known as John William Strutt, was a British physicist and mathematician who made significant contributions to the understanding of sound and other areas of physics.Rate this question:
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- 10.
During the 19th century:Who invented the dog whistle?
- A.
Augustin Fresnel
- B.
Lord Rayleigh
- C.
Dr. William Fry
- D.
Sir Francis Galton
Correct Answer
D. Sir Francis GaltonExplanation
Sir Francis Galton is the correct answer because he is credited with inventing the dog whistle during the 19th century. A dog whistle is a type of whistle that emits a high-frequency sound that is inaudible to humans but can be heard by dogs. Galton, a scientist and polymath, developed the concept of the dog whistle as a tool for training and controlling dogs. His invention revolutionized the field of dog training and remains in use today.Rate this question:
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- 11.
Who proposed the Theory of Wave Diffraction?
- A.
Augustin Fresnel
- B.
Dr. William Fry
- C.
Sir Francis Galton
- D.
Christian Johann Doppler
Correct Answer
A. Augustin FresnelExplanation
Augustin Fresnel proposed the Theory of Wave Diffraction. This theory explains how waves, such as light or sound waves, bend and spread out as they encounter obstacles or pass through narrow openings. Fresnel's work on wave diffraction greatly contributed to our understanding of wave behavior and laid the foundation for many important applications in fields such as optics and acoustics. His theory revolutionized the understanding of wave phenomena and is still widely used in various scientific disciplines today.Rate this question:
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- 12.
What word describes the bending of waves around small obstacles and the spreading out of waves beyond small openings?
Correct Answer
DiffractionExplanation
Diffraction is the correct answer because it refers to the bending of waves around small obstacles and the spreading out of waves beyond small openings. When waves encounter an obstacle or a narrow opening, they diffract or change direction, causing them to bend around the edges of the obstacle or opening. This phenomenon is commonly observed with light waves passing through small slits or sound waves bending around corners. Diffraction is a fundamental property of waves and is crucial in understanding how they interact with their surroundings.Rate this question:
- 13.
What frequency of sound is "less than 20 Hz"?
Correct Answer
InfrasoundExplanation
Infrasound refers to sound waves with a frequency below the range of human hearing, which is typically less than 20 Hz. It is often produced by natural phenomena such as earthquakes or by man-made sources like machinery. Infrasound is not audible to humans but can still be felt as vibrations.Rate this question:
- 14.
What frequency of sound is between 20 Hz - 20,000 Hz?
Correct Answer
AudibleExplanation
The frequency of sound between 20 Hz - 20,000 Hz is considered audible. This means that it can be heard by the human ear. Frequencies below 20 Hz are infrasonic and cannot be heard, while frequencies above 20,000 Hz are ultrasonic and also cannot be heard by most humans. Therefore, the range of 20 Hz - 20,000 Hz is the audible range of sound.Rate this question:
- 15.
What frequency of sound is "greater than 20,000 Hz"?
Correct Answer
UltrasoundExplanation
Ultrasound refers to sound waves that have a frequency greater than 20,000 Hz. This means that the sound waves are vibrating at a higher rate than what is considered audible to the human ear. Ultrasound is commonly used in various medical applications, such as imaging and diagnostics, as well as in industrial and scientific fields. Due to its high frequency, ultrasound waves have unique properties that make them useful for specific purposes, such as their ability to penetrate tissues and produce detailed images.Rate this question:
- 16.
Which scientist theorized the Doppler effect, which proposed the effect of motion on a pitch of sound.
- A.
Jacques and Pierre Curie
- B.
Lord Rayleigh
- C.
Paul Langevin
- D.
Christian Johann Doppler
Correct Answer
D. Christian Johann DopplerExplanation
Christian Johann Doppler theorized the Doppler effect, which explains the change in pitch of sound due to the motion of the source or the observer. This effect is commonly observed in everyday life, such as when a car passes by and the pitch of its horn changes. Doppler's work laid the foundation for understanding the relationship between motion and sound, and his theory has been applied in various fields, including astronomy and medical imaging.Rate this question:
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- 17.
True or False:The Doppler effect is the change in frequency and wavelength of a wave as perceived by an observer moving relative to the source of the waves.
Correct Answer
TrueExplanation
The Doppler effect refers to the change in frequency and wavelength of a wave as perceived by an observer who is moving relative to the source of the waves. This phenomenon occurs because the motion of the observer causes the waves to either compress or stretch, resulting in a change in their frequency and wavelength. Therefore, the statement that the Doppler effect is the change in frequency and wavelength of a wave as perceived by an observer moving relative to the source of the waves is true.Rate this question:
- 18.
Who developed the phenomenon of piezoelectricity?
- A.
Christian Johann Doppler
- B.
Paul Langevin
- C.
Jacques and Pierre Curie
- D.
Karl Dussik
Correct Answer
C. Jacques and Pierre CurieExplanation
Jacques and Pierre Curie developed the phenomenon of piezoelectricity. Piezoelectricity refers to the ability of certain materials to generate an electric charge when subjected to mechanical stress, such as pressure or vibration. The Curie brothers conducted extensive research on the properties of crystals and discovered this phenomenon in 1880. Their work laid the foundation for the understanding and application of piezoelectric materials in various fields, including electronics, medical imaging, and energy harvesting.Rate this question:
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- 19.
Piezoelectricity means that ____________ would expand and contract slightly when exposed to electrical fields.
Correct Answer
CrystalsExplanation
Piezoelectricity refers to the phenomenon where crystals expand and contract slightly when exposed to electrical fields. This property is unique to certain types of crystals and is used in various applications, such as in sensors, actuators, and transducers. The electrical field causes a rearrangement of the crystal's internal structure, resulting in a change in its dimensions. This property is widely utilized in technology to convert electrical energy into mechanical energy and vice versa.Rate this question:
- 20.
During WWII, French scientist Paul Langevin discovered a way to use the property of echoing __________ ___________ to detect objects underwater, which was applied to sonar.
Correct Answer
sound wavesExplanation
During WWII, French scientist Paul Langevin discovered that sound waves have the property of echoing underwater. This discovery allowed him to develop a technique to detect objects underwater using sound waves, which was later applied to sonar technology. Sonar works by emitting sound waves into the water and then measuring the time it takes for the waves to bounce back after hitting an object. This information is used to determine the distance and location of the object. Therefore, the correct answer is "sound waves."Rate this question:
- 21.
Who experimented with animals producing lesions in the CNS of the animal which helped treat patients with Parkinson's Disease?
- A.
Dr. Karl Dussik
- B.
George Ludwig
- C.
Dr. William Fry
- D.
Jacques and Pierre Curie
Correct Answer
C. Dr. William FryExplanation
Dr. William Fry experimented with animals producing lesions in the CNS of the animal which helped treat patients with Parkinson's Disease.Rate this question:
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- 22.
Who was one of the first physicians to use ultrasound for diagnostic purposes using A-mode?
- A.
Dr. Karl Dussik
- B.
Dr. William Fry
- C.
Dr. Inge Edler
- D.
Dr. Douglas Howry
Correct Answer
A. Dr. Karl DussikExplanation
Dr. Karl Dussik was one of the first physicians to use ultrasound for diagnostic purposes using A-mode. His pioneering work in the 1940s involved using ultrasound to detect brain tumors. He developed the A-mode technique, which involved sending ultrasound waves into the body and measuring the time it took for the waves to bounce back. This allowed him to create a visual representation of the internal structures of the body. Dussik's work laid the foundation for the use of ultrasound in medical diagnostics, making him a key figure in the field.Rate this question:
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- 23.
Who demonstrated that when ultrasound was transmitted into the body, the ultrasound waves would be returned to the transducer?
- A.
Douglas Howry
- B.
John Wild
- C.
George Ludwig
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
All of the mentioned individuals, Douglas Howry, John Wild, and George Ludwig, demonstrated that when ultrasound was transmitted into the body, the ultrasound waves would be returned to the transducer.Rate this question:
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- 24.
Who implanted gallstones in the gallbladders of dogs to successfully detect them with ultrasound?
- A.
Douglas Howry
- B.
John Wild
- C.
George Ludwig
- D.
All of the above
Correct Answer
C. George LudwigExplanation
George Ludwig is the correct answer because he was the one who implanted gallstones in the gallbladders of dogs to successfully detect them with ultrasound. Douglas Howry and John Wild are not associated with this particular accomplishment. Therefore, the correct answer is George Ludwig.Rate this question:
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- 25.
Who developed the first ultrasound scanner which consisted of a laundry tub and later a cattle watering tank?
- A.
Douglas Howry
- B.
John Wild
- C.
George Ludwig
- D.
All of the above
Correct Answer
A. Douglas HowryExplanation
Douglas Howry is the correct answer because he is the one who developed the first ultrasound scanner using a laundry tub and later a cattle watering tank. This innovation paved the way for the development of modern ultrasound technology.Rate this question:
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- 26.
Who developed the contact scanner called a Diasonograph and is referred toas the Father of Obstetrical Ultrasound?
- A.
George Ludwig
- B.
Ian Donald
- C.
Joseph Holmes
- D.
Douglas Howry
Correct Answer
B. Ian DonaldExplanation
Ian Donald is referred to as the Father of Obstetrical Ultrasound because he developed the contact scanner called a Diasonograph. His pioneering work in the field of ultrasound imaging revolutionized obstetrics by allowing doctors to safely visualize and monitor the development of a fetus in the womb. His contributions have had a lasting impact on the field of obstetrics and ultrasound technology.Rate this question:
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- 27.
What two people worked together to use a flaw detector to demonstrate the motion of the heart--leading to the discovery of echocardiography?
- A.
Douglas Howry & Joseph Holmes
- B.
Carl Helmuth Hertz & Dr. Inge Edler
- C.
Douglas Howry & George Ludwig
- D.
Jacques & Pierre Curie
Correct Answer
B. Carl Helmuth Hertz & Dr. Inge EdlerExplanation
Carl Helmuth Hertz and Dr. Inge Edler worked together to use a flaw detector to demonstrate the motion of the heart, leading to the discovery of echocardiography.Rate this question:
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- 28.
In 1964, a vascular surgeon named Eugene Strandness began devoting his career to the study and development of imaging and Doppler assesment of peripheral ___________.
Correct Answer
vesselsExplanation
Eugene Strandness, a vascular surgeon, focused his career on studying and developing imaging and Doppler assessment techniques for peripheral vessels. This suggests that he dedicated his work to understanding and improving the imaging and evaluation of blood vessels located outside the heart and brain, such as those in the arms, legs, and other parts of the body.Rate this question:
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Mar 20, 2023Quiz Edited by
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Jul 24, 2010Quiz Created by
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