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that he was able to hear his patient's heartbeat more clearly. Dr. René later experimented with different types
of materials until he finally decided upon a hollow tube of wood. He called this instrument "the cylinder"
due to its shape. Then, he changed its name into the "stethoscope" because from the Greek 'stethos' means
chest and 'skopein' means examining. In 1851, an Irish doctor named Arthur Leared invented a binaural
version of the stethoscope. A year later, George Cammann created a flexible, rubber stethoscope and it was
put into mass production. Throughout the 20th century, many minor improvements were made to the
stethoscope to reduce weight, improve acoustic quality, and filter out external noise. Electronic versions of
the stethoscope were also introduced to further amplify the sounds inside the body. During the Covid-19
pandemic, digital stethoscopes are seen as a major rise in popularity. A digital stethoscope is able to convert
an acoustic sound to electronic signals which can be transmitted to a personal computer, and doctors can
remotely listen to it.
2 nghe đầu tiên được tạo ra khi nào ?
16. When was the first stethoscope created?
A. In 1781
B. In 1816
C. In 1826
17. One drawback of immediate auscultation was that
A. doctors couldn't hear the heartbeat
B. female patients didn't approve this technique
C. it was hard to diagnose the patient's conditions
D. it could be uncomfortable for doctors while examining female patients
18. Which material was the first stethoscope made of? Chiec og nghe dau tional a lam bag
chất liệu giả
C. pin
D. rubber
B. wood
A. paper
D. In 1851
- 1 nhược điểm của nghe tim thai
ngay lập tức là
19. Which improvements in the stethoscope that took place in 1852? Catien've og nghe dien
ra vào năm 1852
A. Its name was changed.
B. It was turned into a binaural version.
C. It became lighter and had better sound.
D. It was produced in large quantities.
goaitru?
20. According to the passage, all of the following statements are true EXCEPT
A. Dr. René discovered the stethoscope while sending signals to his children.
B. Many improvements and changes were made to the stethoscope.
C. Electronic stethoscopes can increase the volume of internal sound.
D. Digital stethoscopes allow distance diagnosing.
DISSACE 3
the