The range in frequencies of musical
sounds is approximately 20- 20,000 cycles per second (cy/sec), Some people can
hear higher frequencies than others. Longitudinal waves whose frequencies are
higher than those within the audible range are called ultrasonic frequencies.
Ultrasonic frequencies are used in sonar for such purposes as submarine
detection and depth finding. Ultrasonic frequencies are also being tried for
sterilizing food since these frequencies kill some bacteria. Sound waves of all
frequencies in the audible range travel at the same speed in the same medium. In
the audible range, the higher the frequency of the sound the higher is the
pitch. The term supersonic refers to speed greater than sound. An airplane
traveling at supersonic speed is moving at a speed greater than the speed of
sound in air at that temperature. Mach
A. 200 cy/sec
B. 5,000 cy/sec
C. 10,000 cy/sec
D. 20,000 cy/sec
更多"Passage 3
The range in fr"的相关试题:
[单项选择] Passage 3
The range in frequencies of musical
sounds is approximately 20- 20,000 cycles per second (cy/sec), Some people can
hear higher frequencies than others. Longitudinal waves whose frequencies are
higher than those within the audible range are called ultrasonic frequencies.
Ultrasonic frequencies are used in sonar for such purposes as submarine
detection and depth finding. Ultrasonic frequencies are also being tried for
sterilizing food since these frequencies kill some bacteria. Sound waves of all
frequencies in the audible range travel at the same speed in the same medium. In
the audible range, the higher the frequency of the sound the higher is the
pitch. The term supersonic refers to speed greater than sound. An airplane
traveling at supersonic speed is moving at a speed greater than the speed of
sound in air at that temperature. Mach
A. fundamental
B. amplitude
C. frequency
D. overtones
[单项选择]
Passage One
Chinese Buddhist Music Catches Audience in HK
中华佛教音乐吸引香港听众
The Hong Kong Cultural Center in Victoria Bay was packed on Thursday night, and loud applause periodically echoed through the neon lit sky. It was not rock music nor was it pop—it was traditional Chinese Buddhist music that made an instant hit in the modern metropolis.
Hong Kong is the fourth leg of the Buddhist music performance tour by a troupe consisting of more than 130 monks from the Chinese mainland and Taiwan. And this is also the first time monks from across the Taiwan Strait had jointly set up a troupe to perform, on global stages.
Crowds of Hong King residents were lining up at the local port waiting to welcome members of the troupe who were sailing in from Macao, where they h
A. a long history of Chinese Buddhism
B. many different temples across China
C. the three branches of Buddhism in China
[单项选择] Passage Three
The history of Western music
properly begins with the music of the Christian, Church. But all through the
Middle Ages and even to the present time men have continually turned back to
Greece and Rome for instruction, for correction, and for inspiration in their
several fields of work; this has been true in music--though with some important
differences. R6man literature, for example, never ceased to exert influence in
the Middle Ages, and this influence became much greater in the fourteenth and
fifteenth centuries when more Roman works became known, at the same time, too,
the surviving literature of Greece was gradually recovered. But in
literature, as well as in some other fields (notably sculpture), medieval or
Renaissance artists had the advantage of being able to study and, if they so
desired, imitate the models of antiquity. T
A. Roman and Greek works were better than the those of medieval Christian church
B. Roman and Greek works were different from Medieval works
C. the Roman and Greek music became known
D. a lot of Roman and Greek works were discovered
[单项选择]
The range in frequencies of musical
sounds is approximately 20-20,000 cycles per second (cy/sec). Some people can
hear higher frequencies khan others. Longitudinal waves whose frequencies are
higher than those within the audible range are called ultrasonic frequencies.
Ultrasonic frequencies are used in sonar for such purposes as submarine
detection and depth finding. Ultrasonic frequencies are also being tried for
sterilizing food since these frequencies kill some bacteria. Sound waves of all
frequencies in the audible range travel at the same speed in the same medium. In
the audible range, the higher the frequency of the sound the higher is the
pitch. The term supersonic refers to speed greater than sound. An airplane
traveling at supersonic speed is moving at a speed greater than the speed of
sound in air at that temperature. Mach 1 means a speed equal to
A. 200 cy/see
B. 5,000 cy/sec
C. 10,000 cy/sec
D. 20,000 cy/sec
[单项选择]The range in frequencies of musical sounds is approximately 20-20,000 cycles per second (cy/sec). Some people can hear higher frequencies khan others. Longitudinal waves whose frequencies are higher than those within the audible range are called ultrasonic frequencies. Ultrasonic frequencies are used in sonar for such purposes as submarine detection and depth finding. Ultrasonic frequencies are also being tried for sterilizing food since these frequencies kill some bacteria. Sound waves of all frequencies in the audible range travel at the same speed in the same medium. In the audible range, the higher the frequency of the sound the higher is the pitch. The term supersonic refers to speed greater than sound. An airplane traveling at supersonic speed is moving at a speed greater than the speed of sound in air at that temperature. Mach 1 means a speed equal to that of sound. Mach 2 means a speed equal to twice that of sound, etc.
Musical sounds have three basic characteristics: pitc
A. fundamental
B. amplitude
C. frequency
D. overtones
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