The function of the eardrum in the middle ear is to A. carry the sound energy to

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The function of the eardrum in the middle ear is to A. carry the sound energy to the brain. B. collect the sound waves. C. vibrate with the frequency of the received sound. D. amplify the received sound. 2. The multiple reflection of a single sound wave is a/an A. echo. B. diffraction. C. reverberation. D. refraction. 3. In a stringed musical instrument, the part that vibrates in resonance with the sound waves produced by the strings is called the A. reed. B. diatonic scale. C. sounding board. D. membrane. 4. Rarefaction occurs only in a _______ wave. A. sympathetic. B. transverse. C. longitudinal. D. forced. 5. The _______ of a sound wave is defined as the amount of energy passing through a unit area of the wave front in a unit of time. A. compression B. intensity C. amplitude D. frequency 6. If two waves with equal amplitudes and wavelengths travel through a medium in such a way that a particular particle of the medium is at the crest of one wave and at the trough of the other wave at the same time, what will happen to that particle? A. The particle will cause beats as a result of the wave combination. B. The particle will move halfway to the crest due to reinforcement. C. The particle will vibrate with double amplitude due to resonance. D. The particle will remain stationary due to interference. 7. When the temperature of the air is 25°C, the velocity of a sound wave traveling through the air is approximately A. 320 m/s. B. 332 m/s. C. 347 m/s. D. 357 m/s. 8. If a source of sound waves is rapidly approaching a person, the sound heard by the person appears to have A. a frequency higher than the original frequency. B. a pitch lower than the original pitch. C. an amplitude lower than the original amplitude. D. a period higher than the original period. 9. If a person is in front of a smooth surface from which a sound is reflected, the person would hear a sound that A. seems to lack overtones. B. seems to come from behind the surface. C. has a higher intensity than the sound produced by the source. D. has a higher pitch than the sound produced by the source. 10. In a transverse wave that travels through a medium, the molecules of the medium vibrate A. at right angles to the direction in which the wave travels. B. with smaller amplitudes than the molecules in a longitudinal wave. C. at twice the velocity of the molecules in a longitudinal wave. D. in the direction in which the wave travels. 11. A sound that's produced by a single wave at a constant frequency and with no overtones is called A. a discordant sound. B. an average sound. C. a mellow sound. D. a pure sound. 12. If a string vibrates at the fundamental frequency of 528 Hz and also produces an overtone with a frequency of 1,056 Hz, this overtone is the A. first harmonic. B. second harmonic. C. fourth harmonic. D. third harmonic. 13. In a stringed musical instrument, the sound frequency of a particular string can be increased by A. lengthening the string. B. loosening the string. C. tightening the string. D. increasing the string's thickness. 14. When a sound from a source is refracted away from the surface of the earth, it gives an indication that the A. wind is blowing in the direction of the sound. B. air has high humidity. C. ground is cooling faster than the air. D. air is cooler than the ground. 15. Which one of the following frequencies of a wave in the air can be heard as an audible sound by the human ear? A. 1,000 Hz B. 100,000 Hz C. 0.10 Hz D. 10 Hz 16. During the process of steel production, the flaws in steel casting are detected by A. ultrasonic vibrations. B. longitudinal vibrations. C. infrasonic vibrations. D. resonant vibrations. 17. Which of the following phenomena is taking place when sound waves are reflected from a surface along parallel lines? A. Refracting B. Focusing C. Absorption D. Diffusion 18. The spreading of sound waves around openings in barriers is called A. refraction. B. an echo. C. reverberation. D. diffraction. 19. The wavelength of a wave is the distance between A. two consecutive crests. B. the rarefaction and the following compression. C. the crest and the following trough. D. the amplitude and the normal position. 20. The maximum distance a molecule has been moved from its normal position by a wave is A. frequency. B. rarefaction. C. amplitude. D. compression. 21. A surface receiving sound is moved from its original position to a position three times farther away from the source of the sound. The intensity of the received sound thus becomes A. nine times as low. B. nine times as high. C. three times as high. D. three times as low. 22. In which one of the following locations can a person hear the echo of a sound? A. Less than 33.2 meters behind the reflecting surface B. Less than 16.6 meters in front of the reflecting surface C. At least 16.6 meters in front of the reflecting surface D. At least 33.2 meters behind the reflecting surface 23. A wave with a period of 0.008 second has a frequency of A. 80 Hz. B. 12.5 Hz. C. 800 Hz. D. 125 Hz. 24. If a wave hits a smooth surface at an angle of incidence of 40 degrees, the angle of reflection is A. 90 degrees. B. 80 degrees. C. 0 degrees. D. 40 degrees. 25. The part of the ear where sound wave compressions and rarefactions cause the eardrum to vibrate is the A. outer ear. B. auditory nerve. C. inner ear. End of exam D. middle ear.

Explanation / Answer

only 4 subparts at a time pelase

The function of the eardrum in the middle ear is to
C. vibrate with the frequency of the received sound.

2. The multiple reflection of a single sound wave is a/an
A. echo.

3. In a stringed musical instrument, the part that vibrates in resonance with the sound waves produced by the strings is called the
C. sounding board.

4. Rarefaction occurs only in a _______ wave.
C. longitudinal

5. The _______ of a sound wave is defined as the amount of energy passing through a unit area of the wave front in a unit of time.
B. intensity

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