SOUND IN MEDICINE I LEVEL Question 1. The Hertz (Hz) is the unit of measure for which wave property? A. Frequency B. Wavelength C. Amplitude D. Power E. Speed Question 2. The lower is the frequency, the _____________ is the sound. A. Lower B. Higher C. Quieter D. Louder E. Faster Question 3. The higher is the amplitude, the ______________is the sound. A. Louder B. Quieter C. Faster D. Lower E. Higher Question 4. Sound waves are longitudinal waves which cause in medium _____________ and rarefactions. A. Compressions B. Crests C. Troughs D. Pressure E. None of the above Question 5. The speed of sound in air in normal condition is about A. 340 m/s B. 1 00 m/s C. 30 m/s D. 1000 m/s E. 3 x 108 m/s Question 6. (Select two answers) The speed of any periodic wave is given by A. The wavelength times the frequency B. The wavelength divided by the period C. The wavelength times the period D. The wavelength divided by the frequency E. The wavelength times the speed Question 7. Match 1) the period of oscillation 2) amplitude of oscillations 3) frequency a) meters b) seconds c) degrees d) Hertz A.1b, 2a, 3d B.1b, 2c, 3d C.1b, 2a, 3c D.1c, 2a, 3c E.1b, 2d, 3c Question 8. The normal frequency range of hearing for a young person is about A. 20 Hz to 20 kHz B. 10 Hz to 10 kHz C. 30 Hz to 30 kHz D. 100 Hz to 10,000 Hz E. 300 Hz to 30,000 Hz Question 9. The quality of being high or low is a sound's ________________ A. Pitch B. Loudness C. Amplitude D. Frequency E. Intensity Question 10. A sound's pitch is based on the _____________ of its sound waves A. Frequency B. Loudness C. Amplitude D. Pitch E. Intensity Question 11. What is the first step in the hearing process? A. The outside part of the ear catches the sound waves through the air B. Vibrations from the eardrum are passed to small bones C. The moving liquid bends tiny hairs in your inner ear D. The sound waves move down the auditory canal E. The inner ear catches vibrations Question 12. What is the final step in the hearing process? A. The auditory nerves turn the movements of the tiny hairs into signals and send them to the brain B. Vibrations from the eardrum are passed to small bones C. The moving liquid bends tiny hairs in sound waves make the eardrum vibrate D. The outside part of the ear catches the sound waves through the air E. The moving liquid bends tiny hairs in your inner ear Question 13. Which formula describes relationship between intensity of sound and sound pressure? I A. I B. C. I 2 p max 2 p max 2 p max 2 I 1 2 D. I E. p max (2 ) 2 Question 14. The velocity of the sound in liquids is A. Bigger than in the air B. Lower than in the air C. Equal as in the air D. Bigger than in solid materials E. Equal as in solid materials Question 15. Infrasound is a mechanical wave with a frequency A. Under 20 Hz B. Above 20 Hz C. From 20 Hz to 20 kHz D. Above 20 kHz E. From 20 Hz to 16 kHz Question 16. The speed of sound in air with a degree increase of temperature A. Increases B. Decreases C. Doesn´t change D. Increases with temperatures lower than 0 ºC E. Decreases with temperatures lower than 0 ºC Question 17. A sound wave is produced when an object A. Vibrates B. Accelerates C. Decelerates D. Remains stationary E. Heated Question 18. The wavelength of a wave is measured in A. Meters B. Phone C. Hertz D. Seconds E. Decibels Question 19. Another name for the unit hertz is A. Cycles per second B. Seconds per cycle C. Meters per second D. Decibels per second E. Decibels Question 20. Sound travels fastest in A. A metal B. A vacuum C. The sea D. The atmosphere E. A wood Question 21. The testing of a person’s ability to hear various sound frequencies calls A. Audiometry B. Auscultation C. Percussion D. Resonant E. Dull Question 22. The technical term for listening to the internal sounds of the body calls A. Auscultation B. Audiometry C. Percussion D. Resonant E. Dull Question 23. A method of tapping on a surface to determine the underlying structure calls A. Percussion B. Auscultation C. Audiometry D. Resonant E. Dull Question 24. Which formula describes Weber-Fechner’s law? A. 𝐸 = 10 𝑘𝑙𝑜𝑔 B. 𝐸 = 10 𝑘𝑙𝑜𝑔 C. 𝐸 = 10 𝑙𝑜𝑔 D. 𝐸 = 𝑘𝑙𝑜𝑔 𝐼 𝐼0 E. 𝐸 = 10 𝑙𝑜𝑔 I 𝐼 𝐼0 𝐼0 𝐼 𝐼0 𝐼0 𝐼 Question 25. The figure shows the structure of the ear. Number 1 corresponds to A. Middle ear B. Inner ear C. Cochlear nerve D. Cochlea E. Outer ear Question 26. The figure shows the structure of the ear. Number 2 corresponds to A. Inner ear B. Middle ear C. Cochlear nerve D. Cochlea E. Outer ear Question 27. The figure shows the structure of the ear. Number 3 corresponds to A. Cochlear nerve B. Inner ear C. Middle ear D. Cochlea E. Outer ear Question 28. The figure shows the structure of the ear. Number 4 corresponds to A. Cochlea B. Cochlear nerve C. Inner ear D. Middle ear E. Outer ear Question 29. The figure shows the structure of the ear. Number 5 corresponds to A. Outer ear B. Cochlea C. Cochlear nerve D. Inner ear E. Middle ear Question 30. What an object produce a sound? A. Vibrate B. Medium C. Voice D. Tongue E. Air Question 31. During a thunderstorm, you hear the thunder before you see the lightning. A. False B. True Question 32. Threshold of hearing is: A. the weakest sound that can catch a human ear at a frequency of 1000 Hz B. the sound that can catch a human ear at a frequency 1Hz C. the loudest sound that can catch a human ear at a frequency of 10 kHz D. sound that can catch a human ear at a frequency 100 Hz E. complex sound that can catch the human ear at a frequency 10 Hz Question 33. The lower limit of sensitivity of the human ear (threshold of hearing) at a frequency of 1000 Hz correspond to sound intensity A. 10-12 W / m2 B. 10-5 W / m2 C. 10-3 W / m2 D. 10-1 W / m2 E. 10 W / m2. Question 34. Bell (= 10decibell) is a change in the intensity of a simple sound (tone) into A. 10 times B. e = 2.72 times C. 3 times D. 2 times E. 24 = 16 times. Question 35. During propagation of a spherical sound wave in the medium, its intensity A. is inversely proportional to R2 B. is inversely proportional to R C. exponentially with R D. exponentially with (- R) E. exponentially with (- R2)). Question 36. In conditions of average intensity of sound stimulation the ratio A. is a constant B. depends on the frequency of oscillations C. depends on the phase of oscillation D. depends on the period of fluctuations I : I E. is not a constant value. Question 37. According to Weber-Fechner's law, if the irritation increases in a geometric progression, then the auditory perception: A. increases in arithmetic progression B. decreases in arithmetic progression C. increases in geometric progression D. Comes in geometric progression E. is a constant value. Question 38. The complex tone is: A. periodic non-harmonic oscillation B. periodic harmonic oscillation C. non-periodic non-harmonic oscillations D. Periodic oscillations with a frequency ω E. harmonic oscillation with a frequency of 2ω. Question 39. Noise is: A. nonperiodic nonharmonic oscillations B. periodic harmonic oscillation C. harmonic oscillation of different amplitudes D. harmonic oscillations of a certain amplitude E. harmonic oscillation of high intensity. Question 40. The curve of equal loudness expresses the dependence: A. the intensity of the sound vs. the frequency; B. The level of sound from vs. the amplitude of sound C. period of sound vibrations vs. frequency; D. intensity of sound vs. sound pressure E. intensity of sound vs. time Question 41. The timbre of the sound is determined by: A. acoustic spectrum B. loudness; C. amplitude of oscillations D. sound pressure E. intensity of the sound wave Question 42. What sounds are characterized by a continuous spectrum? A. noises B. complex tones C. simple tones D. acoustic shock E. all sounds Question 43. Loudness of sound depends on A. frequency of oscillation and intensity of sound; B. only the oscillation frequency; C. only the intensity of the sound; D. amplitude of oscillation and intensity of sound; E. only amplitude of oscillations Question 44. Enumerate types of sound A. tones, noises, acoustic shock B. acoustic shock, pitch, tones C. noise, loudness, tones D. acoustic shock, acoustic spectrum, tones E. loudness, noises Question 45. Simple tone is A. harmonically oscillations B. a combination of frequencies C. a short-time non-periodic action of the source of sound D. periodical non-harmonically oscillations E. non-periodical oscillations II LEVEL Question 1. Sound is A. A wave which travels through many materials but not a vacuum B.A wave which travels through any material or a vacuum C. A wave which travels only through air D. Particles which travel through most things E. Particles which travel through most things and vacuum Question 2. Through which of the following materials can sound travel? A. All the materials B. Ice C. Diamond D. Wood E. Hydrogen Question 3. If the frequency of the wave is lowered, what happens to the speed of the sound wave? A. Sound wave speed does not change B. Sound wave speeds up C. Sound wave slows down D. Sound wave speeds pulse E. All of the above Question 4. Sound waves in gases are what type of wave? A. A longitudinal wave B. A transverse wave C. A surface wave D. A tidal wave E. A perpendicular wave Question 5. Sound does not travel in space because A. No air, so there is no medium to travel through. B. Too many asteroids C. Too dark D. Sound is absorbed E. What? Question 6. Another term for a sound reflection off of a wall or other object through which a sound wave cannot pass is A. Echo B. Reverb C. Vibration D. Amplitude E. Absorption Question 7. Assume that waves are propagating in a uniform medium. If the frequency of the wave source doubles then A. The wavelength of the wave’s halves. B. The wavelength of the wave’s doubles. C. The speed of the wave’s halves. D. The speed of the waves doubles. E. The wavelength and the speed of the waves halves Question 8. A sound wave is different than a light wave in that a sound wave is A. Not capable of traveling through a vacuum B. Produced by an oscillating object and a light wave is not C. Not capable of diffracting and a light wave is D. Capable of existing with a variety of frequencies and a light wave has a single frequency E. Capable to polarized like a light wave is Question 9. If the sound power intensity in the room doubles we will A. Notice only a small difference B. Hear a big difference in the loudness C. Not hear any difference at all D. Be deafened E. Hear a difference exactly doubles in the loudness Question 10. Brain interprets vibrations and electrical signals as A. Sounds B. Actions C. Reactions D. Movements E. Noises Question 11. An echo occurs when a sound wave is A. Reflected B. Absorbed C. Transmitted D. Refracted E. Passed Question 12. Subjective characteristics of acoustical sensation are: A. Quality or timbre, pitch, loudness B. Harmonic spectrum, intensity of sound wave, loudness, quality or timbre C. Frequency, intensity of sound wave, pressure of sound wave D. Pitch, intensity of sound, pressure of sound wave E. Quality or timbre, harmonic spectrum, intensity of sound, pressure of sound Question 13. Objective characteristics of sound are: A. Frequency, harmonic spectrum, intensity of sound, pressure of sound B. Frequency, harmonic spectrum, intensity of sound wave, loudness, pressure of sound wave C. Frequency, harmonic spectrum, loudness, pressure of sound wave D. Frequency, pitch, intensity of sound, pressure of sound wave E. Frequency, quality or timbre, pitch, loudness Question 14. Doubling the frequency of a sound source doubles the speed of the sound waves which it produces. A. False B. True Question 15. If two crests meet while passing through the same medium, then constructive interference occurs. A. True B. False Question 16. It is possible that one vibrating object can set another object into vibration if the natural frequencies of the two objects are the same. A. True B. False Question 17. The speed of sound in a solid material depends not on the material’s density, but on its elasticity. A. True B. False Question 18. Sound intensity is a physiological sensation, but loudness can be measured by instruments. A. False B. True Question 19. The cells of the receptor organ in the inner ear do not regenerate. A. True B. False Question 20. Constructive sound interference is a useful property in antinoises technology. A. False B. True Question 21. If the speed of a wave is 340 m/s and its frequency is 1700 Hz, then λ for this wave in cm will be A. 20 B. 200 C. 0.2 D. 0.02 E. 2 Question 22. A sound wave traveling at 350 m/s has a frequency of 500 Hz. What is its wavelength? A. 0.7 m B. 0.2 m C. 0.8 m D. 1 m E. 0.3 m Question 23. The figure above shows a transverse wave traveling to the right at a particular instant of time. The period of the wave is 0.2 s. What is the amplitude of the wave? A. 4 cm B. 5 cm C. 8 cm D. 10 cm E. 2 cm Question 24. The figure above shows a transverse wave traveling to the right at a particular instant of time. The period of the wave is 0.2 s. What is the speed of the wave? A. 50 cm/s B. 4 cm/s C. 25 cm/s D. 200 cm/s E. 100 cm/s Question 25. How fast would you expect a 1.27 m sound wave with a frequency of 260 Hz to move? A. 330 m/s B. 33 m/s C. 204 m/s D. 210 m/s E. 0.0049 m/s Question 26. The average human ear is most sensitive to 2,500.0 Hz sounds. Assuming sound to move at 334 m/s, what is the wavelength of sounds people are most sensitive? A. 13.4 cm B. 56 cm C. 7.5 cm D. 835 cm E. 0.7485 m Question 27. What is the frequency of water waves if a new crest is observed to move by a bridge every 2 seconds? A. 0.5 Hz B. 1 Hz C. 2 Hz D. 1/15 Hz E. 5 Hz Question 28. A vibrating object with a frequency of 200 Hz produces sound which travels through air at 360 m/s. The number of meters separating the adjacent compressions in the sound wave is A. 1.8 B. 3.6 C. 7.2 D. 200 E. 180 Question 29. The acoustic impedance (resistance) of the medium depends on: 1. the density of the medium ρ; 2. the speed of sound propagation v; 3. the frequency of sound ν; 4.the intensity of sound I; 5. the amplitude of sound vibrations; A. 1,2 B. 3.5 C. 4.5 D. 1.4.5 E. 1.5 Question 30. The noise level is 130 dB. What is the intensity of sound in W/m2? A. 10 B. 100 C. 1000 D. 0.1 E. 0.01 III LEVEL Question 1. How loud are noises in space? A. There are no sounds in space B. Never been there, I wouldn't know C. Really loud, nothing out there to stop the sound waves D. Very quiet with a few noises, almost like walking in the forest E. Sound spreads in space the same as on earth Question 2. If the frequency of sound wave is doubled, the wavelength: A. Halves and the speed remain unchanged. B. Doubles and the speed remain unchanged. C. Halves and the speed halves. D. Doubles and the speed doubles. E. Not affect on wavelength Question 3. As sound travels from steel into air, both its speed and its: A. Wavelength decrease B. Wavelength increase C. Frequency decrease D. Frequency increase E. Frequency remain unchanged Question 4. Sound volume is determined by A. sound pressure, ear sensitivity, health of the ear B. Harmonic spectrum C. Wavelength D. frequency E. temperature Question 5. A sound wave of wavelength λ and frequency f is propagated through a gold rod, then exits into the surrounding air. What most accurately describes the relationship between the original wavelength and frequency with the new wavelength λ' and new frequency f' in air? A. λ > λ', f = f' B. λ = λ', f < f' C. λ < λ', f = f' D. λ = λ', f > f' E. λ = f, λ' = f' Question 6. A sound wave is a pressure wave; regions of high (compressions) and low pressure (rarefactions) are established as the result of the vibrations of the sound source. These compressions and rarefactions result because sound A. Vibrates longitudinally; the longitudinal movement of air produces pressure fluctuations B. Is more dense than air and thus has more inertia, causing the bunching up of sound C. Waves have a speed that is dependent only upon the properties of the medium D. is like all waves; it is able to bend into the regions of space behind obstacles E. Is able to reflect off fixed ends and interfere with incident waves Question 7. A pitch of sound can be change by changing A. Frequency B. String C. Instrument D. Temperature E. Tension Question 8. A saxophone is playing a steady note of frequency 266 Hz. The temperature in the room is 25 C. Suppose that at some instant the varying pressure at your eardrum is at a maximum. How far away in meters is the next pressure maximum? A. 1.3 m B. 2.5 m C. 0.8 m D. 3.1 m E. 4 m Question 9. This effect is known as "the Stevens's rule". A. A high pitch (>2kHz) will be perceived to be getting higher if its intensity is increased, whereas a low pitch (<2kHz) will be perceived to be going lower with increased intensity. B. A high pitch (>20kHz) will be perceived to be getting higher if its intensity is increased, whereas a low pitch (<20kHz) will be perceived to be going lower with increased intensity. C. A high pitch (>2kHz) will be perceived to be getting lower if its intensity is increased, whereas a low pitch (<2kHz) will be perceived to be going higher with increased intensity. D. A high pitch (>20kHz) will be perceived to be getting lower if its intensity is increased, whereas a low pitch (<20kHz) will be perceived to be going higher with increased intensity. E. A high pitch (<2kHz) will be perceived to be getting higher if its intensity is increased, whereas a low pitch (>2kHz) will be perceived to be going lower with increased intensity. Question 10. Audiogram is A. a tracker sound intensity in dB (threshold of perception) the frequency of the sound that is characteristic spectral ears at the threshold of audibility. B. the listening of sounds made by internal organs for medical diagnosis, usually using a stethoscope. C. a graphic tone registration and heart murmurs and its diagnostic interpretation D. a method of tapping on a surface to determine the underlying structure, and is used in clinical examinations to assess the condition of the thorax or abdomen. E. a treatment using infrasonic shock waves.