8L: Sound and hearing

sound waves occur when particles
1. vibrate
2. heat up
3. expand
4. move
ultrasound is
1. sounds too high-pitched for us to hear
2. sounds too low-pitched for us to hear
3. sounds too quiet for us to hear
4. none of these
sound travels
1. much slower than light
2. faster than light
3. at the same speed as light
4. slightly slower than light
Emily claps her hands, and hears the echo from a wall 2 seconds later. (Speed of sound = 330 m/s)
1. the wall is 330 metres away
2. the wall is 660 metres away
3. the wall is 165 metres away
4. the wall is 300 metres away
which is the correct sequence?
1. eardrum; hammer, anvil & stirrup bones; cochlea; auditory nerve
2. eardrum; cochlea; hammer, anvil & stirrup bones; auditory nerve
3. auditory nerve; cochlea; hammer, anvil & stirrup bones; eardrum
4. eardrum; auditory nerve; hammer, anvil & stirrup bones; auditory nerve
having two ears rather than one is an advantage, because
1. we can use time-of-arrival-difference to tell which direction sounds are coming from
2. we can tell which direction sound is coming from by which ear is loudest
3. we can hear quiet sounds more clearly
4. we can hear higher-pitched sounds
sound waves in air are
1. longitudinal
2. transverse
3. waveform
4. amplitude
we can see the shape of sound waves on a
1. Cathode Ray Oscilloscope
2. Frequency Meter
3. Decibel meter
4. VU meter
The usual range of human hearing is from
1. 20Hz to 18KHz
2. 10Hz to 13kHz
3. 30Hz to 25kHz
4. 50Hz to 25kHz
"frequency" means
1. how many waves per second
2. radio waves
3. how tall the waves are
4. how many waves per minute
frequency is measured in
1. Hertz
2. volts
3. seconds
4. decibels
which of these is true?
1. sound cannot travel through a vacuum
2. sound can travel through a vacuum
3. sound cannot travel through solids
4. sound travels faster through gases than through solids
where does sound travel fastest?
1. in solids
2. in liquids
3. in gases
4. the speed is the same in solids, liquids and gases
a loud sound has a
1. large amplitude
2. high frequency
3. low frequency
4. small amplitude
a high-pitched sound has a
1. high frequency
2. low frequency
3. large amplitude
4. small amplitude
loudness is measured in
1. decibels
2. volts
3. Hertz
4. VU
normal conversation is around
1. 50 decibels
2. 80 decibels
3. 90 decibels
4. 110 decibels
Ship's captains can use sound to find out how deep the water is. This is called
1. echo sounding
2. water sounding
3. sound depth
4. bottom sounding
ultrasound is used by
1. bats
2. elephants
3. cats
4. whales
the speed of sound in air is around
1. 330 m/s
2. 550m/s
3. 1,100 m/s
4. 1,500 m/s
where will you hear the most echoes?
1. an empty sports hall
2. a crowded sports hall
3. a bare living room
4. a furnished living room
a wave with a short wavelength has
1. a high frequency
2. a low frequency
3. a large amplitude
4. a small amplitude
a wave with a long wavelength has
1. a low frequency
2. a high frequency
3. a large amplitude
4. a small amplitude
a wave with a high frequency has
1. a short wavelength
2. a long wavelength
3. a low pitch
4. a small amplitude
which of these is false?
1. sound cannot travel through liquids
2. sound travels slower through gases than through solids
3. sound cannot travel without a medium
4. frequency is measured in Hertz
a microphone changes
1. sound energy into electrical energy
2. electrical energy into sound energy
3. sound energy into light energy
4. light energy into electrical energy
with a longitudinal wave
1. the vibration is in the same direction as the wave travels
2. the vibration is at right angles to the direction the wave travels
3. the vibration is small
4. the vibration has a low frequency
the three small bones in your middle ear are called
1. hammer, anvil, stirrup
2. hammer, anvil, bridle
3. bridle, stirrup, hammer
4. hammer, anvil, horseshoe
a sound travels 1,000m in 3 seconds. The speed of sound is
1. 330 m/s
2. 3,300 m/s
3. 33,000 m/s
4. 3 m/s
a tighter guitar string would vibrate at
1. a higher frequency
2. a lower frequency
3. the same frequency as a slack string
4. an infrasonic frequency