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AP Psychology 3.3 Sensation and Perception 9 Views
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AP Psychology 3.3 Sensation and Perception. What is the height of a sound wave called?
Transcript
- 00:04
Here's your shmoop du jour brought to you by sound waves the [Sound waves appear]
- 00:07
gesture you see when a song greets you today's question is the height of a
- 00:11
sound wave is known as the what and here are your potential answers okay well here we
- 00:16
go..... well we'll do you a favor and eliminate
- 00:19
the obviously wrong one first seeing as cochlea is the nail shaped portion of the
Full Transcript
- 00:24
inner ear there's no way it has anything at all to do with the technical measure
- 00:28
of a sound wave one down four to go and remember slow and steady wins the race [A slug slowly moves]
- 00:31
here.......Could it be D energy, well sound energy density is calculated by this
- 00:39
mathematical calculation where p is the sound pressure, v is the particle
- 00:44
velocity, c is the speed of sound and well it's a lot more complicated than [Man rolls his eyes]
- 00:49
just the height of a sound wave so we can lose D now what about E; volume
- 00:53
well volume isn't even a scientific term our purposes that option might as well
- 00:58
not even exist so cross out E. That leaves us with amplitude and frequency
- 01:02
well the frequency of the sound wave refers to the number of cycles per
- 01:06
minute the vibration has aka the number of times this wave here goes up and down [Wave turns green]
- 01:12
this is most often measured in Hertz and ultimately determines the pitch of the [Soundwave appears beside a girls ear]
- 01:17
sound that we hear, the deafening squeals of a small child would have a much
- 01:22
higher frequency than the smooth baritone of Elvis Presley not that we're [Elvis singing on stage and a crying baby appears]
- 01:27
discriminating against any certain frequencies but well you know
- 01:30
you're all special in your own way while this measures the frequency of those ups
- 01:34
and downs it doesn't measure the height which is what we're looking for so B
- 01:37
ain't nothing but a hound dog the height of the wave is referred to as amplitude
- 01:42
the taller the wave, the louder the sound so in the case of our baby and the king [A baby in a crib and Elvis holding a guitar]
- 01:47
here you can clearly see which one is louder and which one you're giving back
- 01:52
to its mommy so A is the correct choice A is in anyone got earplugs [Man with Elvis's face inserts ear plugs]
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