Oscilloscope
Sound Production
Frequency
Human Ear
Sound Levels
100
The pitch of the sound is represented by what quantity?
Frequency
100
What are sounds made by?
Vibrations
100
The units of frequency are:
Hertz
100
The outer ear channels what into the ear?
Sound waves
100
What is the device used to measure sound called?
Sound meter
200
The height of the wave is called?
Amplitude
200
A long string produces what pitch of sound?
Low
200
Frequency is the number of waves per: - minute - meter - second
second
200
What is the thin membrane inside your ear called?
ear drum
200
What are the units of sound levels
Decibels
300
The amplitude tells us about what feature of a sound?
Volume or loudness
300
A small object produces what pitch of sound?
High
300
The range of human hearing is
20 - 20,000 Hz
300
What type of signals does the ear auditory nerve send to the brain?
Electrical
300
What is the minimum level of sound that can be heard?
0 dB
400
Lots of closely packed waves would represent a: - high frequency - low frequency
high frequency
400
To increase the pitch of an object you can....
decrease the size
400
Five hundred vibrations per second would have a frequency of...
500Hz
400
The cochlea is filled with what?
Fluid
400
Above what sound level is damaging to your ears?
85 dB
500
Reducing the pitch of a sound does what to the shape of the wave?
Decreases frequency so waves become more spread out
500
A high pitched sound is created by: - lots of fast vibrations - few slow vibrations
Lots of fast vibrations
500
What happens to the range of human hearing as you age?
It decreases
500
What are the three bones inside the inner ear called?
Hammer, Stirrup, and Anvil
500
How loud is a rock concert typically?
110-130 dB
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