chap 11
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all blank is produced by something vibrating
sound
intensity
how much energy is flowing through a specific area for a specific amount of time.
what are sound waves?
sound waves are compressional waves
by increacing what of a medium the sound wave can travel faster
increasing the temp
Noise is known to come in what kind of pattern
noise comes in a random pattern
what are acoustics?
acoustic are the study of sound
how is pitch described as?
pitch is described as how high or low a sound seems to be
at what frequency is the most sensitive to humans?
440Hz and 7000Hz
what is an example of the Doppler effect ?
ambulance passing the car your in car
what is the Doppler effect definition?
Chang in pitch do to a moving source
what is the frequency for infrasonic waves
below 20Hz
what is the frequency for ultrasonic waves ?
above 20,000
This is the perception of sound intensity?
Loudness
Sound Quality
describing the difference of sound at the same pitch & frequency
what does the outer ear capture?
it captures the sound wave as it travels from the ear canal to the eardrum.
what does the middle ear do with the vibrations that are sent to the small bones in the ear?
the sound is being amplified
what does the Inner Ears tiny ear cells send to the brain
the cells transmit the nerve impulses to the brain
why is echolocation used
its used to locate objects
sonar is ?
sound waves used under water to locate objects
The decibel scale is used to measure what?
Sound intensity
at what decibel is considered the most harmful to humans
120dB
sound travels fastest through solids and slowest through gases
characteristic of sound waves
Name the three parts of the middle ear
Hammer,anvil,& stirrup
What are the visible parts of the outer ear
Ear canal and ear drum