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36 terms

Sound

STUDY
PLAY
sound
is a disturbance that travels through a medium as a longitudinal wave
Sound Waves
reflect off objects, diffract through narrow openings and around barriers, and interfere each other
echo
sound waves may reflect when they hit a surface
speed of sound
depends on the elasticity, density, and temperature of the medium the sound travels through
elasticity
is the ability of a material to bounce back after being disturbed
density
is how much matter, or mass, there is in given amount of space, or volume.
Loudness
describes your perception of the energy of a sound
Loudness
depends on two factors: the amount of enery it takes to make the sound and the distance from the source of the sound
intensity
amount of energy a sound wave carries per second through a unit area
decibel (dB)
loudness of different sounds is compared using a unit
pitch
is a description of how high or low the sound seems to a person
pitch
depends on the frequency of the sound wave
ultrasound
sound waves with frequencies above the normal human range of hearing
infrasound
sounds with frequencies below the human range of hearing
larynx
where vocal cords are located
Doppler effect
change in frequency of a wave as its source moves relation to an observer
Music
is a set of notes that combines in patterns that are pleasing
sound quality of music
results from blending a fundamental tone with its overtones. Renonance also plays a role in the sound quality
fundamental tone
lowest natural frequency of an object
overtones
object's higher natural frequencies
Acoustics
is the study of how sound interact with each and the environment
Acoustics
is used the design of concert halls to control reverberation and interference
reverberation
which the echos of sound are heard after the sound source stops producing sound wave
ear canal
it collects sound waves and directs them into a narrow region
eardrum
is small, tighty stretched, dreamlike membrane
cochlea
is a fluid-filled cavity shaped like a snail shell
inner ear
converts the sound waves into form your brain can understand
middle ear
transmits the waves inward
outer ear
funnels sound waves
injury,infection,exposure to loud sounds, and aging
some causes of hearing loss
Echolocation
is the use of reflected waves to determine distances or to locate objects
echolocation
helps navigate and find food
bats + dolphins
animals that use echolocation
sonar
a system that uses reflected sound waves to detect distances and locate objects underwater
sonogram
an image formed by an ultrasound waves
sonar + ultrasound imaging
Are used to observe things that cannot be seen directly