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Intro To Media Arts
Nature of Sound - Terms
38
Other
Not Applicable
05/09/2007

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Term
Medium
Definition
Material though which sound travel
Term
Compression
Definition
Area of higher than normal air pressure
Term
Rarefraction
Definition
Area of lower than normal air pressure
Term
Propagate
Definition
Move
Term
Eustachian Tube
Definition
Passage way of connecting throat and sinuses with the inner ear
Term
Cochlea
Definition
fluid-filled, snail shapped organ, prepares vibration for the brain
Term
Signal
Definition
Variation in air pressure(electrical term)
Term
Frequency
Definition
Number of wave cycles passing a single point in a specific amount of time
Term
Pitch
Definition
Frequency changes
Term
Hertz(Hz)
Definition
Universal Standard unit frequency measurement
Term
Real-time analyzers
Definition
Devices that can recognize frequencies of high and low end sound.
Term
Amplitude
Definition
stregnth of a wave, or amount of energy it carries
Term
SPL(Sound Pressure Level)
Definition
recognized decibels(dB)
Term
Decibel(dB)

dBV(ratio of voltage levels)
dBSPl(ratio to sound pressure level)
Definition
universal unit of amplitude on a logarithmic scale.
Term
Wavelength
Definition
denotes the physical length of a wave divided by speed of a wave by its frequency
Term
Period
Definition
Duration(time required)to complete one cycle of the wave.
Term
Waveform
Definition
describes the actual shape of the wave when its represented graphically in 2-D
Term
Phase
Definition
Measure of the timing differentials among two reproductions of the same wave form
Term
Exponent
Definition
Number of times you have to multiply the forgoing(base) number
Term
Overtoness
Definition
Variant mixtures of many related frequencies that are created simutaneously with a base tone
Term
Logarithim
Definition
Base number
Term
Interference
Definition
Two or more waves occupying the same space and time
Term
Cancellation
Definition
Two identical waves both 180 degrees out of phase
Term
Summing
Definition
All waved combined together
Term
Reflection
Definition
Bouncing of waves that result off the surface of boundaries
Term
Live Room
Definition
A room with great sound reflectivity
Term
Dead Room
Definition
A room with low reflectivity
Term
Reverbation
Definition
Multiple reflections from interactions with multiple boundaries
Term
Standing Wave
Definition
Lack of vibration at certain points
Term
Node
Definition
Two waves out of phase 180 degrees(cancelled)
Term
Anti-node
Definition
Two waves in phase so creates and reinforces sound
Term
Resonance
Definition
Wavelength reinforced by its own reflection
Term
Presbycusis
Definition
Gradually manifesting as the declining ability to hear high frequency sounds with age
Term
Conductive Hearing
Definition
A disease,infection,physical ailment
Term
Central Hearing Loss
Definition
Brain illness
Term
Temporary threshold shift - TTS
Definition
temporary ringing effect
Term
Permanent threshold shift-PTS
Definition
reduces the range of frequencies the ear is equipped to recieve
Term
Tinnitus
Definition
Life time ringing!!!!!!!!!!
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