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The Nature of Sound
Holt Science and Tech: Sound and Light, Ch. 2
19
Physics
7th Grade
04/23/2012

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Cards

Term
Sound Wave
Definition
A longitudinal wave caused by vibrations and carried through a substance.
Term
Medium
Definition
a substance through which a wave can travel.  Can be a solid, liquid, or gas.
Term
Tinnitus
Definition
a common type of hearing loss caused by exposure to loud sounds.  
Term
Pitch
Definition
how high or low a sound seems
Term
Doppler Effect
Definition
a change in the frequency of a wave when the source or observer is moving
Term
Loudness
Definition
a measure of how well a sound can be heard
Term
Decibel
Definition
the most common unit to measure loudness
Term
Echo
Definition
a reflected sound wave
Term
Echolocation
Definition
the preocess of using reflected sounds waves to find objects; used by animals such as bats
Term
Ultrasound
Definition
a medical procedure that uses echos to "see" inside a patient's body
Term
Interference
Definition
the combination of two or more waves that results in a single wave
Term
Sonic Boom
Definition
the explosive sound created from a shock wave from an object traveling faster than the speed of sound
Term
Standing Wave
Definition
a pattern of vibration that simulates a wave that is standing still
Term
Resonance
Definition
a phenomenon that occurs when two objects naturally vibrate at the same frequency; the sound produced by one object causes the other object to vibrate
Term
Sound Quality
Definition
the result of blending of several pitches through interference
Term
Examples of string instruments
Definition
violin, guitar, banjo
Term
Examples of Wind instruments
Definition

brass - tuba, trombone, French horn

woodwind - oboe, recorder, saxophone

Term
Examples of percussion instruments
Definition
drums, bells, cymbals
Term
Noise
Definition
a sound that consists of a random mix of frequencies
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