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P: Ch.12 Sound
P: Ch.12 Sound
18
Science
8th Grade
05/15/2011

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Term
Loudness
Definition
the human perception of how much energy a sound wave carries
Term
decibel
Definition
the unit that describes the energy carried by sound waves
Term
Pitch
Definition
how high or low a sound seems
Term
Echo
Definition
a sound wave reflected off of a hard surface
Term
echolocation
Definition
Some animals use to navigate and hunt
Term
Doppler Effect
Definition
change in frequency that is due to the motion of a sound source or listener
Term
343 m/s
Definition
speed of sound
Term
music
Definition
A group of sounds that have been deliberately produced to make a regular pattern
Term
Natural Frequencies
Definition
A frequency at which a particular object will vibrate
Term
Resonance
Definition
when an object is made to vibrate at its frequency by absorbing energy from a sound wave or another object
Term
Fundamental Frequency
Definition
The lowest frequency produced by a vibrating object
Term
Musical Instruments
Definition
A device that produces a musical sound
Term
Musical scale
Definition
a sequence of notes with certain frequencies
Term
Stringed Instruments
Definition
methods are used to make the strings vibrate- pluck, struck, bowed
Term
Percussion Instruments
Definition
Are struck to make a vibration on a surface.
Term
Woodwind Instruments
Definition
Change notes by changing the length of the resonating air column
Term
Brass Instruments
Definition
Change pitch by pressing valves to change tube length
Term
hammer, anvil, stirrup (malleus, incus, stapes)
Definition
three bones of the ear
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