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  • Created by: leena
  • Created on: 08-06-12 01:15

musical sounds

the pitch of a note depends on the frequency of the sound waves

the higher the frequency of the wave the higher the pitch of sound

the loudness of a sound depends on the ampitude of the sounds waves 

the greater the ampitude the more energy the wave carries and the louder the sounds

vibrations created in an instrument when played produces sound waves

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wave properties diffraction

diffraction is a property of all waves when they pass through a gap or an obstacle

the narrower a gap the greater the diffraction

if radio waves do not diffract enough when they go over a hills,radio and tv reception will be poor\

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sound

caused by mechanical vibrations

travel through liquid solid and gasses 

travel fater through solids than gasses 

cannot travel through a vaccum 

sounds waves are longitudual

the frequency range of the normal human ear ranges from about 20Hz to about 20kHz

-only hard,flat surfaces such as flat walls and floors reflect sounds

-soft things lie carpets,curtains and furniture absorb sounds

am empty room will sound different once carpets curtains and furniture are put into it

sound waves can be refracted. refrection takes place between layers of air at different tempretures 

sounds waves can also be defracted

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