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- 1SOUNDSound is a form of energy made by vibrations.
- 2SOUNDThese vibrations create sound wave that travels through media,like air and water,before reach our ear.
- 3SOUNDSounds waves only travel through matter.
They can travel through gases,liquids and solids but they cannot travel through vacumm. - 4THE SPEED OF SOUNDSounds travels faster through solids than through gases or liquids.
- 5THE SPEED OF SOUNDThe speed of sound is 340 metres per seconds in air.Sound travels at 1,500 metres per second through water and 5,000 metres per second through iron.
- 6ECHO AND REVERBERATION. (DIFERENCE)The difference between an echo and reverberation is the distance between the source of sound and the objects it reflects off.
- 7ECHO AND REVERBERATIONReverberation occurs when reflected sound travels a short distance.When reflects sound in a large distance is called echo.
- 8INTENSITYSound of high intensity are loud.Sounds of low intensity are soft.We measure intensity in decibels (DB).
- 9PITCHThe pitch of a sound depends on its frequencies.Low sounds have low frequencies and high sounds have high frequencies.We measure pitch in hertz(Hz).
- 10TIMBREThe timbre or tone colour of a sound,allows us to recognise what or who is produicing the sound.
- 11NOISE AND MUSICMusic has an identifiable pitch,a pleasant tone and rhythm.Noise does not have an identifiable tone or constant rhythm.When noise is very intense it is called noise pollution.Noise pollution can cause many health problems like hypertension,stress...
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- FlashCards sobre Sem título, criado por laupasgar27 em 21-02-2015.
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