Flashcards
Sound
Flashcards do conjunto (13)
- 1What is sound?Sound is produced when something vibrate. When something vibrates, it passes through its surrounding environment, such as air.
- 2What is compression?Compression is the region of space in which air particles are bunched together.
- 3What is rarefaction?Rarefaction is the region of space in which air particles are spread out.
- 4What are the different types of sound waves?The different waves are the transverse wave and longitudinal wave
- 5Explain a transverse waveTransverse wave is a wave in which the medium vibrates at right angles to the direction of its propagation.
- 6Explain a longitudinal waveLongitudinal wave is a wave vibrating in the direction of propagation.
- 7What is an echo?Sound is able to transmit itself through thin objects. Hard surfaces however reflect sound waves which causes an echo.
- 8What is the speed of sound?The speed of sound is the amount of time it takes sound to travel. The more closely packed the particles are in its environment, the faster the sound is.
- 9What materials absorbs sound?Soft materials such as curtain fabric, carpet and cushions absorb sound to produce heat.
- 10What is frequency and pitch?Frequency and pitch is the measurement of the number of vibrations a sound makes.
- 11How is frequency measured?Frequency is measured in hertz (Hz).
- 12What range of frequencies can we hear?As people age their ability to hear high frequencies are reduced. Young people are able to hear up to 20,000 Hz, while most people over 65 can only hear above 5000 Hz.
- 13What is a decibelA decibel is a unit used to measure loudness. It is written like this dB
Informações
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- 9-12 everything FlashCards sobre Sound, criado por bilal mohamed em 11-08-2016.
- Criado por
- bilal mohamed
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- Criado por Omar Allan · 25 jul 2016
- Copiado por bilal mohamed · 11 ago 2016
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