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The speed of sound ___________ as the temperature increases
increases
The speed of sound in air is approximately
330–350 m/s
Humans can hear sounds between about_____ frequency
20 Hz and 20 000 Hz
___________ sound waves are low pitched
Low frequency
High _______sound waves are high pitched
frequency
Low amplitude sound waves are _______
quiet
High amplitude sound waves are _________
loud
The _________of a sound wave is related to the loudness of the sound:
amplitude
Speed of sound =
distance/time in one direction
___________uses ultrasound to detect objects underwater
Sonar
Sound waves with a frequency greater than _________ are called as ultrasound
20 000 Hz
sound travels faster in _____than in ____and faster in liquids than in ____.
solids -liquids -gases
_____________ are More dense region, while _______ are less dense regions
Compressions, Rarefactions
Particles in Rarefactions are ___________
further apart
Particles in Compressions are __________
close together
Sound waves are a type of ______
longitudinal waves
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