sound Flashcards
how is sound produced?
sound is produced when something vibrates back and forth very quickly
what are the names of the region of space and bunched up areas that vibration creates?
compressions and rarefactions
what is compression?
compression is the bunched up areas of particles in a sound wave
what is a rarefaction?
rarefaction is the spaced out areas of particles in a sound wave
sound waves are like what example? how do they move?
sound waves are like water in a ripple effect and they move outwards
what does sound rely on?
sound rely on vibrating particles
what are sound waves?
sound waves are a high and low pressure coming from a vibrating object and carried in waves
what can sound travel through?
sound can travel through solids, liquids and gases but not through a vacuum, where there are no particles
what do waves carry? and in how many waves?
waves carry energy from one point to another, in two ways
what is a transverse wave?
a transverse wave is a wave that can carry wave horizontally, but the particles make up the wave moves in vertical direction
what is a longitudinal wave?
a longitudinal wave is a wave that can carry energy back and forth the same direction the wave is travelling.
sound waves are transmitted through material as…
a longitudinal wave
the particles of the material…
vibrate as energy flows through it
how fast can sound travel?
sound can travel at 340 metres per second
the speed of sound depends on the quality of the material. what happens if the material is dense and has compact particles?
the compressions and rarefaction will travel quickly
how does sound travel in warm and cool water?
sound travels faster in warm water than cooler water. the same goes with air.
what can reflect sound waves?
hard surfaces, bathroom tiles and concrete can reflect sound waves
what is an echo?
an echo is a sound that is reflected and can be heard a second time
what is the technique of sonar?
the technique of sonar is when you measure the difference between sending and receiving an echo. the difference can be used to find the depth of an object
how is the sonar used at sea?
sonar is used at sea by when people on a ship send a wave into the water and waiting for it to hit an a surface and return back to the ship. with this, we can calculate the depth of the object underwater by measuring the time taken for the sound wave to hit the object and return to the ship
what does sonar stand for?
sound navigation and ranging
what happens if a series of echoes reflect off surfaces
if a series of echoes reflect off many surfaces then the echoes can be heard for short amount of time
what is reverberation?
the length of time a sound can be heard
what absorbs sounds and turns it into heat?
soft materials
