Please enable JavaScript.
Coggle requires JavaScript to display documents.
Physics - Sound - Coggle Diagram
Physics - Sound
Sound
An object that is vibrating makes a sound wave
The object vibrates air particles, particles collide with other air particles and transfer energy
Longitudinal wave
vibration that cause the sound wave are parellel to the direction of wave travel
Compressions
formed when air particles are close together
Rarefractions
formed when are particles are close together
Wavelength
distance between one compression / rarefraction and the next
Frequency
related to the pitch
Hertz
higher the frequency, higher the pitch
measure of how many sound waves pass a point every second
Amplitude
related to the loudness
larger the amplitude, louder the sound wave will be
Turn a sound wave into an electrical signal using a
microphone
sound wave vibrates a diaphram in the microphone and produces electrical signal
viewed on an oscilloscope
Sound waves vibrate our ear drum
vibrations then turned into electrical signals
sent to brain and interpreted as a sound
Speed of Sound
need particles (a medium) to travel
cannot travel in a vacuum (where there are no particles)
340 m/s
travels faster in liquids and solids than in air
particles in a gas are far apart
particles in a liquid or solid are closer
vibrations are therefore transferred more quickly
travels slowest in gases; fastest in solids
Measure speed of sound in air
Echo
reflection of a sound wave from a surface
When a sound is reflected from a medium some sound is absorbed = not all the sound will be reflected back