Sound
Door michael ang
1. fastest when
1.1. particles of a medium are closest together
1.2. travelling in a solid > liquid > gas
2. audible frequency
2.1. humans have a frequency range of 20Hz to 20KHz
2.2. frequencies below 20Hz is infrasound
2.3. frequencies above 20KHz is ultrasound
3. speed in air
3.1. 330m/s
4. Pitch
4.1. frequency of the sound wave
5. Waves
5.1. A series of
5.1.1. rarefactions
5.1.2. compressions