Acoustics


 * Acoustics **

**Speed:** distance traveled in unit time (m/s)


 * Frequency:** number of complete waves in one second (Hz)


 * Wavelength:** distance between matching points on the wave (m)


 * Longitudinal:** vibration parallel to direction of travel


 * Transverse:** vibration at right angle to direction of travel




 * Video **

The sound is caused by objects that vibrate and make waves, these objects tend to vibrate due to an impulse that causes movement.

Small objects usually produce short-wave frequencies, which makes the sound be acute, and large objects produce long wave frequencies which makes it more heavy to heard.