Acoustics


 * Speed**: is the distance travelled during a unit of time by a sound wave (m/s).

**Frequency**: is the number of complete waves that pass a point per second (Hz).

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

**Longitudinal**: longitudinal waves vibrate parallel to the direction of travel of the wave.

**Transverse**: transverse waves vibrate at right angles to the direction of travel of the wave.

**Videos:**

Sound is produced when objects vibrate creating waves in the air which make some distorsion causing the sounds. Three different sources of sound give voice to musical instruments: vibrating columns of air, vibrating surfaces and vibrating strings. Three auditory effects of musical sounds: loudness, pitch and quality.