Acoustics

__**Definitions: **__ Speed: Distance travelled in unit time Frequency: The number of cycles of the repetitive waveform per second Wavelength: The distance between one peak or crest of a wave of light, heat, or other energy and the next corresponding peak or crest. Longitudinal: Vibration parallel to direction of travel Transverse: Vibration at right angle to direction of travel

** __Videos__ ** Sound waves and their sources: Sound is created when an object vibrates, it travels through the air in waves. 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.

** __Notes__ ** Reverberance: is linked to the speed at which sound energy disappears in a room. An unfurnished room with hard surfaces, such as a church, is perceived as being more reverberant than a well-furnished living room.

Soundproofing (sound blocking): If the objective is to stop sound from entering or leaving a space, then you will most likely need sound blocking or soundproofing.

Sound absorption (acoustic enhancement): If the objective is to enhance the properties of sound by improving speech clarity and sound quality, then the answer is sound absorption or acoustic enhancement.