ARCH 316 Lecture 2: ARCH315Acoustics
Document Summary
2/16 basic theory and perception light and sound building systems are analogous. Sound can be divided into multiple disciplines: Acoustic is a field that touches a lot of disciplines. Cbc (california bldg code) 2013: relating to room isolation (commerical and residential design), external noise transmission. Osha: occupational safety and health administration; protects health, duration of time being vs permissible exposure level. 100 dba (decibel) = very high the line dictates the point past permanent damage. Anechoic chamber: all 6 surfaces are sound-absorbing, foam edges (devoid reflection), hear your body function, measures direct sound of something, quality, directionality. Cocktail party effect: too much noise in environment so you raise your voice to compensate. Sound moves air particles around a source, propagate spherically, and arrive near eardrums disturbing the air to create sound. Height of amplitude affects level of sound. Energy can be measured in watts, db.
