Media, Information and Technoculture 2550A/B Study Guide - Final Guide: User Experience, User Interface, Decibel
29 Mar 2017
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Document Summary
20hz - 20,000hz = perfect human hearing. For someone to flap their arm 1x per second, they"d need to flap their arm 20x per second to make sound. Dynamic range: amplitude -> volume -> decibel (db) or volume unit -> how far from rest o o o. Rms -> root mean square the average volume. 0db - threshold of hearing - different for anyone and frequency dependent. Natural harmonic series -> the volume and speed of which something moves is defined natural series - We localize sound based on: o o o timing differences frequency differences amp/vol differences. 3db = 2x sound (cannot be heard by ear) Change sound energy into physical movement with a needle (like records) Digital to analog (to hear: digital analog converter (dac) tells wave to curve o. Can sound different on each converter, changes the sound. Establishes necessary sample rate to hear the sound: must have sample rate of 40kh2 o o.
