07:700:135 Lecture 5: 13912-MusDigAud-2016-09-26
Document Summary
Threshold of hearing: minimum sound pressure level that produces hearing for the average person, db: decibels. Ratio for threshold of hearing (silence and various other types of frequencies) measure amplitude. Around 60 db and up, can"t stay in that loud db for long w. o permanent damage. We have evolved to be able to hear humans. Pan (panorama: placement of sound in the sound eld. Changing panning setting = placing the sound space. stereo invented by alan blumlien at emi (1931: 2 speakers, like headphones. Surround sound: stereo with more than 2 speakers, more than 2 channels (5. 1) Procedure of constraining something from a continuous set to a discrete set of values: in digital sampling. Approximate a range of values by relatively small set of integer values: computer creates a graph. By sampling more often, can more closely match the original analog signal. Bit depth and sample resolution: bit: binary digit. Binary system represents numbers cal values using 1s and 0s.
