COSC 109 Lecture Notes - Nyquist Rate, Digital Audio Workstation, Sine Wave
31 Jan 2014
School
Department
Course
Professor
Document Summary
Cosc 109 chapter 4: fundamentals of digital audio. Sound is a wave that is made by vibrating objects in a medium like air. The frequency of a sound wave refers to the complete number of cycles of vibrational motion of the medium particles per unit of time: frequency is measured in hertz ( hz, 1 hz = 1 cycle/second. The following image has 3 cycles therefore it has a frequency of 3hz. Pitch is a sound frequency, the higher the frequency the higher the pitch. Human ears can hear sounds ranging from 20hz to 20,000hz. The difference between sound intensity and loudness is that sound intensity can be : heard in decibles (db, measured by auditory devices, has objective measurement. Loudness is: subjective perception, measured by human listeners, human ears have different sensitivity. In general higher sound intensity means louder sound. Most audio editing programs use decibels for audio amplitude.
