LING 3P97 Chapter 2: chap 2
15 Jan 2016
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Ling 3p97 chapter 2 notes: properties of sound. Acoustics: study of the physical properties of sounds in the environment, how they travel through air and how they"re affected by objects in their environment. Sound is produced as a result of an object being set into vibration. Objects vibrate more easily depending on their mass and elasticity. Standing waves: compression phase meets up with another waves rarefaction phase, result in noise cancellation. Longitudinal wave: when the increases and decreases in pressure occur in the direction of the vibrating object. Waveform: when the pattern of movement is displayed with amplitude as a function of time. Audible range of frequency for humans: 20 -20,000 hz. Period: time it takes to complete one cycle. Frequency counter: determines the frequency of pure tones. 180 degrees out of phase means they cancel eachother out. Starting phase is more relevant for when 2 sound interact with eachother.
