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acoustics notes week 2

by: Alicia Notetaker

acoustics notes week 2 CDS 289

Alicia Notetaker
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About this Document

these notes cover week 2 of acoustics
General and Speech acoustics
Karl Sarvestani
Class Notes
Acoustics, CDS 289




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This 2 page Class Notes was uploaded by Alicia Notetaker on Sunday February 7, 2016. The Class Notes belongs to CDS 289 at University at Buffalo taught by Karl Sarvestani in Spring 2016. Since its upload, it has received 25 views. For similar materials see General and Speech acoustics in Journalism and Mass Communications at University at Buffalo.


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Date Created: 02/07/16
Alicia Fursich DAY 3 General and Speech Acoustics (SLIDE 19) when its moving the most: most kinetic -horizontal axis: time, vertical axiz: displacement -displacement: has direction (distance doesn’t) (SLIDE 20) (SLIDE 21) as time goes on, displacement increases and it gets as far as it is going to go, after rolls up other side of hill, starts going back in other direction, past rest position where will come to rest at bottom of hill, rolls up other side, displacement is in other direction so it is negative. -positive peaks get lower and lower, neg peaks get higher and higher, boulder rolling less—energy in system being converted to heat (dissipation) (SLIDE 22) waveform did not exactly repeat itself bc of dissipation (slide before) (SLIDE 23) (SLIDE 24) frequency will be more important than period (SLIDE 25) (SLIDE 26) period smaller, frequency doubles (SLIDE 27) amplitude is looking at displacement but don’t care about direction, care about the value (SLIDE 28) visual idea of what different measures of amplitude look like (SLIDE 29) (SLIDE 30) (SLIDE 31) (SLIDE 32) (SLIDE 33) squaring it because it’s a 2 dimensional surface (SLIDE 34) (SLIDE 35) (SLIDE 36) transverse wave is the wave we normally think about -particles are going up and down -parts of slinky bunched up: compression, part where spread out: rarefaction -sometimes transverse waves happen to look like a waveform (SLIDE 37) (SLIDE 38) f,s,p,t,k all consonants (SLIDE 39) higher amplitude-more loud amplitude: physical loudness: people perceive it Alicia Fursich DAY 4 General and Speech Acoustics (SLIDE 40) (resonance) oscillation: vibrations propagating sound through air -oscillating more: amplitude greater: louder -all objects have natural frequency: particular frequency that object can be vibrated at (SLIDE 41) if all we had was resonance and no impedance vocal tract would forever be producing same sound, they would never end (SLIDE 42) (SLIDE 43) (SLIDE 44) (SLIDE 45) mass reactants and compliance reactants are cancelled out -the sharper the peak the lower the resistance (SLIDE 46) (SLIDE 47) (SLIDE 48) (SLIDE 49) (SLIDE 50) (SLIDE 51)


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