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Acoustics CDS 289

by: Alicia Notetaker

Acoustics CDS 289 CDS 289

Alicia Notetaker

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About this Document

These are the notes for the first week of class
General and Speech acoustics
Karl Sarvestani
Class Notes
general and speech acoustics, CDS 289
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This 2 page Class Notes was uploaded by Alicia Notetaker on Sunday January 31, 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 22 views. For similar materials see General and Speech acoustics in Journalism and Mass Communications at University at Buffalo.

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Date Created: 01/31/16
Alicia Fursich CDS 289: General and Speech Acoustics Introduction DAY 1 (SLIDE 1) (SLIDE 2) (SLIDE 3) (SLIDE 4) evolutionary adaptive: something changes to make it easier to survive (SLIDE 5) (SLIDE 6) (SLIDE 7) (SLIDE 8) (SLIDE 9) (SLIDE 10) (SLIDE 11) DAY 2 (SLIDE 1)(sound) scalar: you can’t have positive and negative measurements (SLIDE 2) Milli ** millimeters, milliseconds, Deci *** -with sounds we use small numbers (SLIDE 3) displacement will have direction and involves movement -velocity-similar to speed: distance over time (not too important for this class) -Acceleration**: how much speed is changing over time -only want to know about velocity bc we want to know about acceleration -something is moving forward but acceleration is moving in the other direction it will slow down -directions can be the same but they can also be different (deceleration) -deceleration will be important for harmonic resonance (SLIDE 4) distance can be longer even though displacement is the same -distance is unlikely to be less than displacement unless you go back (SLIDE 5) constant velocity: car is traveling same speed (cruise control) so over time velocity doesn’t change but position over time does change because you’re moving (not going in circle) start out 0 miles from home then 1 mile then 2 miles then 3 -constant acceleration (bottom graph) minute 1 0mph, minute 2, 12 mph, minute 3 24 mph: speed and which you’re speeding up is staying the same, position at time is rising exponentially: speed is increasing in linear fashion (SLIDE 6) inertia: and object at rest will stay at rest if it is in motion it will stay in motion unless another object or force is added -heavier objects have more inertia -how much energy you have to put into force is how heavy it is and how fast you want it to go (SLIDE 7) the more force you put into something the more it will accelerate (the more quickly it will get faster) -if you take the same force on a heavier object it will accelerate less -bottom diagram: force is same but area is different. Same force across smaller area=higher pressure. Same force across larger area=lower pressure (SLIDE 8) work: when you apply force and produce displacement (SLIDE 9) energy*** -potential energy stored by compression: how sound is propagated through air (SLIDE10) (SLIDE 11) (SLIDE 12) (SLIDE 13) (SLIDE 14) transfer of energy in system in formation of heat (SLIDE 15) (SLIDE 16) (SLIDE 17) (SLIDE 18) (simple harmonic motion)


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