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Week One Notes

by: Chelsea Notetaker

Week One Notes SPAA 260

Chelsea Notetaker
GPA 3.5
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About this Document

These are the notes for week one in Speech Acoustics.
Speech Acoustics
Dr. Shaffer
Class Notes




Popular in Speech Acoustics

Popular in Linguistics and Speech Pathology

This 2 page Class Notes was uploaded by Chelsea Notetaker on Sunday January 17, 2016. The Class Notes belongs to SPAA 260 at Ball State University taught by Dr. Shaffer in Spring 2016. Since its upload, it has received 58 views. For similar materials see Speech Acoustics in Linguistics and Speech Pathology at Ball State University.


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Date Created: 01/17/16
Speech Acoustics Key Words: Vibration 1 Vibration is the source of all sound. What makes up sound? Bioacoustics  Physical attributes  Perceptual attributes Substrate-born Vibration  Source Filter Theory; Bioacoustics: Speech Sounds vs. Animal Sounds Vibration Bioacoustics is a cross-disciplinary science. Many different people work in bioacoustics from Magnitude different fields of work i.e. SLPs, physicists, audiologists, etc. Bioacoustics is the study of Scalar Quantity how sound is produced and received. Vector Quantity Example: Kangaroo Kangaroo rat: communicates by striking feet against the ground Newton’s First Law of Motion in order to produce vibrations to warn against enemies, as well as detect other rat Oscillatory Motion species which also have “foot drumming” patterns. Resonance Foot drumming is a substrate-born vibration, or a vibration that passes through a solid. Vibration is a motion, or displacement over time. Magnitude: size of a quantity. A scalar quantity is a measurement of only the magnitude of a medium. A vector quantity is the measurement of both the magnitude and direction of movement a medium has taken. Newton’s First Law of Motion: Newton’s An object will remain in a state of rest or uniform motion unless it is acted upon by an outside, unbalanced force.  Unbalanced forces can change the speed and direction of motion, causing acceleration and deceleration. A vibration is an oscillatory motion, or a movement that is directed one way and returns in the exact opposite direction. Resonance is an object’s tendency to vibrate at its natural frequency. Summary: Key Words: SPAA 260 Newton’s Second Law: the acceleration of an object depends on two variables- the net force acting upon the object and the mass Newton’s Second Law of the object. Tymbals Vibration starts from a point of equilibrium, or a rest position. From this point, we know forces are balances. When a force is applied, it moves Stick-slip Vibration back and forth, and its velocity, displacement, etc. changes “File and Scraper” Eventually the movement will die out because of friction. Kinetic energy is converted to thermal energy and is lost. Ear drum is set into vibration by moving air particles. Example: treehopper Treehoppers use their legs and bodies to create vibrations which can be heard by other insects through the leaves and stems they stand on. Tymbals are percussion organs found in many insects.  Cicadas have specialized drumming organs within their bodies such as this. Stick-slip vibration: friction results from intermolecular attraction. Crickets use a “file” and a “scraper” to create vibration. When they move their wings against each other to create sound, this is what is occurring. N


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