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Chapter_10_mc - Hearing and Its Disorders Chapter 10 When...

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Hearing and Its Disorders Chapter 10
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When silence and quiet are biologically imposed, the  human experience is profoundly altered.                                        M. N. Hegde in  Introduction to COMD Language transforms experience…Through language… one can induct the child into a purely symbolic realm of  past and future, of remote places, of ideal relationships,  of hypothetical events, of imaginative literature, of  imaginary entities ranging from werewolves to pi- mesons…                                         Joseph Church in   Language and the Discovery of  Reality,  1961
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The learning of language transforms the  individual in such a way that he is enabled to do  new things for himself, or to do old things in new  ways.  Language permits us to learn things at a  distance, to act on them without physically  handling them.
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With language we can   Act on other people, or on object through people Manipulate symbols in ways impossible with the things  they stand for, and so arrive at novel and even creative  versions of reality Verbally rearrange situations which in themselves would  resist  rearrangement Isolate features which in fact cannot be isolated Juxtapose objects and events far separated in time and  space Turn the universe symbolically inside out
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ACOUSTICS Acoustics is the study of sound as a physical  event; as a psychological event, it is called  psychoacoustics Sound is an audible disturbance of a medium;  there are also sounds that humans cannot hear  because they do not generate a sensory  experience in the ear
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http://www.youtube.com/watch?v=cK2-6cgqgYA Sound Waves and Their Sources  (covers basics of  acoustics)
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THE SOURCE OF SOUND Vibrations  are the source of sound Vibrations occur in  cycles Cycles are repeated patterns of movement  measured per second A cycle = one compression + one rarefaction 1 cycle per second = 1 Hz (Hertz) Two sounds of the  same  frequency produce a  pure and simple  tone Two sounds of  different frequencies  produce  complex  tone Complex tones may be Periodic  – regular repetitions Aperiodic  – irregular repetitions, usually perceived as   noise
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SOUND WAVES The to-and-fro movements of molecules The molecules do not move from point A to point  B.  It is energy that is transferred, not matter.
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ACOUSTICS Pitch:  Perceptual correlate of frequency; when  the frequency changes we hear different pitches Frequency is physical and pitch is perceptual. Amplitude:  The extent of the molecules 
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This note was uploaded on 04/06/2011 for the course COMD 2081 taught by Professor Domma during the Spring '08 term at LSU.

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Chapter_10_mc - Hearing and Its Disorders Chapter 10 When...

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