CSD 306K Lecture 4: Lecture 4

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The$severity$can$vary$on$the$frequency.$(you$can$have$a$severe$loss$in$one$frequency$and$a$mild$loss$in$
another)$
$$
In$speech,$high$frequency$sounds$are$more$noise$with$the$higher$frequencies.$Vowels$can$be$typically$
lower$frequency$sounds.$$
$$
You$have$a$bilateral$loss$where$it$is$a$loss$in$both$ears$or$a$unilateral$loss$where$it$is$only$in$one$ear.$
$$
Hearing$Disorder$Types:$$
Conductive$Loss$
o Outer/Middle$ear$
o Bone$conductive$normal/Air$Conductive$impaired$
o Air-bone$gap$
Ear$Infection$
Damaged$Ear$Drum$
Ear$Wax$
Sensori-neural$Loss$
o Inner$ear/retro$cochlear$
o Both$bone$and$air$conductive$air$impaired$
Cochlea$itself$is$damaged$$
Wont$be$able$to$hear$correctly$$
Mixed$
o Both$BC$and$AC$with$gap$between$$
Bilateral$or$unilateral$
$$
$$
It$is$going$to$be$worse$to$have$a$moderate$loss$at$birth$than$having$a$moderate$loss$at$old$age.$This$is$
because$they$would$not$be$able$to$pick$up$language$as$quickly$as$a$child$would.$$
$$
Communication$Sciences$and$Disorders$-$The$Discipline$
The$study$of$communication$disorders$and$differences$
Study$the$efficacy$of$practices$involved$in$assessing$and$treating$individuals$with$communication$
sciences$and$disorders$and$differences$
$$
Speech,$Language,$Hearing$Scientists$
Academic$preparation$
o PhD$(usually)$
Conduct$research$
o Investigate$anatomical,$physiological,$and$perceptual$factors$underlying$communication$
What$muscle$are$involved$in$production$of$fluent$speech?$
What$parts$of$the$brain$are$responsible$for$understanding$language?$
How$do$children$decide$when$one$word$ends$and$another$begins?$
Knowledge$of$basic$processes$of$speech,$language,$and$hearing$underlies$our$understanding$of$
disability$
$$
Speech$Language$Pathologist$Background$
Speech$Therapists$-$1920s$
Speech$Correctionist$
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