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What is Audiology Study Notes

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What is Audiology?
- ASHA: the discipline involved in “the prevention of and assessment of auditory, vestibular, and
related impairments as well as the habilitation/rehabilitation and maintenance of persons with
these impairments
- Audiologists provide: assessment, diagnosis, treatment and management
- Habilitative/rehabilitative services
Incidence and Prevalence
- John Hopkins Medicine (2001)
- 12% of US population; 30 million people
- CDC (2009)
- 3 in every 1000 births
- WHO (2012)
- Worldwide, 278 million people
Deafness, Deaf Community, Deaf Culture
- deaf: hearing loss 90dB or greater (profound)
- Deaf community:
- Deafness as cultural trait
- Views deafness with pride
- Unites its members
- Sense of self-identity
- Share common language (group cohesion
- deaf vs. Deaf
- “deaf”: common physiological condition of severe - profound hearing loss
- “Deaf”: members of the Deaf community
Fundamentals of Sound
- Definitions:
- Amplitude: distance vibrating object travels in either direction
- Intensity: determined by amplitude→ decibels (dB)
- Frequency: repeated back-and-forth movement→ cycles per second, Hertz (Hz)
- Sound has volume and pitch
- Volume is an increase in amplitude of a sound wave
- Pitch is a change in frequency
Anatomy and Physiology:
- Auditory System:
- Peripheral Auditory System:
- Outer ear
- Middle ear
- Inner ear
- Vestibulocochlear nerve
- Central Auditory System
- Auditory brain stem
- Auditory cortex of the brain
Outer Ear:

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