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Who Are Audiologists?
licensed healthcare professionals trained to assess and manage hearing loss, auditory processing disorders, tinnitus, and balance issues across the lifespan.
Audiology is
the branch of healthcare focused on the evaluation, diagnosis, treatment, and management of hearing and balance disorders.
Audiologist Roles & Responsibilities (3)
Diagnosis & Evaluation, Intervention & Treatment, Rehabilitation Services
Diagnosis & Evaluation:
Perform diagnostic assessments for hearing and vestibular (balance) disorders.
Conduct newborn hearing screenings.
Intervention & Treatment:
Prescribe, fit, and manage hearing aids and assistive technologies, Support cochlear implant programs, Cerumen (earwax) management (if trained).
three main interventions
hearing aids, cochlear implants, cerumen management
Rehabilitation Services:
auditory training, speechreading, and listening skill development, vestibular rehab, and tinnitus management
Educational Requirements:
audiologists hold a Doctor of Audiology (Au.D.
Work Settings (7):
Hospitals, private practices, ENT offices, Schools (K–12), universities, VA hospitals, nursing homes
Audiologic Rehabilitation (AR):
Aims to restore communication abilities lost due to acquired hearing loss, focusing on diagnosis, amplification, training and counseling
Audiologic Habilitation:
individuals (often children) with congenital or pre-linguistic hearing loss, Focuses on developing listening, speech, and language skills that never existed before
Key Difference: Rehabilitation = ; Habilitation = .
regain lost skills; build new skills.
Core Components of AR/Habilitation:
Diagnostic evaluation > Hearing aids, cochlear implants, assistive listening devices > Auditory training and speechreading > Speech-language therapy > Communication strategies and counseling > Manual communication > Family/caregiver education and involvement > Psychosocial support and coping strategies > Educational/vocational support
Goals of Audiologic (Re)habilitation
Improve communication and participation > Reduce psychosocial, educational, and vocational impact > Enhance independence, empowerment, and quality of life > Support both individuals with hearing loss and their significant others
If You Learn Nothing Else, Remember
EMPOWERMENT, INDEPENDENCE, QUALITY OF LIFE
Impact of Hearing Loss on Communication
Affects hearing and oral communication: abnormal voicing, reliance on lip reading, etc.
Types of Hearing Loss
Conductive
Sensorineural
Mixed
Pseudohypacusis: Functional/nonorganic
Auditory Processing Disorder (APD)
Consequences of Hearing Loss - PRIMARY AND SECONDARY (4)
Primary: Difficulty in verbal/oral communication development or sustaining
Secondary: Educational, Vocational, Psychological/Emotional, Social
Hull's 11 potential impacts if untreated:
Perceptual, Speech, Communication, Cognitive, Social, Emotional, Educational, Intellectual, Vocational, Parental, Societal
Impairment:
Body structure/function issue
Activity Limitation
Difficulty in communication (primary consequence)
Participation Restriction
Broader life impact (secondary consequence)
Disability
Communication-related difficulty (e.g., can’t detect /s/)
Handicap
Social/emotional/vocational impact (e.g., must quit job)
First educator of the deaf
Pedro Ponce de Leon
Gallaudet
Adopted manual method after being denied oral training
Modern Philosophies in Deaf Education (5)
Emphasis on Speech and Hearing, Manual supplement, language & communication, Cognitive Emphasis, Focus on child/parent well-being
Audiologist Roles (ASHA, 2010):
hearing aid dispensin, ALD fitting/orientation, communication counseling, auditory training, cochlear implants, speechreading
AR for Children (5)
Parental Guidance, Audiologic Services, Auditory Development, Cognitive/Language Development, Speech Development
AR for Adults (4)
Family/Significant Other Support, Audiologic Services, Coping Strategies, Environmental Modifications
Models of AR
CORE & CARE
CORE – Assessment
Communication Status
Overall Participation
Related Personal Factors (attitude types I-IV)
Environmental Factors
CARE – Management
Counseling & Psychosocial: explain
Audibility & Amplification (HIO BASICS for orientation): hearing aid
Remediation of Communication Activities: tactics to control situations
Environmental Coordination & Participation Improvement: assess improvement
Evidence-Based Practice (EBP)
clinical decisions guided by researched Efficacy (lab success), Effectiveness (real-world outcomes), Efficiency, Patient Safety, Cost-Effectiveness
Multicultural & Deaf Culture Sensitivity
DEAF community is a distinct culture, Do not push cochlear implants; provide unbiased information
time of onset - Prelingual
onset at birth or prior to onset of speech and language
Perilingual
deafness is acquired while developing a first language
Postlingual
hearing loss is after the age of 5 (although speech not as affected, education is certainly affected, especially for the younger children)
Deafened
lose their hearing after schooling is complete (late teens or later) – may experience difficulty in verbal communication, social, emotional, and vocational situations.
Hard of Hearing
born/developing a partial loss of hearing, have acquired speech through hearing and oral communication, may be affected abnormal voicing of speech, watching lips, etc
What does "configuration of hearing loss" refer to?
The shape of the hearing loss across frequencies (e.g., flat, sloping, rising, cookie-bite).
What does it mean to be "hard of hearing"?
person has limited hearing but may still use their auditory system for communication.
What does it mean to be "deaf"?
person has extensive hearing loss (usually 80–90 dB HL or worse) and minimal to no auditory function.
What is the starting threshold for mild hearing loss in adults?
26 dB HL (range: 26–40 dB HL).
What is the starting threshold for mild hearing loss in children?
21 dB HL (range: 21–40 dB HL).
Why is the threshold for mild hearing loss lower in children than adults?
Because even slight hearing loss in children can significantly impact speech, language, and educational development.
stages of dealing with hearing loss include
Grief, denial, depression, anger, guilt, anxiety, acceptance
some statistics
3/1000 newborns are born with HL & 1/3 persons over 65 has decreased hearing
Speech Detection Threshold (SDT) aka Speech Awareness Threshold (SAT)
for a child who cannot repeat or an individual who cannot discriminate words but can detect the speech sound. cant get words out of them
Speech Discrimination/Speech Recognition
percentage of monosyllabic words correctly repeated when presented at a level above the SRT (usually 30 or 40 dB SL).
What is the Speech Reception Threshold (SRT)?
lowest level (in dB HL) where a person correctly repeats 50% of spondee words—usually 2 out of 4 correct.
What is the difference between SRT and Speech Recognition testing?
SRT uses spondee words to find the softest level for 50% accuracy; Speech Recognition uses monosyllabic words at louder levels to assess clarity of hearing.
3 levels of hearing:
sound pressure level (SPL), hearing level (HL) and sensation level (SL)
What is Sound Pressure Level (SPL)?
An absolute way to measure sound, like using Celsius for temperature. Used in hearing aid testing.
What is Hearing Level (HL)?
A relative sound scale based on average normal hearing. 0 HL means "normal" hearing.
What is Sensation Level (SL)?
The number of decibels above a person's hearing threshold.
What is a Threshold?
The quietest sound a person can hear 50% of the time.
What is Air Conduction (AC)?
A hearing test through headphones, using air to deliver sound.
What is Bone Conduction (BC)?
hearing test using a vibrator on the bone behind the ear, testing the inner ear directly.
What is Masking?
Playing noise in the opposite ear to keep it from helping during a hearing test.
Air conduction tells you
the degree of severity of hearing loss (mild, moderate, severe, profound).
Bone conduction tells you
the type of hearing loss (conductive, mixed, sensori-neural).
Speech discrimination gives you
idea of how well they will do with remediation so counseling is appropriate.
normal degree of loss in dB
-10 to 25
mild (early hearing loss) in dB
25 to 40
moderate HL in dB
40 to 60
severe HL in dB
60 to 90
profound HL in dB
90 and above
RED is always
right ear
BLUE is always
left ear
outer ear
pinna collects sound and ear canal channels sound
middle ear
eardrum changes sound to vibrations and ossicles amplify/carry vibrations to fluid of inner ear
inner ear
cochlea hearing, har cells change wave energy to electrical impulses
semicircular canals
balance
vestibule
balance
types of energy in outer ear > middle ear > inner ear > auditory nerve
acoustic > mechanical > hydraulic > electrical
4 causes of permanent hearing loss
noise, aging, vascular insult, meniere’s
4 causes of non permanent hearing loss
perforated eardrum, middle ear infection, disarticulation of ossicles, Eustachian tube dysfunction
3 ossicles
incus, malleus and stapes
2 windows
oval and round