W11 Flashcards
What are the 3 management strategies for APD?
- Compensatory Strategies
- Environmental Modifications (EMs)
- Assistive Technologies and Hearing Aids
like a hierarchy
What are compensatory strategies?
− Strategies to improve the learning environment without making physical alterations.
Examples of compensatory strategies:
– Improving self-advocacy and speaking up about communication difficulties
‒ Practicing in mock settings
‒ Using visual aids and lip-reading to enhance understanding.
‒ Providing notes ahead of the class to help the child prepare and reduce reliance on auditory information.
‒ Using recording devices, reduced-speed playback, captions, and note-taking aids
‒ Using alternative methods to take exams.
What are EMs?
They refer to physical changes in the environment
What 4 thing do EMs overcome?
̶ Low SNR
̶ High reverberation
̶ Poor insulation
̶ A low teacher voice level
Classroom ANSI standards: The maximum allowed noise is ____ dB with ____ dB SNR.
35, +15
Classroom ANSI standards: ̶ The speaker-to-listener distance should ideally be less than ____ feet.
3
Classroom ANSI standards: RT (reverberation time) should not exceed ____ sec at frequencies of 500 Hz, 1000 Hz, and 2000 Hz
0.6
Classroom ANSI standards: RT (reverberation time) should not exceed no more than ____ sec for classrooms between 10,000 and 20,000 cubic feet
0.7
Classroom ANSI standards: RT (reverberation time) should be as short as ____ sec for primary schools
0.3
̶Overall, an RT of ____sec for hearing-impaired children/APD and ____sec for hearing peers is recommended.
0.3, 0.6
What is reverberation?
Reverberation is the persistence of sound in a room after the sound source has stopped. Reverberation can interfere
with speech intelligibility.
What 4 reasons is Improving the SNR Important?
̶ Children’s ability to hear in noise doesn’t reach adult-like levels until adolescence.
̶ Children with normal hearing require higher SNR than adults (+10dB vs. +6dB).
̶ Children with hearing loss and APD require higher SNRs than hearing peers (+12 to +20dB vs. +10dB).
̶ While current classrooms often have SNRs ranging from -7 to +5dB, which is concerning.
What are 3 Negative Consequences of Poor Classroom Acoustics (long RTs and low SNRS):
̶ Reduced speech perception, leading to mishearing and spelling errors.
̶ Reduced reading ability
̶ Poor academic achievements
When are the ALDs recommended?
Once EMs can not meet the SNR needs of children with APD,
hearing loss, or learning disability.
4 Types of ALDs:
̶ Personal FM or ear-level FM systems
̶ Sound-field FM systems (placing speakers in the classroom)
̶ Infrared induction loops
̶ Hardwired systems
- The ideal SNR in a classroom is ≥ ____
+15dB.
- FM systems provide an average SNR advantage of ____ dB.
8.3
To determine if a child needs an FM unit for sound enhancement, the following factors should be
considered:
̶ Poor speech-in-noise discrimination
̶ Ability to wear and adapt to the unit
̶ Support of the school or district
̶ Compatibility with the child’s personal aids or other FM units in the classroom
̶ Child‘s willingness to wear without feeling stigmatized
̶ Teacher’s willingness to wear the microphone and transmitter and learn how to troubleshoot
̶ Teacher’s acceptance and willingness to introduce the device to the class
̶ Having solutions for potential interferences from external sources: radio stations, computers, and pagers
̶ Costs for the family and/or the school
Should the FM Be Fitted for One or both Ears?
- Bilateral fitting is generally recommended to improve SNR and sound localization.
- The decision should be individualized, based on the child’s needs.
How can you use sound field amplification systems to improve SNR?
Involving a microphone to capture the teacher’s voice and speakers to amplify and project it throughout the classroom.
What are the benefits of sound field amplification?
− Improved speech perception
− Improved academic achievement
− Enhanced eye contact, attending skills, reduced listening difficulties, and listener fatigue.
− They are not expensive, almost equal to the price of 1 personal amplification system
What are the limitations of sound field amplification?
− They can not overcome the effects of excessive reverberation.
− They increase the overall classroom sound levels, causing distractions for neighboring rooms
The following 5 Hearing aid features can be used to improve SNRs:
̶ Using a hearing aid with a mild gain
̶ Directional microphones
̶ Noise reduction algorithms
̶ Conservative nonlinear processing options (NPO)
̶ Wide dynamic range compression (WDRC) circuits
Define stroke
A neurological deficit caused by vascular damage in the CNS.
What are the 2 types of strokes?
hemorrhagic
ischemic
What is a hemorrhagic stroke?
When bleeding in the brain damages nearby cells.
What is an ischemic stroke?
Blockage of a blood vessel supplying the brain by a blood clot. It is called:
̶ Thrombotic stroke/atherosclerotic stroke, when the clot forms in an artery supplying the brain.
̶ Embolic stroke, when the clot forms somewhere else in the body and travels through the bloodstream to the brain.
What is a Mini-stroke/TIA (transient ischemic attack)?
̶ Due to a temporary blockage
̶ Symptoms usually last for just a few minutes or < 24 hours.
stroke symptoms vary based on the what?
place and extent of brain damage
What are the 3 common symptoms of stroke?
̶ Sudden weakness or numbness on one side of the body
̶ Confusion
̶ Headache
How do you differentiate between a hemorrhagic and ischemic stroke?
To differentiate between the 2 you need imaging
Are there hearing deficits associated with stroke?
– Hearing thresholds are mostly preserved.
‒ HL may occur by disrupted vascular supply to the inner ear or nerve.
Are there auditory processing deficits with stroke?
̶APD reported: Depending on the lesion site and time elapsed since stroke onset:
‒ Deficits in sound localization
‒ Deficits in sound recognition
o Auditory agnosia: Deficits in word, music, or environmental sound recognition (refer to session 7)
o Temporal and spectral perceptual disorders
̶Central deafness is rare.
̶ It may occur due to bilateral impaired auditory cortices or extensive brainstem damage
When does central deafness occur?
Severe head injury affecting the brainstem
OR is both auditory cortices are involved
What were the 4 deficits observed in a 10-year-old child with acquired APD due to severe left hemorrhagic
stroke at 13 months of age?
̶ Sound localization
̶ Speech perception, particularly in background noise.
̶ Speech and language development
̶ Short-term memory and attention (visual and auditory)
- Acceptable performance at school using special education needs strategies.
How does sound get to the brain?
The majority of the
auditory nerve fibers take
a contralateral pathway
from each ear, which
assists in sound
localization and speech
perception
Why were most issues with this child in the right ear?
Most issues are in the right ear, but a stroke on the left side (why? Crossing to the contralateral side)
- If the deficit is in the LEFT ear, the damage is in the RIGHT hemisphere
Not limited to stroke
What test did Jafari et al. (2017) use in their study?
The Musical Emotional Bursts (MEB) Test
was used to assess basic emotions in music
(happiness, sadness, and fear) and neutrality
What were the results of the Jafari et al. (2017) study?
̶ MEB total scores were significantly lower in the stroke groups than in the NC group (p < 0.001).
̶ The RBD group showed lower scores than the LBD group in recognizing sadness (p = 0.047) and neutrality (p = 0.015).
̶ In support of the “valence hypothesis” of right hemisphere dominance in processing negative emotions
What was the conclusion of the Jafari et al. (2017) study?
Conclusion: The stroke affecting the auditory cerebrum can cause acquired amusia with greater severity in RBD than in LBD.
Define TBI
̶ TBI is a disturbance of brain function caused by a bump, blow, or jolt to the head, penetrating head injury, or
explosive blast.
̶ The Glasgow Coma Scale (GCS) is commonly used to classify TBI severity.
Glasgow Come Scale
What are the 2 types of TBI?
contusion
concussion
What is contusion TBI?
‒ When the brain collides with the skull due to direct trauma, leading to tissue damage and hemorrhage.
What is contussion TBI characterized by?
‒ Characterized by localized bruising or bleeding, & neurological deficits (brain structural damage).
what does a contusion TBI commonly affect?
‒ Characterized by localized bruising or bleeding, & neurological deficits (brain structural damage).
What problems are associated with a contusion TBI
‒ Impaired cognitive functions depending on the lesion site (brain functional disruption).
What is concussion TBI?
‒ Is the result of a sudden, jarring movement or blow to the head.
What does concussion TBI not involve?
‒ Does not involve visible structural brain damage or bleeding.
What is contusion TBI characterized by?
‒ It is characterized by a brain functional disruption.
What problems are associated with concussion TBI?
‒ Temporary alteration in brain function, leading to a range of symptoms, such as headache, dizziness, confusion,
memory problems, and changes in behavior or mood.