Quiz 3 Flashcards
AAA HAT steps
Potential Candidacy (Step 1)
5.2 Implementation (Step 2)
5.3 Device Selection (Step 3)
6. Fitting and Verification Procedures
(Step 4)
7. Implementation & Validation
Procedures (Step 5)
what % of school day involves listening?
60-75% of the school day
involves listening activities
why elementary and preschool children are most affected by noise
inefficient, broadband listening strategy
▪ Inefficient auditory closure
▪ Immature weighting of acoustic information
▪ Increased susceptibility to distractors
▪ Immature ability to segregate concurrent
signals from noise
inverse square law
for every doubling of distance from
the speaker, the decibel level of the speaker’s voice
decreases by 6dB SPL
sources of reverberation
Hard ceilings without acoustic tiles
* High ceilings (+10ft)
* Painted ceiling tiles
* Ceilings with many light fixtures
* Hard floors (tile, linoleum, wood)
* Oddly shaped classroom
* Large classroom
* Hard wall surfaces without corkboard or acoustic
panels
* Large window banks
how to calculate SNR
signal - noise
kids with HA need ____ SNR to hear
+15
dBA vs dBC
dBA scale – emphasizes sounds in a similar frequency
range as response of the ear (500-10,000 Hz)
* gives less weight to low frequencies that are less
impactful for our speech understanding
* dBC scale- measures uniformly over the frequency
range of 30-10,000 Hz
* more common for measuring machinery noise
Class acoustics screening protocol
- observation of class room enviornment
- noise measurements
3.reverberation analysis - critical distance: the
distance from a speaker
where the speaker’s voice
level is equal to that of the
echo/reverb
Delivering info to the families
problem solving partnership between you and the family
understand that families use gut feelings to make decisions
professionals can support families by respecting their choices
peer to peer relationships can be helpful for families
Role of audiologist over time
emotional support turns into emotional strength
informational counseling turns into knowledge
facilitation and advocacy turns into empowerment
How to reduce noise in a classroom
carpeting
tennis balls under chairs
monitor HVAC system
close doors and windows
curtains over windows
Childrens speech perception performance does not reach adult level until _______ years old
13 or 14
What level of reverberation do people with hearing loss need?
0.4-0.5 seconds
As SNR decreases and reverberation time increases, speech intellibility _______
decreases
