Audiology Final Flashcards
(27 cards)
Ch. 7 Speech Audiometry
What is the goal of speech audiometry?
To quantify the patient’s ability to hear and understand everyday speech
Ch. 7 Speech Audiometry
What is Speech Detection / Speech Awareness Threshold?
The lowest level at which speech can be detected
Ch. 7 Speech Audiometry
When is SDT/SAT used?
When SRT can not be obtained
Eg. Infants and young children or patients with impaired cognition
Ch. 7 Speech Audiometry
What is SRT?
Speech Recognition Threshold; to provide an anchor to compare pure tone thresholds against
Ch. 7 Speech Audiometry
What is the stimuli for SRT tests?
Bisyllabic words
Recorded or monitored live voice (MLV)
What is WRS?
Word Recognition Score; percentage of correct words recognized (repeated) at a suprathreshold
True or False: SRT can be performed before PTA
True
What should the difference between PTA and SRT?
+/- 7; if the difference is more than 7, something is not right
Why is Speech recognition in competing noise/speech test important?
- Understanding speech with competing noise is one of the biggest complaints among people
- Will help audiologist diagnose type of hearing loss and specific hearing aid needs
Ch. 9 Immitance Measuring
What is Immitance?
A term that combines the words “Impedance” and “Admittance”
I: the extent a system resists energy
A: ease at which energy flows
What are the four Immittance measures?
- Tympanometry
- Static admittance
- Ear canal measures
- Acoustic Reflex Thresholds (ART)
What does a Type A tympanogram mean?
Normal middle ear function
What does a Type As tympanogram mean?
Stiffness of middle ear system
Possible causes: osteosclerosis or scar tissue build up on ear drum
What does a Type Ad tympanogram mean?
Flaccid middle ear system
Causes: Ossicular discontinuity
What does a Type B Tympanogram mean?
Extreme stiffness
Possible causes: otitis media, impacted cerumen, perforated eardrum
What does a Type C Tympanogram mean?
Abnormally negative ear pressure
Possible causes: Eustachian tube malfunction, end of ear infection, allergies, cold
What are the norms for immittance audiometry?
Under and above 0.3-1.7
Under = As; Over = Ad
What is Acoustic Reflex Threshold (ART)?
The acoustic reflex is the contraction of the stapedius muscle to loud noises.
ART is the lowest intensity level (dB HL) at which an acoustic reflex can be elicited.
What are the subtypes of evoked OAEs?
Distortion Product OAEs - two different test tones presented to the same ear
Transient Evoked OAEs - elicited with a brief stimulus (like a click)
What are the limitations of OAEs?
Does not provide information about anything beyond the cochlea
What are AEPs?
Evoked brain activity in response to an auditory stimulus
What is latency?
The time it takes for a response (peak) to occur after the stimulus has been presented (the first 5 peaks)
What is signal averaging?
Sums AEP waveforms over time
What is ABR?
Auditory Brainstem Response; the firt 5 peaks after an AEP. Occurs within the first 10ms of stimuli.
