final Flashcards
Type of tympanogram: A
Means that the function of the middle ear is normal.
Type of tympanogram: As
Means the tympanic membrane is hypomobile.
Type of tympanogram: Ad
Means that the tympanic membrane is hypermobile.
Type of tympanogram: B
Indicates that there is fluid accumulation.
Type of tympanogram: C
suggestive of Eustachian tube dysfunction
If a hearing loss is conductive or has a conductive component, YOU CANNOT
OBTAIN acoustic reflexes (T/F)
True
Where does electrocochleography originate from?
cochlea and auditory nerve
The neural generators for each wave of the Auditory Brainstem Response:
Wave 1 and 2: Cochlear Nerve
Wave 3: Cochlear Nucleus
Wave 4: Superior Olivary Complex
Wave 5: Inferior Colliculus/Lateral Lemniscus
Measures whether a reflex contraction is
maintained or weakens during continuous stimulation (usually 10 seconds)
Acoustic Reflex Decay
What is the importance of signal averaging when gathering data for the Auditory
Brainstem Response (ABR)?
to eliminate the averaging unrelated activity and reveal the auditory evoked potential
Interpeak latency (IPL) of Wave I-III tells us ________ conduction; Interpeak latency (IPL)
of Wave III-V tells us about ________ conduction
Nerve; Brainstem
What is an Auditory Brainstem Response used for?
ABR is utilized as a threshold predictor for infants and children. It is also utilized to help distinguish whether a patient has a cochlear or retrocochlear disorder.
Refers to the technique of measuring auditory late response (ALRs) for the purpose of assessing hearing ability.
Cortical Evoked response audiometry
According to the Joint committee For Infant Hearing (JCIH), Infant screening should be performed prior to ____________ months of age; should receive “comprehensive audiological” evaluation prior to ________ months of age; should receive appropriate intervention prior to _________ months of age.
1, 3, 6
Type of audiometry is performed when a toy is used as a positive reinforcement for look in the direction of the correct sound source?
Operant Conditioning Audiometry
Play behavioral/aud
Tones are presented via earphones or a sound-field speaker
* Children are taught by demonstration to
respond to the tones with a variety of
possible actions
– E.g., placing a ring on a peg, block in a box, or a bead in a bucket
* Success of play audiometry is dependent upon (1) motivation, (2) contiguity, (3) generalization across frequency and
intensity, (4) discrimination, and (5)
reinforcement
Behavioral Observation Audiometry (BOA)
Used during the first 6 to 8 months of age
* Involve the child’s response to a sound through auditory
localization
* For sounds to be localized, hearing thresholds much be
similar in both ears
* If a child does not turn to locate a sound by the age of 8
months, it can be suspected that something is wrong
What is the cross-check principle?
The cross-check principle mentions that relying on one audiometric measure should not be considered valid until you have obtained an independent cross of its validity.
This part of a hearing aid BOOSTS the electrical response and then delivers to the signal to the loudspeaker.
Amplifier
This part of the hearing aid moves in response to the pressure waves of sound, converting the acoustic signal into an electrical signal.
Microphone
The amplifier of a hearing aid DELIVERS its electrical signal to a loudspeaker
Reciever
In the ear (ITE) hearing aid
*aids are grouped into numerous substyles based on size
* For all substyles, the microphone port is located on the hearing aid faceplate
* Microphone location takes advantage of the natural resonance characteristics of the pinna * This advantage increases with ITC and CIC devices as the microphone is located deeper in the outer ear system
Behind the ear (BTE)
- contain the bulk of the hearing aid
hardware in a non-custom case behind the ear - The case is coupled to the ear using a tube or wire
attached to some form of coupler - The microphones are usually located on the top or and on the back side of the device
- External controls for patient manipulation, usually an on/off switch and volume control, are also located on the back side
Receiver-in-the-ear (RITE) or receiver-in-the-canal (RIC) style
- The loudspeaker is located in the ear canal
- The amplified and processed electrical signal is delivered to the loudspeaker via a thin wire running from the body of the aid