Aural Con 2 Flashcards
This involves directing sound waves directly to the cochlea by inducing vibrations using a bone conduction oscillator placed on the mastoid process
Bone conduction
Testing where the sound enters through the external auditory canal, passes through the tympanic membrane, ossicular chain, and eventually the cochlea where the auditory nerve is stimulated.
Air conduction
From the _______ threshold, we can identify the degree or severity of hearing loss
Air conduction
Determining the type of hearing loss of the patient
Bone conduction
What information can we get from the auditor gram?
Type
Severity
Configuration
What ears are affected
Impact of the results on the auditory skills of the patient
What is the main purpose of air conduction?
Identify the degree of hearing loss or severity of hearing loss
By identifying the degree of hearing loss, the SLP may identify what kind of protocol is needed for intervention
What are the types of hearing loss?
Conductive HL
Sensorineural HL
Mixed HL
What areas are affected with conductive hearing loss?
Outer ear and/or middle ear
Example: Impacted cerumen or earwax that blocks the auditory acoustic meatus which will prevent the sound to go to the eardrums
What are the causes of conductive hearing loss?
Fluid in the middle ear from colds
Ear infection and allergies
Poor eustachian tube function
Perforated eardrum (exposure to very loud sounds or due to cotton buds or frequent middle ear infections)
Impacted cerumen
Presence of a foreign body
Absence or malformation of the outer ear, ear canal, or middle ear
What are the causes of sensorineural hearing loss?
Illnesses/virus
Ototoxic drugs
Genetic/hearing loss in the family
Aging (presbycusis)
Head trauma
Exposure to loud noise
What are the areas affected with sensorineural hearing loss?
Inner ears and/or auditory pathway
What are areas affected with mixed hearing loss?
Conductive component and sensorineural component
How do we identify the type if a patient has conductive hearing loss?
Air conduction is impaired while the bone conduction is normal. If the hearing loss is conductive, the inner and neural pathways don’t have any problem. On the other hand, for the air conduction, there will be problems.
How do we identify if a patient has sensorineural hearing loss?
There are problems with air and bone conduction. The gap between the air conduction and bone conduction should not be that much.
How do we identify if a patient has mixed hearing loss?
Both conductive and sensorineural have problems. Additionally, the air and bone gap thresholds should be 15dB or above.
What are the pure tone average frequencies?
500 Hz, 1k Hz, and 2k Hz
These are mid-frequencies that are often found in speech
How do we identify the severity of the hearing loss?
Based on air conduction pure tone average frequencies: 500 Hz, 1k Hz, and 2k Hz
What are the degrees of hearing loss?
Mild HL: 26-40 dB
Moderate HL: 41-55 dB
Moderately Severe HL: 56-70 dB
Severe HL: 71 - 90
Profound HL: 91 above
This is the lowest signal intensity at which the signal (pure tone frequency) can be identified 50% of the time. It is described using db HL
Hearing threshold
This describes people with hearing loss from mild to profound (including those who are deaf and hard of hearing); an umbrella term
Hearing impairment
What is deaf?
Hearing loss is severe that there is little to no functional hearing
What is hard of hearing?
Mild to severe hearing loss; hearing loss with enough residual hearing that a hearing technology or amplification system can still provide adequate assistance to process speech.
What does the configuration show?
Configuration show if sloping towards mild hearing loss in the higher frequencies, or if the person may have hearing loss with lower frequencies
What is an audiogram for?
This is to know what sounds are affected and the sounds where the child has difficulty accessing.
The result of the audiogram is a good reference point for functional hearing skills of the child.
What is the ideal hearing threshold for children?
Ideally, the hearing threshold should be in the speech string banana. It is not enough that it will fall within the speech banana. For the child to be able to clearly hear speech sounds, it has to fall within the speech string beans (within normal hearing range)
Unilateral vs Bilateral
Hearing loss on the one ear (unilateral)
Hearing loss on both ears (bilateral)
Symmetrical hearing loss vs Asymmetrical hearing loss
Is the shape and severity of the hearing loss the same in both ears? (Symmetrical)
Is the shape and severity of the hearing loss different for both ears? (Asymmetrical)
Progressive vs Sudden
Does the hearing loss gets severe over time (progressive)
Was the HL unexplained, rapid loss (sudden)
Fluctuating vs Stable
Did the hl change over time? At times better or worse (fluctuating)
Or is the HL not changing at all (stable)?
High-frequency vs Low-frequency
Did the loss only occur on high-frequency sounds and normal at the lower frequencies (high-frequency hearing loss)
Did the loss occur in the low frequencies and hearing is normal at the high frequencies? (Low-frequency loss)
What are the shapes of HL?
Flat
Sloping
Rising
Hearing loss that is more or less the same at all frequencies is depicted in a straight horizontal line in the audiogram. A person with this type of loss needs the same amount of loudness to hear a sound regardless of the pitch.
Flat
Has little or no hearing loss at low frequencies, severe loss at mid-frequency range, and profound loss at the higher frequencies.
Sloping
High-frequency sounds can be better heard than low-frequency sounds.
Rising
Define the audiological summary test results: Bilateral acquired progressive sensori/neural hearing loss
Hearing loss occurs in both left and right inner ears/auditory neural pathways.
This appeared after birth and also gets severe over time.
Unilateral mild conductive hearing loss
It only affects one ear (either right or left) and occurs in the outer and/or middle ear
Can still do one-on-one conversations
Hearing Loss Range (dB HL): 26 to 40
Bilateral sloping sensorineural hearing loss
Hearing loss occurs in both left and right inner ears/auditory neural pathways.
Has little or no hearing loss at low frequencies and profound loss at the higher frequencies.
Asymmetrical sensorineural hearing loss
Hearing loss is at the inner ear
Asymmetrical: The shape and severity of the hearing loss are different in both ears.
What is the range of human hearing?
20-20,000 Hz
Audiogram record frequencies from 250-8000 Hz. These are necessary for
Speech detection
This is the test method to present tones of different frequencies and intensity levels
Pure tone audiometry (PTA)