The dB HL scale
the decibel scale shown on the audiometer dial or screen; allows for comparison of the client's thresholds to average normal thresholds
Damage to the middle ear, with an otherwise normal auditory system, would cause what type of hearing loss
conductive hearing loss
On an audiogram, a sensorineural hearing loss is present when
both air and bone conduction thresholds are outside of normal limits, with similar values
When both air and bone conduction thresholds show hearing loss and thresholds for bone conduction are significantly better than for air conduction, what is the type of hearing loss?
In pure tone threshold testing, the starting intensity level should
be clearly audible, result in a client response that is clearly recognized by the examiner, should be increased o 50 dB HL if there is no response at 30 dB HL
Air conduction thresholds outside of normal limits indicate what?
that there is a dysfunction at some level of the auditory system
A false elevation of low-frequency hearing thresholds would likely occur due to what?
high background noise level in the testing environment
When establishing pure tone hearing thresholds for a patient, the examiner SHOULD NOT do what?
move on to the next frequency after one missed response
What is true of audiometer calibration?
electronic calibration is required on a yearly basis, or sooner if audiometer malfunction is suspected
A client with a threshold of 45 dB HL at 1000 Hz in the right ear
shows hearing sensitivity that is 45 dB worse than the average normal threshold for that sound
Children at ages 5 months to 2 years
respond to sounds with a head turn during visual reinforcement audiometry
What does bone conduction testing measure?
the sensitivity of the sensorineural portion of the auditory system
What is the purpose of the case history interview?
to establish positive interaction between the clinician and client, obtain information that might indicate potential causes of a hearing loss, indicate whether there is a need to modify test procedures, help determine the day-to-day effects of hearing impairment on the client