Amplitude and Frequency
Audiometer and Test Environment
Audiological Evaluation
Nature of Hearing
Audiological Evaluation Pt. 2
100
The unit that measures the frequency of sine curves in sound (number of vibrations per second).
What is Hertz?
100
This process adjusts the settings on an audiogram to normal-hearing levels.
What is calibration?
100
These are some purposes for audiological evaluation.
What are: determining localization of lesion, describing the degree of hearing loss, establishing a cause of problem, estimating the effect of the handicap, and determining a patient's treatment needs.
100
These two things need to be measured to test a patient's ability to hear.
What is the perception of intensity and frequency?
100
This term is defined as being the softest sound that a patient responds to 50% of the time.
What is threshold?
200
Unit of sound intensity or pressure.
What is decible (dB)?
200
Sound treated rooms must have this to measure 0dBHL at all frequencies.
What is ambient noise?
200
This type of testing looks at the outer ear to the inner ear and determines the degree of hearing loss.
What is air conduction?
200
These tests measure the ability to detect differences between two sounds.
What are difference limen tests?
200
The inner ear and cranial nerve VIII are tested by this method.
What is bone conduction?
300
The average amount of sound power (sound energy per unit time) transmitted through a unit area in a specified direction.
What is intensity?
300
This downward facing symbol added to an existing audiogram symbol means no response.
What is an arrow?
300
These tools can be used for bone conduction testing.
What is a bone vibrator or oscillator?
300
Method of limits, method of adjustment, and method of constant stimuli.
What are the classic psychophysical tests?
300
These case history components should be included for a pediatric patient.
What are: development speech and language history, maternal pregnancy and birth history, and observations.
400
500Hz - 6000Hz
What are the frequencies that humans are most sensitive to?
400
These two audiogram symbols are used for AC Masked for right and left ears, respectfully.
What are a triangle and a square?
400
These modified testing procedures can be used on patients with disabilities such as mental retardation, neurologic impairments, or psychiatric conditions.
What are visual reinforcement audiometry (6 months to 2 years) and conditioned-play audiometry (2 to 4 years)?
400
The ability for one sound to cover another so that it cannot be detected.
What is masking?
400
This is the intensity level that testing usually starts at.
What is 30dB (or 50dB)?
500
The amount of back and forth movement (maximum and minimum air pressure variation)
What is amplitude?
500
These two symbols on an audiogram represent AC Unmasked for the right and left ear, respectfully.
What is a circle and an X?
500
These are some components that a good case history should include.
What are: IDing patient info, other medical problems, prior or current use of amplification, and history of past/present hearing issues.
500
This fuses similar sounds together as they enter each ear.
What is binaural hearing?
500
Factors that affect test results.
What are: testing environment, bone oscillator placement, false positives/false negatives, maintenance and calibration
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