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Pure Tones Exam
Audiology
| Question | Answer |
|---|---|
| In Air Conduction, what frequencies are testable on the pure tone audiometer? | 125, 250, 500, 750, 1K, 1500, 2K, 3K, 4K, 6K, 8KHZ (some to 20K) |
| The Air Conduction intensities consist of? | -10dB, to 110 OR 120db HL at 500-6KHz (lower max. at 125, 250, 8KHz) |
| In Bone conduction, what frequencies are testable on the pure tone audiometer? | 250 to 4KHZ |
| The Bone Conduction intensities consist of? | 50dB at 250; 70-80 at 500 +0 |
| What are some characteristics on an Audiometer? | -On/Off Switch -Output Selector -Frequency selector dial -Hearing Level Dial -Masking Level Dial -Tone Presentation Bar (button) |
| True or False: During an Audiometer test the ambient noise levels must be controlled? | True |
| How can noise levels be controlled during an Audiometer test? | -Sound-Treated Rooms (double, single) -Earphone Enclosures -Insert Headphones |
| What is the Threshold of Hearing? | Measure softest level at which tones can be heard at least half the time |
| How is the Threshold achieved? | When a patient becomes aware that they hear a tone .. Even when the tone is very soft |
| What four things can be used as Adult Responses? | 1. Hand-Raising 2. Finger-Raising 3. Signal Button 4. Vocal Responses |
| Adult Responses are known as what? | Conventional Audiometric Techniques |
| What is considered a False Negative? | "What was I supposed to do now?" Heard Tone - No Response |
| What is considered a False Positive? | "My head is full of noises; which one do you want me to respond to?" No Tone Presented - But Response Made |
| A clinician's role consist of what two things? | 1. Clear Instruction of Task 2. Positioning of Patient |
| Clear Instruction of Task from the Clinician consist of? | Written and Oral Instruction |
| Positioning of Patient from the Clinician consist of? | The patient not being able to observe client. Right-Angle VS. Back to clinician |
| What is the purpose of Air Conduction Audiometry? | Specifies amount of patients hearing sensitivity at various frequencies. |
| If hearing loss is present, what will Air Conduction Audiometry specify? | The degree of hearing loss |
| What will the Air Conduction Audiometry NOT specify? | Whether the cause of the problem is conductive, sensorineural, or mixed. |
| During an Audiometry Test, what needs to be removed if necessary? | Eyeglasses/Earrings |
| What needs to be pushed out of the way during an Audiometry test? | Hair |
| How do the Diaphragms of earphones need to be positioned during testing? | Over opening to ear canal - BEWARE of collapsing canals |
| During a procedure for AC testing, the starting ear and frequency are? | All other things being equal, arbitrary |
| ASHA recommends testing which ear first? | The better ear, (Right Ear if not known) |
| Which frequency should be tested first in AC? | 1KHz, then 2K, 4K, 8K THEN Retest 1K, then 500, 250, and 125 |
| When should you test half octave? | If more than 20dB between adjacent octaves |
| Where should you always present the tone at? | 30 dB HL |
| If you get a response at 30dB then it would be considered? | Above Threshold |
| If you don't get a response at 30db, where should you then present the tone at? | 50dB HL; and then increase 10dB steps until response is obtained. or limits of audiometer reached. |
| Once a response is obtained, you should decrease by how much? | 10dB |
| If you get No Response, what should you do? | Increase 5dB |
| If you get a Response, what should you do? | Decrease 10dB |
| You continue decreasing/increasing until the dB level has reached what? | A 50% response level (3 out of 6) - this level is THRESHOLD |
| What is Screening? | All or Nothing Test; Patient either responds or not; No effort made to discern the softest sounds that can be heard; Practice can be given |
| During a Screening the subject is conditioned for what? | Hand-Raising or for a conditioned play response |
| What tones are presented during a Screening? | 1, 2, 4KHz presented at 20dB HL to (usually) the right ear first |
| Failure to respond to any stimulus to either ear during a Screening results in what? | A failed Screening and indicates a need for referral |
| Screening hearing is within what scope of practice? | SLP's - Threshold Measurement is not. |
| Where are Thresholds recorded? | On Audiogram (Graphic and/or Numeric) |
| Frequency is always shown where? | On the Abscissa |
| Intensity is always shown where? | On the Ordinate |
| Pure Tone Average? | 500, 1K, 2KHz (if sharply sloping [\], use lowest two |
| How is Hearing Loss often considered? | By the lay public in terms of percentage, but this can be deceiving. |
| In Bone Conduction Audiometry, Vibration of the skull from any location results in what? | Approximately equal stimulation of both cochleas. |
| Interaural Attenuation Rate for BC is theoretically what? | 0db |
| Both ears must be _________________ during routine BC Audiometry | Uncovered |
| Why must both ears be uncovered during routine BC Audiometry? | Occlusion Effect (more of a concern at 1KHz and below - high frequencies not effected) |
| True or False: Procedure followed for BC Audiometry are identical to those for AC? | True |
| Where must the BC vibrator be placed during BC Audiometry? | Either the forehead, or the Mastoid |
| True or False: Testing for BC Audiometry made be done Unmasked or Masked? | True |
| What is Masking? | Masking is delivering a white noise to the non-test ear to remove it from the test procedure whenever there is danger of cross-hearing |
| What is White Noise? | Broadband with approximately equal intensity at each frequency; least efficient |
| What is Narrow Band? | Frequencies surrounding the test frequency; more efficient (Most efficient when width is precisely determined [critical bands]). |
| What is Speech Noise? | Proportional representation of frequencies important in speech; used in speech audiometry. |
| Hearing by BC is the same as AC in? | Normals and those with SNHL |
| Hearing by AC is poorer than by BC in? | Conductive and Mixed Hearing Losses |
| Theoretically, BC cannot be poorer than AC but why is this sometimes found? | Found in Seniors. |
| What is the gap between BC and poorer AC called? | The Air-Bone Gap (ABG) |
Created by:
kaylee_obrien
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