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5.AUD-PTA
Audiology SLP314
| Question | Answer |
|---|---|
| What is pure-tone audiometry? | The measurement of hearing thresholds for pure tones of various frequencies using standardized equipment and procedures |
| What two things must happen before conducting an audiometric test? | 1. Case history 2. Otoscopy |
| What 4 pieces of info should the case history collect? | 1. Nature of hearing problems (past and present) 2. Family history of hearing loss. 3. History of noise exposure 4. Other medical probs and prior amplification |
| What two areas are inspected during an otoscopy? | 1. Ear canal 2. Ear drum |
| What 4 things does otoscopy look for in ear canal? | 1. Foreign objects (esp. children) 2. Ear wax (refer for cleaning) 3. Inflammation/irritation 4. Dried blood |
| What does otoscopy look for during ear drum inspection? | 1. Coloration 2. Distension/ bulging 3. Fluid 4. Scars or tears 5. "Cone of light" (healthy) |
| What instrument measures pure tone hearing thresholds at various frequencies? | Audiometer |
| What does 0-dB HL represent? | Normal-hearing sensitivity for the average young adult ear. |
| What frequencies are tested during pure-tone audiometry? | 250Hz, 500Hz, 1000Hz, 2000Hz, 4000Hz, 8000Hz |
| What is the decibel range on an audiogram? | -10 to 110 dB |
| What term refers to physical measurement of sound with meter? | dB SPL (sound pressure level) |
| What intensity measure do audiometers use? | dB HL (hearing level) |
| What frequencies does the human ear hear more easily? | Middle frequencies. |
| What frequencies require greater intensity for the human ear to hear? | Low and high. |
| What is an audiometric threshold? | Level at which tones are heard 50% of the time. |
| What is the difference in max intensity output between air conduction headphones and the bone vibrator? | AC = 120 dB BC = 50-75 dB |
| What frequency and intensity level does an audiometry test begin with? | 1000Hz at 30dB |
| If a tone is heard, decrease or increase intensity at what interval? | Decrease by 10dB steps. |
| If a tone is NOT heard, decrease or increase intensity at what interval? | Increase by 5dB intervals. |
| When should hearing threshold be recorded? | When patient indicates hearing 50% of the time (2 out of 3 or 4 presentations). |
| What are intermediate frequencies and when should they be tested? | Intermediate frequencies are semi-octaves (half-way between standard testing frequencies). Test them when threshold difference between octaves is 20dB or greater. |
| How do you calculate pure-tone average? | Average of AC thresholds at 500, 1000, and 2000 Hz. |
| What range is normal hearing? | -10 to 15 dB |
| What range is slight hearing loss? | 16 to 20 or 25 dB |
| What range is mild hearing loss? | 20 or 25 to 40 dB |
| What range is moderate hearing loss? | 41 to 55 dB |
| What range is moderate-severe hearing loss? | 56 to 70 dB |
| What range is severe hearing loss? | 71 to 90 dB |
| What range is profound hearing loss? | > 90 dB |
| What is degree of hearing loss based on? | Pure-tone average (PTA) |
| What are three types of hearing loss? | 1. Conductive 2. Sensorineural 3. Mixed |
Created by:
ashea01
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