Masking, Tympanometry, Audiogram, Speech Audiometry Report writing
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| When do you mask for Air conduction? | ACTE - IA > or = BC
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| What is cross hearing? | When the sound is heard opposite the test ear
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| What is Interaural attenuation? | loss of energy of a sound as it travels from the test ear to the non-test earl; number of decibels lost in cross hearing
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| What is effective masking? | The minimum amount of noise required to just mask out a signal at a given hearing level
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| What is the symbol for left unmasked air conduction | X
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| What is the symbol for right unmasked air conduction? | O
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| What is the symbol for left masked air conduction? | [] *box
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| What is the symbol for right masked air conduction? | Triangle
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| what is the smbol for right unmasked bone conduction? | <
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| what is the symbol for left unmasked bone conduction? | >
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| What is the symbol for right masked bone conduction? | [
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| what is the symbol for left masked bone conduction? | ]
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| What is the interaural attenuation for headphones? | 40 dB
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| what is the interaural attenuation for earphone inserts? | 50 dB
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| how do you determine starting levels to mask air conduction? | threshold of non-test ear + CF-15 (MEM-5 + saftey factor-10)
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| What do you need a plateu of in order to mark threshold? | tone heard over masking noise
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| when do you need to mask for bone conduction? | when there is a significant air-bone gap in test ear (greater than 10dB)
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| How do you determine starting level for bone conduction masking? | EM = AC non-test ear + CF + OE
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| what is the occlusion effect for 250 Hz? | 20 dB
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| What is the occlusion effect for 500 Hz | 15 dB
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| what is the occlusion effect for 750 Hz | 10 dB
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| what is the occlusion effect for 1000 Hz | 5 dB
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| what pediatric test is used for ages 5 months - 2 years | Visual Reinforcement Audiometry
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| What pediatric test is used for ages 2-4 years | Conditioned play audiometry
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| What test is used for ages greater than 5 years | Standard Audiometry
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| what test is rarely used and what ages does it used for | Tangible Reinforcement Operant Conditioning Audiometry. Ages 3-4
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| what are high frequencies responsible for in speech and what induces it | Consonants, clarity, hearing with background noise. Ageing, noise exposure, ototoxic drugs
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| what are low frequencies responsible for in speecha nd what induces it | volume, trouble with intonation patterns, tend to speak loudly
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| How do you predict SRT values? | PTA - 2 dB
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| what can high frequency mixed or conductive loss indicate? | Canal Collapse
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| What is Normal hearing? | up to 20 dB
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| what is Mild hearing loss? | 25-40 dB
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| What is moderate hearing loss? | 45-60 dB
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| what is severe hearing loss? | 65-90 dB
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| what is profound hearing loss? | above 90 dB
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| What is typical compliance for children | .25 - 1.05 ml
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| What is typical compliance for an adult | 0.3 - 1.7 ml
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| what are the norms of peak pressure? | -200 - 50 daPa
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| What is typiccal Equivalent Ear canal Volume for children? | 0.3 - 0.9 cm3
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| What is typical equivalent ear canal volume for an adult | 0.9 - 2.0
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| What is a type A tympanogram? | all within normative values
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| What is a Type B tympanogram? | Flat tympanogram
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| what are characteristics of a Type B tympanogram? | No pressure peak, no peak compliance
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| What does a type B tympanogram with normal volume indicate? | Fluid in the ear
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| What does a type B tympanogram with high volume mean? | perforation in the eardrum
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| Waht is a Type C tympanogram | negative pressure
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| What does a type C tympanogram indicate? | Retracted eardrum/ ear infections
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| what is the our of norm value of type c tmpanogram | Peak pressure (-)
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| What is a type AD Tympanogram | discontinuous ear drum - too much movement
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| what is the out of norm value of a type AD tympanogram? | Peak compliance - too high
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| what does a type AD tympanogram indicate? | Ossicular disarticulation
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| What is a type AS tympanogram? | Stiff or shallow eardrum - too little movement
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| what is the out of norm value of a type AS tympanogram? | Peak compliance - too low
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| what does a type AS tympanogram indicate? | Otosclerosis
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| What do you do if you see a + pressure? | tell pateint to "pop" their ears and try agian
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| When can you test a reflex? | if there is normal compliance
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| How would you change a tympanometer for an up to 4 month old? | Change tone from 226 HZ to 1000 Hz
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| What is an SRT | Speech recognition Threshold - The lowest level at which 50% of speech is
understood
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| What is the stimuli for SPT | Spondaic words
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| What is the purpose of an SRT? | validity check for PTA
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| What is agreement of SRT vs PTA? | • + 6 dB good agreement
• + 7 to +12 dB fair agreement
• > + 13 dB poor agreement
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| Is the SRT a closed or open set | closed
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