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25 Cards in this Set
- Front
- Back
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What do audiograms obtain information on? |
An individual's hearing level across different frequency ranges |
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What does HL relate to? |
HL is the unit that relates to the sound pressure level (SPL) assigned to 0 dB HL |
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What is Dynamic Range? |
Dynamic range is the range between the threshold of sensitivity and the threshold of discomfort |
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What is air conduction threshold? |
the pure tone signals are delivered through the air to either left or right ear |
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What is bone conduction threshold? |
pure tones delivered using a bone oscillator placed on the mastoid process, and tests cochlea sensitivity |
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What is the symbol used on an audiogram for right ear air conduction? |
red circle |
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What is the symbol used on an audiogram for left ear air conduction? |
blue X |
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What is the symbol used on an audiogram for right ear bone conduction? |
red < |
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What is the symbol used on an audiogram for left ear bone conduction? |
blue > |
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What is the symbol used on an audiogram for masked right ear air conduction? |
red triangle |
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What is the symbol used on an audiogram for masked left ear air conduction? |
blue square |
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What is the symbol used on an audiogram for masked right ear bone conduction? |
red [ |
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What is the symbol used on an audiogram for masked left ear bone conduction? |
blue ] |
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What are the common frequencies for speech? |
500 Hz, 1000 Hz and 2000 Hz |
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What is normal hearing loss? |
-10 to 15 dB HL |
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What is minimal hearing loss? |
16 to 25 dB HL |
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What is mild hearing loss? |
26 to 40 dB HL |
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What is moderate hearing loss? |
41 to 55 dB HL |
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What is moderately severe hearing loss? |
56 to 70 dB HL |
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What is severe hearing loss? |
71 to 90 dB HL |
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what is profound hearing loss? |
90+ dB HL |
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What does a flat audiogram configuration mean? |
Thresholds are typical within 20 dB of each other across all frequency ranges |
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What does a rising audiogram configuration mean? |
Thresholds for low frequencies are at least 20 dB poorer than high frequencies |
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What does a slopping audiogram configuration mean? |
Thresholds for high frequencies are at least 20 dB poorer than low frequencies |
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What does a trough audiogram configuration mean? |
Hearing thresholds dip in the mid frequencies only |
