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23 Cards in this Set
- Front
- Back
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Intensity |
● amount of energy per unit volume of air
● perceptual counterpart = loudness
● Measured on logarithmic scale
● dB |
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Frequency |
● # of compressions & rarefactions in a given time period
● perceptual counterpart = pitch
● measured by # of complete cycles within period of time
● Hz |
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Amplitude |
● the height of a sound wave |
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Pure Tones |
● a sound consisting of only 1 frequency ● not found in nature |
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Harmonics |
● equal multiples of the freq. of a pure tone |
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Formants |
●peaks of energy @ different harmonics ●equal multiples of fundamental frequency |
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Auditory Threshold |
● level of a sound that is so soft it can just barely be perceived about 50% of the time it is presented |
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Audiogram Symbols |
● Right Ear ↳ Air : Red circle ↳ Bone : Red <
● Left Ear ↳ Air: Blue X ↳ Bone: Blue > determined by American National standards lnsr & ASHA |
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Audiogram Ranges |
● Intensity: -10 → 110 dB
● Frequency: 125 → 8,000 Hz ↳ bone : 250→ 4000 Hz |
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Flat Loss Audiogram |
● thresholds for intervals do not exceed 10 → 15 dB variability |
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Sloping Audiogram |
● hearing above 2,000 Hz is abnormal |
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Cookie Bite Audiogram |
● (Near-)normal hearing in the low & high frequencies . Mid frequency loss |
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Left Corner Audiogram |
● thresholds @ or near limits of audiometer |
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what does a sensorsineural audiogram look like ? |
no air-bone gap & both are abnormal |
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Speech Reception Threshold |
lowest dB level @ which listener can correctly repeat 50% spondees |
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What is 1st type of site-of-lesion testing? |
● Bone Conduction Testing |
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there a good relationship between pure tone thresholds and... |
speech thresholds for spondees |
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Vertical Axis |
● Intensity dB As line goes down, hearing goes up |
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Static compliance |
● measures opposition to energy flow into the middle ear & admittance of sound to the middle ear ● as one increases the other decreases |
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tympanometry |
the measurement of compliance from tymp Membrane as air pressure is placed against it |
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Acoustic Reflex |
Contraction of tensor tempani & stapedus muscles in response to intense sounds (85 dB above threshold in one ear) |
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Auditory Evoked Potentials |
● objective measures of Auditory function & site of lesion diagnosis ●pt. given earphones or bone conduction transducers, and electrode to measure electrical activity in auditory system evoked my sound stimuli |
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Otoacoustic Emissions |
● sounds produced by cochlea
● spontaneous or elicited
● useful for testing neonates & those who feign hearing issues
● individuals w/conductive HL will not exhibit OAEs nor will individuals with cochlear HL that is moderate + |
