Exam 1 Part 6 Flashcards
Explain the aspect ratio of an audiogram
1 in between each line is 20 dB or 1 octave is 20 dB
Making sure equipment works and start of testing
Listening check
Knowing your own hearing thresholds and testing them before testing begins; done at start of the day
Biological calibration
Technician/audiologist checks audiometer thoroughly before testing
Exhaustive calibration
Making sure hair is out of the way of the diaphragm of the speaker
Positioning of transducer
People may have different bone and skin densities; will have to adjust testing to their needs
Subject variability
Plugging 1 ear to make the stimulus sound louder
Occlusion effect
What might the occlusion effect have on an audiogram?
Makes the results look better since it affects lower frequencies
Occlusion effect: __ dB @ 250 Hz
20
Occlusion effect: __ dB @ 500 Hz
15
Occlusion effect: __ dB @ 1000 Hz
5
What are some variables that are specific to bone conduction?
Oscillator, individual differences, placement
Averaging thresholds of pure tone frequencies at 500, 1000, 2000 Hz
Pure tone average
Why do we use 500, 1000, and 2000 Hz in pure tone averaging?
It’s where most of speech frequencies are at
When do we test interoctaves?
When you suspect hearing loss, OSHA rules, 20 dB or greater change between 2 adjacent octave frequences
We test interoctaves at _____ and ____ dB
3000, 6000
True or false: we test at 125 dB
False
True or false: do not test interoctaves during bone conduction testing
True
Why don’t we test bone conduction at 8000 Hz?
Thresholds of BC can never be better than AC because part of the system cannot be worse than the whole system
