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1 Audiometry Protocol.docx - THRESHOLD AUDIOGRAM PROTOCOL -...

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THRESHOLD AUDIOGRAM PROTOCOL- The exercise should be performed in aQUIETroomSTEP 1 - PREPARING THE SUBJECT FOR A TEST1.Put the subject at ease.2.The subject should be seated approximately 1m from the instrument, facing away from it.3.Make sure the subject understands the task and what they will hear.4.Use the following instructions:“I am going to place these headphones over your ears. You will hear tones or beeping sounds which may beloud or soft. Whenever you hear, or think you hear, one of these tones, raise your hand. Lower your hand whenyou no longer hear the sound.”“Remember, raise your hand when you hear the tone and lower your hand when you do not.”STEP 2 - PLACE HEADPHONE ON SUBJECT1.Eliminate all obstructions between the ear phones and subject.2.Place the headband solidly on the crown of the subject’s head.3.Center the earphones carefully over both ears.STEP 3 - CONDUCTING THE THRESHOLD TEST1. Familiarize the subject with the test:a)Start with theRIGHTear.b)Demonstrate a tone for the subject using 1000 Hz at 50 dB HL (i.e.PUSH
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Term
Fall
Professor
Doctor Geeta Kurhade
Tags

Unformatted text preview: b) Demonstrate a tone for the subject using 1000 Hz at 50 dB HL (i.e. PUSH the Stimulus button for 1-2s). 2. Determine the threshold:c) Present the tone at 50 dB d) Present the tone for 1 or 2 seconds (The time between the tones should vary , but should not be shorterthan the test tone) e) Adjust the frequency to 125 Hz f) Present the tone at 50 dB g) With each response, decrease the tone 10 dB until the first “No Response” occurs. h) When the subject does not respond to a tone, increase the intensity by 5 dB until a response occurs. i) Continue with DOWN 10 dB , UP 5 dB until the threshold is reached. NOTE: Threshold = minimum dial setting at which a response has occurred 2 times on an ascending scale. j) Record the threshold on the audiogram.k) Change the frequency in ascending order (e.g. 250 Hz) l) Repeat steps f) to k) for the following frequencies: 250 Hz, 500 Hz, 750 Hz, 1000 Hz, 1500 Hz, 2000 Hz, 3000 Hz, 4000 Hz, 6000 Hz and 8000 Hz...
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