SPA 4302 Lecture Notes - Lecture 6: Hearing Aid, Magnetic Resonance Imaging, Audiogram
27 Feb 2018
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Why do we need to mask: to ensure ear specific information, to ensure accurate hearing pathway information, to ensure correct diagnosis and treatment is possible. Key masking terms: cross hearing (transcranial hearing, the detection of a stimulus sound in the non-test ear. Interaural attenuation (ia: the reduction of sound as it crosses the head from one ear to the other, under masking. Air conduction- masked: the squares represent the masked threshold, can leave the original xs there or re-write audiogram, hearing loss is now in the profound range. Implications for the patient: may not benefit from a hearing aid. Insert earphones used: no need for ac masking. Is there an air-bone gap of >10 db: no in the right, unmasked bc threshold for right ear , yes in the left. ] denotes masked bone conduction threshold: hearing loss is conductive.
