A medical illustration shows a man with the blunt end of a tuning fork pressed to the center of his forehead. The man is being tested for which of the following?
a. Sensorineural hearing loss
b. Presbycusis
c. Tinnitus
d. Unilateral conductive hearing loss
D
Weber's test, in which a vibrating tuning fork is placed on the center of the forehead, detects the differences in hearing between one ear and the other caused by poor sound conduction. During testing, the patient is asked to describe the sensation felt when the tuning fork is activated and then placed on the forehead. If the patient's hearing by conduction is intact, then he or she will feel vibrations conducted through the bones of the skull from the tuning fork. Weber's test with the tuning fork is used to detect conductive hearing loss.
Presbycusis affects both ears and has a sensorineural origin. The tuning fork test is used to detect conductive hearing loss in one ear. Tinnitus is a hearing sensation not caused by an actual sound. The tuning fork test is used to detect hearing loss caused by poor sound conduction.
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