i cannot figure out b or c ...... because i. dont really understand how the ear

Question

i cannot figure out b or c ...... because i. dont really understand how the ear works.

Problem Set 7.2: Clinical Investigation of Hearing Wober's Test for Conduction Deafness a What both the left and right ears? was ts few equally loud In both ears? tf not, in wile was the sound louder? b. How did using an earplug alter the results of the Webers test? iWhat type of danage to the eat does the earplug simulate? Explain youa results. c. While you are conducting the Weber's test, a bent reports that the sound seems louder in her right car, What are the two possible explanations for this result? Explain.

Explanation / Answer

b)The auditory system can be divided into three, the outer ear consisting of the pinna, ear canal, and ear drum or tympanic membrane which transmits sound vibration to middle ear consisting incus, malleus, stapes and the inner ear consisting  cochlea with its internal basilar membrane and attached cochlear nerve. Weber test can detect middle ear hearing loss( unilateral (one-sided) conductive hearing loss ) as well as inner ear hearing loss(unilateral sensorineural hearing loss).

Ear plug are inserted into ear canal(ear canal connects the outer ear to middle ear). insertion of ear plug will simulate the middle ear hearing loss, as the sound vibrations collected by the outer ear couldn't get transmitted to middle ear.

c)In weber test normal patient reports the sound heard equally in both sides. In an affected patient, if the right ear is defective and the patient hears the Weber tuning fork louder in right ear, the finding indicates a conductive hearing loss in the defective ear. In an affected patient, if the right ear is normal and the right ear itself hears the tuning fork sound better, there is sensorineural hearing loss on the other (defective) ear.

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