Weber and Rinne Tuning fork tests for conductive hearing loss and sensorinueral hearing loss. Also discussing absolute bone conduction (ABC) and Schwabach test for hearing loss. \rbr\rbrConductive hearing loss includes the area from the external ear to the stapes. \rbr\rbrSensorineural hearing loss includes the cochlea and the cranial nerve eight. Using weber and rine tuning fork test you can determine whether the problem is conduction hearing loss or sensorineural hearing loss. \rbr\rbrAir conduction occurs when the sounds waves go through the external ear to the cochlea and the senorineural area. Therefore air conduction tests conduction and sensorineural hearing loss. \rbr\rbrBone conduction the sound waves travel through the mastoid and bypasses the external ear and ivates the cochlea directly. Therefore bone conduction only tests sensorineural. \rbr\rbrRINNE TEST\rbrPlace tuning fork on mastoid until patient can no longer hear. Then place tuning fork next to external auditory meatus and see if the patient can continue to hear. \rbr\rbrNormally air conduction is two times longer than bone conduction. If bone conduction is greater than air conduction then it is called a negative Rinne Test and there is a conduction hearing loss. If air conduction is greater than bone conduction then it is a positive rinne test then the patient is either normal or there is sensorineural hearing loss. \rbr\rbrIf there is severe damage to cochlea than there can be a false positive. \rbr\rbrWEBER TEST\rbrStrike tuning fork on the mideline of fore head.\rbr\rbrNormally the sound will travel to both cochlea equally and the sound will be heard equally (no lateralization). \rbr\rbrIn sensorineural hearing loss the lateralization will go to the good ear. However, if there is conductive hearing loss the sound will lateralize to the bad ear. \rbr\rbrABSOLUTE BONE CONDUCTION (ABC)\rbrComparing patients bone conduction to the bone conduction of the examiner. Tragus must be occluded to rule out any air conduction. Place tuning fork on mastoid and ask when the patient cant hear any long and then place on yourself. If abnormal then there is a sensorineural hearing loss. \rbr\rbrSCHWABACH TEST\rbrSame as absolute bone conduction test but ear is not occluded. If shorter then sensorineural hearing loss. But if it is longer than it is conductive hearing loss.