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Movement of the stapes on the oval window creates a wave or vibration in the perilymph fluid of the cochlea. Thousands of nerves representing more than 20,000 frequencies are located along the length of the cochlea; these nerves account for the hearing range.
Conductive hearing loss results from anything that decreases the transmission of sound from the outside world to the cochlea.
Differentiation between sensory (cochlear) and neural (cranial nerve VIII) sensorineural hearing loss is important. Lateralization of the sound to one ear indicates a conductive loss on the same side, or a perceptive loss on the other side.
The patient is asked to indicate whether the tone is louder by air conduction or bone conduction.
The combined information from the Weber and Rinne tests will tell you whether a conductive or sensorineural hearing loss is present. If you have conductive hearing loss, bone conduction test is better because the vibrations are traveling through the bone to the cochlea.
Once your physician has determined the cause of your hearing loss, hearing aid may be recommended. This information is collected if you request information from us, participate in a contest or sweepstakes, and sign up to join our email list or request some other service or information from us. Examination should include otoscopic inspection of the auditory canals and tympanic membranes, assessment of auditory acuity in each ear, and Weber and Rinne tests performed with a 512-Hz tuning fork.
When they strike the tympanic membrane, the waves cause it to vibrate, setting off a chain of vibrations along the ossicles (malleus, incus, and stapes) to the membrane of the oval window at the entrance to the cochlea. This fluid movement displaces the hair cells, triggering an action potential and causing a nerve in the cochlea to fire to the brain. It occurs after damage to the inner ear (hair cell destruction in the cochlea) or vestibulocochlear nerve (cranial nerve VIII).
Evaluating hearing with a tuning fork can be a useful clinical screening tool to differentiate between conductive and sensorineural hearing loss. The stem of a vibrating tuning fork is placed on the head in the midline, and the patient is asked whether the tone is heard in both ears or in one ear better than in the other.


When neurosensory hearing is intact bilaterally, the sound will lateralize to the side of conductive loss, which loses the masking effect of background noises. If there is conductive hearing loss of right ear, the vibration of the tuning fork is heard better in the right ear. If there is sensorineural hearing loss of right ear, the vibration of the tuning fork is heard better in the left ear. A Rinne test compares the ability to hear by air conduction with the ability to hear by bone conduction.
Normally and in sensorineural hearing loss, the tone of the vibrating tuning fork is heard louder by air conduction than by bone conduction. However, these tests are associated with significant false-positive and -negative responses and therefore should be used only as screening tools and not as a definitive evaluation of auditory function. An ear with sensorineural hearing loss, the air conduction is the best test of the tuning fork because sound is transmitted efficiently through the healthy apparatus of the middle ear than through bone.
Infection can be treated with antibiotics, although sometimes the infection must be drained and the pressure relieved by myringotomy, a tiny opening is made in the eardrum. It produces periods of vertigo, a spinning sensation, dizziness, nausea, vomiting, and fluctuating hearing loss, also noise in the ear.This disease can be dramatic and disabling. The information collected is internally reviewed, used to improve the content of our website, notify our visitors of updates, and respond to visitor inquiries. Auditory acuity can be tested crudely by rubbing thumb and forefinger together approximately 2 in from each ear.
The location of the vibration in the cochlea correlates with the frequency of the original pitch.
By comparing the threshold of hearing by air conduction with that elicited by bone conduction with a 512-Hz tuning fork, one can infer the site of the lesion responsible for hearing loss. As a general rule, a 5-dB difference in hearing between the two ears is required for lateralization (see figure below).
The vibrating tuning fork is held near the opening of the external auditory canal, and then the stem is placed on the mastoid process. However, with a 30-dB or greater conductive hearing loss, the bone-conduction stimulus is perceived as louder than the air-conduction stimulus.


If the patient complains of hearing loss or cannot hear the finger rub, the type of the hearing deficit should be determined. The Rinne and Weber tuning fork tests are used widely both to differentiate conductive from sensorineural hearing losses and to confirm the audiologic evaluation results.
An abnormal result is when the patient can hear the tuning fork tone in one ear more than the other. Go to chemobrainIn the weber test which is used to diagnose one side of hearing loss, the vibrating tuning fork is held against the middle of your forehead. Rinne-negative test is abnormal and means that bone conduction is greater than air conduction. If you are a victim of conductive hearing loss, you hear the sound better in the hearing loss ear, because the ear is not distracted by environmental sounds, which means the noise is barely heard due to the abnormalities in the outer and middle ear.It is possible that your physician will order a more trained physician namely a specialist who conduct audiometric testing. The symptoms are vertigo, a spinning sensation, loss of balance, nausea, vomiting, involuntary movements of the eyes, and hearing loss in one ear.The symptoms do not last more than a few days and there are treatments that help. The most successful operations are destructive, which means they purposely change the structures in the ear to bring deafness to prevent vertigo.This type of surgery is usually used on an individual who experience severe dizziness and have little or no hearing in the affected ear. Middle ear infection is also called otitis media.This infection is very common in children, it can cause severe pain in the affected ear.
Impedance testing measures your eardrum's ability to reflect sound waves and can indicate whether a middle ear problem is causing hearing loss. The surgeon cuts the nerve that carries the body's balance signal from the inner ear to the brain.A newer procedure called an ENDOLYMPHATIC SHUNT a small hole is produce in the inner ear to drain out the excess fluid. Another procedure is to install the antibiotics gentcomicin or streptomycin into the middle ear through the eardrum; these drugs selectively destroys the balance organ and the chaotic signal it send to the brain while preserving hearing.




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