Von Bekesy is credited with the discovery that at the level of the cochlea, phase shifted bone-conduction signals cancel out air conduction signals.
12.
Cartilage conduction can be particularly useful for patients with disorders of the outer ear, including aural atresia, where conventional air conduction hearing aids cannot be used.
13.
He reasoned that if a person hears a sound for a longer period of time through bone conduction than through air conduction, a disease is present somewhere in the conduction apparatus.
14.
"' Bone-conduction auditory brainstem response ( BCABR ) "'are similar to air conduction auditory brainstem responses, with the main difference being that the signal is transmitted via bone-conduction instead of air.
15.
The Rinne test is a hearing test conducted with a tuning fork, and is used to test and compare a patients'hearing via air conduction ( normal process ) or by way of bone conduction ( sound to the inner ear through the mastoid ).
16.
For example, if the Rinne test shows that air conduction ( AC ) is greater than bone conduction ( BC ) in both ears and the Weber test lateralizes to a particular ear, then there is sensorineural hearing loss in the opposite ( weaker ) ear.
17.
Mauldin & Jerger " ( 1979 ) " found that for adults, the " Wave V " latencies derived from bone-conduction ABR are approximately " 0.5 ms " longer than the same intensity level of air conduction.
18.
Therefore, some prefer to avoid using the term'positive'or'negative', and simply state if the test was normal or abnormal e . g .'Rinnes test was abnormal in the right ear, with bone conduction greater than air conduction '.
19.
Binaural-beat perception originates in the inferior colliculus of the midbrain and the superior olivary complex of the brainstem, where EEG changes did not occur when the standard electromagnetic headphones were replaced by air conduction headphones, which were connected to a remote transducer by rubber tubes.
20.
The maximum output for bone is around 50 dB nHL and should look similar to the 50 dB HL response of air conduction for people with normal hearing or with a mild SNHL . With conductive hearing losses, the latencies for air are shifted when compared to the latencies of bone-conduction.
