Bone Conduction Hearing Aids Contrasted with Air Conducting Types
Bone conduction hearing aids can help particular types of hearing loss, and are often of help in the case of children. Others who also benefit in particular from this type of hearing help are those who have non-permanent hearing loss.
This should be caused by physical damage, blockage, infection or eczema. Conventional hearing aids take sounds from outside of the ear, and then amplify this sound and play it back to the inner ear. There are newly developed hearing aids called bone conduction hearing aids, these act very differently to the traditional hearing aids.
Conventional external hearing aids can be usually subdivided into air conduction hearing aids and bone conduction hearing aids.
Air conduction hearing aids require the employment of ear molds, that may be cryptic in hearing loss sufferers with persistent middle ear and ear canal infections, atresia of the outer canal, or an ear canal which can’t accommodate an ear mold.
As a result a new sort of hearing aid has been designed for these people named the bone conduction hearing aid, and these work with an oscillator. It picks up sounds from the outside of the ear and introduces vibratory motions onto the skull.
This is a signal that’s heard by the inner ear. There’s big difference between Bone Conduction Hearing Aids and other models available today on the market. Both take the sound from outside the ear. Nevertheless, a normal model amplifies the sound within the middle ear, in the ear mould. The inner ear then receives the sounds from the ear mold. The Bone Conductor Hearing aid is dissimilar.
It conveys the signal picked up outside of the ear, directly to the oscillator. The oscillator vibrates against the skull that the inner ear recognizes as sound. though the Bone Conduction Hearing aid isn’t as efficient as the other hearing aids available, but it’s great for those whose condition is not suitable for the regular sort of help.
In these patients, bone conduction hearing aids could be an alternative. External bone conduction hearing aids function by broadcasting sound waves thru the bone to the ossicles of the middle ear. The external devices must be closely applied to the temporal bone, with either a steel spring OTT of the head or with the use of a spring-loaded arm on 2 glasses.
In these patients, a bone-anchored device located near the deaf ear works as a transcranial contralateral routing of signal ( CROS ) to transmit sound to the contralateral functional cochlea via bone conduction.
Headbands made from hard materials for bone conduction hearing aids have caused discomfort problems. Queries have been posted online asking whether or not it is possible to buy fabric headbands, and attach the bone conduction help with Velcro. Look for companies that provide such equipment.
Hard headbands can give Problems either due to cosmetics reasons, or pain.
Girls can use butterfly clips both to decorate and to anchor the headband in their hair. Some youngsters use sports headbands. Make a slit on the inside only of one side and run the wire through the headband to a matching slit on the other side, just above the ear.
Also remember the oscillator must immediately contact the skin and must be attached in such a fashion that nothing comes between the oscillator and the skin. Frequently just the fit of the headband will achieve this but if not velcro should be attached to the back of the oscillator.
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