Typically, the concept of hearing aids invokes the thought of traditional devices that boost sound through the canal of the ear. But for individuals with certain kinds of hearing loss, especially those coping with persistent ear problems or single-sided deafness, a distinct kind of technology could provide better quality and comfort: bone conduction hearing devices.
How Bone Conduction Hearing Devices Work
Bone conduction hearing devices work by bypassing the outer and middle ear. Instead of sending sound through the air, they transfer vibrations through the bones of the skull to the inner ear (cochlea), where the sound is processed. This allows sound to get to the auditory nerve even if there is an obstruction or injury in the ear canal. Consider this example: When you put your hands over your ears and still manage to hear the sound of your own voice when talking, that’s an illustration of bone conduction at work.
Bone Conduction vs. Conventional Hearing Aids
Traditional hearing aids boost sound and direct it through the ear canal. This strategy is particularly helpful for individuals who have had damage to the inner ear or the nerve responsible for transmitting sound, causing sensorineural hearing loss. But if the issue is with the outer or middle ear, due to infection, fluid buildup, or structural issues, conventional hearing aids might not be effective or comfortable. Bone conduction hearing devices are typically a better solution in these cases because they bypass the problem areas and deliver sound directly to your cochlea.
Bone Conduction Candidates
Situations where bone conduction devices are appropriate:
- Sound waves are unable to pass through the outer or middle ear, leading to conductive hearing loss.
- Persistent ear infections or drainage issues, where traditional hearing aids could aggravate the condition.
- Individuals with flawed ear canals or the absence of outer ears, who may not qualify for conventional devices.
- A condition known as unilateral deafness, where a person experiences significant or total hearing loss in one ear. These devices offer a non-intrusive option that is typically more comfortable, especially for people, both young and old, who experience frequent ear issues.
Options that include implantable and non-implantable techniques:
There are two main types of bone conduction hearing devices:
- Non-implantable (worn externally): These are usually kept in place with a headband, softband, or sticky pad. They are perfect for kids, those trying out bone conduction for the first time, or people who are not prepared for surgery.
- Implantable (surgically installed): These devices include a small implant under the skin that connects to an external sound processor. They usually provide more robust performance and stability for long-term users. A professional assessment by an audiologist or ENT specialist will determine the most appropriate option for you, taking into account your age, individual anatomy, and personal hearing objectives.
Key Benefits of Bone Conduction Hearing Devices
- Suitable for sensitive ears – does not require insertion into the ear canal
- Clear sound quality, even with chronic ear problems
- Ideal for people with distinct physical attributes – this option is particularly helpful for individuals with congenital conditions impacting the outer ear or other physiological variations.
- Enhanced communication is especially beneficial in instructional settings, professional environments, or loud surroundings
If you or your child has difficulty hearing in one or both ears, particularly because of ongoing infections or problems with sound transmission, it may be helpful to think about bone conduction hearing devices.
Book an appointment with an audiologist today to get further information.
Sources: https://www.dukehealth.org/treatments/ear-nose-and-throat/bone-conduction-hearing-aid https://www.hopkinsmedicine.org/health/treatment-tests-and-therapies/baha–the-implantable- hearing-device https://www.ndcs.org.uk/advice-and-support/all-advice-and-support-topics/hearing-aids- implants-and-assistive-technology/ hearing-aids-and-implants/ bone-conduction-devices https://my.clevelandclinic.org/health/treatments/14794-bone-anchored-auditory-implant
