Bone Anchored Hearing Aid (BAHA)
What Is a Bone-Anchored Hearing Aid and How Does It Work?
A bone-anchored hearing aid (BAHA) is a specialized hearing device designed for people who cannot benefit from traditional hearing aids due to problems in the outer or middle ear, or for those with single-sided deafness. Instead of sending sound through the ear canal, a BAHA uses the natural ability of bone to conduct sound directly to the inner ear.
How a Bone-Anchored Hearing Aid Works
A BAHA system has two main parts:
- A small titanium implant placed in the bone behind the ear.
- An external sound processor that attaches to the implant or connects through the skin with a magnet.
Here’s how it functions:
- Sound collection: The sound processor picks up sound vibrations from the environment.
- Bone conduction: These vibrations are transferred through the implant into the skull bone.
- Inner ear stimulation: The vibrations reach the inner ear (cochlea), where they are converted into nerve signals
- Brain interpretation: The brain processes these signals as sound—bypassing any damaged parts of the outer or middle ear.
Who Can Benefit From a BAHA?
Bone-anchored hearing aids are commonly recommended for individuals with:
- Conductive or mixed hearing loss
- Chronic ear infections that prevent use of regular hearing aids
- Congenital ear canal or middle-ear abnormalities
- Single-sided deafness (SSD)
Key Advantages
- Clearer sound quality for qualifying patients
- Reduced feedback compared with traditional hearing aids
- Bypasses damaged ear structures
- Comfortable and discreet design