Resource | 16.06.2023 | By Imran Mulla

6.2. Bone conduction hearing devices (BCHD)


Section 3.9 discussed the assessment process for obtaining bone conduction hearing implants. This section will look in more detail at the technology itself.

A bone conduction hearing device (BCHD) transmits sound directly through the skull bone to the cochlea, bypassing the outer and middle ear cavity.

BCHDs can be fitted when there is a purely conductive hearing loss, eg glue ear, long-term middle ear problems, or when behind-the-ear (BTE) HAs are not appropriate, eg microtia, atresia, or for single-sided deafness (SSD).

A BCHD can be surgically implanted.

However, there are other ways for BCHDs to be worn:

  • on a softband, eg

The Ponto Softband – enter the world of sound | Oticon Medical

  • on a hardband, eg

Cochlear™ Baha® Start | Baha SoundArc | Cochlear

  • on a sticky pad, eg

ADHEAR Bone Conduction System (


How a BCHD works

Bone conduction hearing implant (MED-EL)


Bone conduction hearing aid (non-surgical) (MED-EL)


Baha (Cochlear)


A BCHD (not implanted) gently vibrates the skull bone. The microphones on the sound processor (worn behind the ear) pick up sounds and convert these sounds to vibrations, which are carried through the skull bone to the inner ear.

Bone conduction hearing implants have two parts: a titanium bone implant and an external sound processor. The external microphone and sound processor of the bone-anchored device picks up sounds and converts them into vibrations to the embedded implant. In turn, the implant vibrates the surrounding bone, which sets up sound waves in the inner ear that stimulate the hair cells and result in the firing of the auditory nerve.


Parts of the device

  • Sound processor
  • Abutment (if bone anchored)
  • Implanted magnet (if a magnetic retention)
  • Osseointegrated implant


Makes and models available in the UK


Cochlear: Baha, Osia

Oticon Medical: Ponto

BHM: Contact Mini


Considerations for QToDs

Checking the device

  • Cochlear Baha test rod

Cochlear Baha test rod | Connevans

  • Connevans BCHI listener

Baha 22 listener for Baha & Ponto | Connevans

  • B & H Test rod

Baha | Rubi Audiology Ltd

Shop | Rubi Audiology



Radio aids

It is not possible to plug a receiver into a BCHD. A receiver may be plugged into the remote microphone/streamer and the radio aid transmission can be streamed to the BCHD.


Cochlear Baha 5 | Connevans

Baha® 5 Hearing Device Pairing Manual with Mini Mic | Cochlear

Baha® 5 Hearing Device Pairing Manual with Mini Mic | Cochlear



How to pair Oticon Ponto to Edu Mic:

Enjoy sound from all your favourite devices | Oticon Medical

Oticon EduMic classroom remote microphone for Oticon Opn, Engage, More, Xceed & Siya hearing aids, Ponto 4 & Ponto 5 | Connevans



ADHEAR Connectivity (

SAMBA Connectivity (

SAMBA 2 Optional Accessories (

Support and help for SAMBA 2 GO ( Streaming with SAMBA 2 GO

Support and help for SAMBA 2 GO ( Using remote microphones – How to connect SAMBA 2 GO to FM receiver

(Disclaimer – video shows a Phonak MLXi and Phonak Roger Pen – Note MLXI is not compatible with Phonak Roger Pen.)


Bluetooth pairing


Connect hearing aids to your device – Android accessibility help (



Use Made for iPhone hearing devices – Apple Support (UK)



Hearing accessibility |

Accessibility features for Fire TV – Amazon customer service – there is a video on this link demonstrating how to pair hearing devices with Amazon Fire TV


Further reading

Bone conduction hearing aids | Johns Hopkins Medicine


Next pages in this section

6.3 Cochlear implants

6.4 Assistive Listening Technology (ALT) – radio aids and proprietary remote microphone systems

6.5 Soundfield systems

6.6 Test box measures

6.7 Other hearing technologies

Previous page in this section

6.1 Hearing aids

Other sections