Determining Candidacy for the Cochlear™ Baha® System

Both the Baha Attract and Baha Connect Systems are indicated for conductive hearing loss, mixed hearing loss and single sided sensorineural deafness. The following guidelines may help determine the best system depending on the needs of the patient.

Types of Hearing Loss

Conductive Hearing Loss

  • The conductive component of the hearing loss is > 30 dB. (There is an air-bone gap >/= 30 dB)
  • With a Baha System, very little amplification is required, as the conductive component is bypassed via direct bone conduction.

Many patients with a conductive hearing loss can benefit from the Baha System. The conductive roadblock is completely bypassed as the sound is routed directly to the cochlea via bone conduction. Both the Baha Attract System and the Baha Connect System can provide good audiological outcomes for patients with conductive hearing loss.


Mixed Hearing Loss

  • The conductive component of the hearing loss is > 30 dB. (There is an air-bone gap >/= 30 dB)
  • Mild to moderate sensorineural component to the hearing loss. The greater the air-bone gap, the more the candidate will benefit from Baha System.

For mixed hearing losses, the Baha solution is effective because it bypasses the conductive element and only needs to address the sensorineural hearing loss. Device connection type and sound processor selection will depend on the amount of sensorineural hearing loss.


Single Sided Deafness (SSD)

  • Normal hearing in the good ear. The head shadow effect is overcome, leading to improved speech understanding and 360° sound awareness.

In SSD, the Baha System bypasses the deaf ear entirely and delivers sound directly to the hearing ear’s cochlea. SSD candidates with a large transcranial attenuation or a sensorineural hearing loss developing in the hearing ear may benefit from the additional amplification provided by the Baha Connect System.


Choosing the Right System

Baha Attract System

  • Conductive hearing loss
  • Mild mixed hearing loss
  • SSD with low transcranial attenuation.

Baha Connect System

  • Mixed hearing loss
  • SSD with large transcranial attenuation.
  • Candidates with progressive hearing loss.