Bone Conduction Implant for Single-Sided Deafness.

Hear the Other Side.

Single-sided deafness can make everyday activities more difficult. Business meetings, crossing the street, driving a car and enjoying a meal in a busy restaurant can be hard work and very stressful.

Creative coping mechanisms become a regular occurrence – sitting on a certain side of the table or room, telling people to speak into your ‘good ear,’ avoiding busy restaurants or family gatherings and asking your colleagues to constantly repeat themselves while at the office or in meetings.

It can be exhausting.

Debra B., Baha recipient

Understanding Single-Sided Deafness.

Single-sided deafness (SSD) occurs when you have little to no hearing in one ear and normal hearing in the other. It can happen at birth, suddenly or gradually over time.

Some of the most common causes of SSD include:

  • Acoustic Neuroma—due to the surgical removal of benign tumor(s) developing on the nerve that connects the ear to the brain
  • Sudden Hearing Loss—due to viral infections; Ménière's disease; adverse reaction to medications; head or ear injuries; and many other unknown reasons
  • Malformation at birth or missing inner ear or cochlea

The importance of hearing with both ears.

Ears are a Team.

Hearing with two ears (called binaural hearing) provides clear advantages.

Ears work as a team. Hearing and actively engaging in life is easier when using both ears. Hearing with two ears allows you to identify sounds both near and far, as well as those that occur 360 degrees around your head.¹ With two ears, you can better understand speech and hear more clearly. You can also better determine where a sound is coming from and hear better in noise.

If one ear is taken out of the equation, it may become difficult to:

Avoid the Head Shadow Effect


Sounds that originate from your bad side will fall in the shadow of your head, so when they finally reach your good ear, it may be more difficult to hear and understand them clearly, especially in noisy environments.2 This is especially true for higher-frequency sounds. Because they have shorter wavelengths, it is easier for them to be reflected by the head.²

Head Shadow Effect Diagram

Understand Speech in Noise


Because consonants are higher-frequency sounds that contain much of the meaning of speech, the head-shadow effect makes it difficult for people with SSD to understand speech in the presence of background noise.²

Locate Sound


A limited ability to discern the direction of sound is more than inconvenient – it can be dangerous. Crossing a busy street, driving through traffic or not knowing where your child is when they call your name at the playground may be very unsettling.

The Cochlear™ Baha® System for SSD

The Cochlear™ Baha® System is an implantable hearing solution that works by picking up sounds on your deaf side, converting them into sound vibrations and transferring them to your good, working ear through the skull bone.

The Cochlear Baha System

The Baha System helps provide 360-degree sound awareness, improving speech understanding in noise.³

How the Baha System is different from …

CROS Hearing Aids


  • The Baha System is a discreet solution worn on one side, while CROS hearing aids require users to wear devices on both ears.
  • The Baha System is an implantable hearing solution designed to use your body’s natural ability to conduct sound through bone conduction.
  • CROS hearing aids are conventional hearing aids placed behind, or inside, each ear.
  • The Baha System bypasses the outer and middle ear and sends clearer, more crisp sound directly to your inner ear.4
  • CROS hearing aids work by picking up sound on your ‘bad side’ and transmitting it via a hard wire or a wireless signal to your normal hearing ear.
  • Studies show that the Baha System provides better speech understanding in noise than CROS hearing aids.5

Leaving Your Hearing Loss Untreated


  • Research and decades of experience demonstrate the benefits of the Baha System compared to leaving your hearing loss untreated.6-10   With it, you may be able to:
    • Hear better, even in noisy situations
    • Enjoy a clean, natural sound, because bypassing your problem reduces the amplification that's needed
    • Hear sounds as if they are coming from both sides
    • Become more aware of your surroundings, increasing your ability to hear important sounds
    • No longer need to keep turning your ’good’ ear toward people when they speak

Baha Recipient Success Stories.

You are not alone. In fact, each year approximately 60,000 Americans find themselves exactly where you are right now.11 We hear so many stories from people who struggle with hearing loss in one ear. Luckily, we’ve also heard stories from those who overcame it.

Aaron B., Sudden Hearing Loss

Aaron suddenly lost his hearing in his right ear overnight. Not only did he lose his hearing but he also lost his connection to one of his most favorite things in the world- nature. His hearing loss changed his personality and even made him withdrawal from the ones he loved most. After talking with his audiologist, he knew the Baha 5 SuperPower is exactly what he needed to have 360 degrees of sound again.

How the Baha System Works

Debra B., Gradual Hearing Loss From Tumor

Debra was diagnosed with a cholesteatoma that was life changing. The invasive tumor left her totally deaf in her right ear, leaving her without sound and often times missing out on conversations that were happening right in front of her. Thanks to the Baha 5 System, Debra is no longer missing out on any conversations and is enjoying richer relationships with family and friends.

How the Baha System Works


  1. Wazen JJ, Spitzer JB, Ghossaini SN, Fayad JN, Niparko JK, Cox K, et al. Transcranial contralateral cochlear stimulation in unilateral deafness. Otolaryngology-Head & Neck Surgery 2003;129(3):248-54.
  2. Weaver, J. "Single-Sided Deafness: Causes, and Solutions, Take Many Forms." Hearing Journal 68.3 (2015): 20-24. Web. 28 Apr. 2017.,_and_Solutions,.1.aspx
  3. Dun, C.A.J. , de Wolf, M.J.F , Wigren, S., Eeg Olofsson, M., Granstrom, G., Green, K., Flynn, M.C., Stalfors, J., Rothera, M., Mylanus, E.A.M., & Cremers, C.W.R.J. (2010) Development and Multi centre Clinical Investigation of a Novel Baha Implant System. Technical and 6 Month Data. Paper presented at CI 2010, Stockholm, Sweden.
  4. Gustafsson J. BCDrive performance vs. conventional bone conduction transducer. Cochlear Bone Anchored Solutions AB, 629908, 2015.
  5. Niparko JK, Cox KM, Lustig LR. Comparison of the bone-anchored hearing aid implantable hearing device with contralateral routing of offside signal amplification in the rehabilitation of unilateral deafness. Otology & Neurotology, 2003 Jan;24(1):73-78.
  6. Flynn MC, Sadeghi A, Halvarsson G. Baha solutions for patients with severe mixed hearing loss. Cochlear Implants Int 2009;10 Suppl 1:43-7.Ð_
  7. Hol MK, Snik AF, Mylanus EA, Cremers CW. Long-term results of bone-anchored hearing aid recipients who had previously used air-conduction hearing aids. Arch Otolaryngol Head Neck Surg 2005 Apr;131(4):321-5.
  8. Watson GJ, Silva S, Lawless T, Harling JL, Sheehan PZ. Bone anchored hearing aids: a preliminary assessment of the impact on outpatients and cost when rehabilitating hearing in chronic suppurative otitis media. Clin Otolaryngol 2008;33:338–342.
  9. Snik AF, Mylanus EA, Proops DW, Wolfaardt J, Hodgetts WA, Somers T, Niparko JK, Wazen JJ, Sterkers O, Cremers CW, Tjellström A. Consensus statements on the Baha system: Where do we stand at present? Ann Otol Rhinol Laryngol 2005 Dec;114(12) Suppl 195:1-12.
  10. Lin LM, Bowditch S, Anderson MJ, May B, Cox KM, Niparko K. “Amplification in the rehabilitation of unilateral deafness: speech in noise and directional hearing effects with bone-anchored hearing and contralateral routing of signal amplification.” Otology & Neurotology. 2006;27(2):172-82.
  11. “Single-Sided Deafness-SSD.” Accessed April 28, 2017.