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Single-sided deafness or unilateral hearing loss occurs when a person has normal or near-normal hearing in one ear but experiences little to no hearing in the other.
This condition affects the ability to locate sounds, understand speech in noisy environments, and maintain auditory balance.
People with one ear hearing loss often struggle to determine where sounds originate. For instance, hearing someone call your name in a crowd can become confusing when you can’t tell which direction the sound came from. Moreover, the “good” ear ends up working harder to process all the incoming sounds, leading to fatigue and reduced listening comfort.
Common causes of unilateral hearing loss include:
Single-sided hearing loss doesn’t just affect hearing; it impacts daily life in ways most people don’t realise. Everyday activities—watching TV, attending meetings, driving, or even dining out—can become frustrating.
Some of the main challenges include:
Thankfully, technology has advanced significantly, and solutions like the CROS and BiCROS hearing systems can restore balance and clarity.
A CROS (Contralateral Routing of Signal) hearing aid is specifically designed for people with single-sided deafness.
It works by picking up sounds from the non-hearing side and wirelessly transmitting them to the better-hearing ear. This way, users can perceive sounds coming from both directions—even if one ear doesn’t function.
For instance, if someone speaks to you from your deaf side, the CROS hearing aid captures their voice and sends it to your good ear, ensuring you don’t miss out on important words.
At The Hearing Centre Singapore, our audiologists fit and program CROS hearing aids from top global brands like:
Each brand offers innovative wireless connectivity, sleek designs, and natural sound quality.
For individuals who have hearing loss in both ears—but one ear is significantly worse than the other—a BiCROS hearing aid system is recommended. This technology not only transmits sound from the poorer ear to the better one (like a CROS aid) but also amplifies the sound in the better ear to enhance overall hearing.
In simpler terms:
Modern advanced hearing solutions go far beyond traditional amplification.
Depending on the severity of your hearing loss, lifestyle, and ear health, our audiologists may recommend one of the following options:
Each of these technologies is designed to restore directional awareness and make communication effortless again.
The first step toward treatment is accurate diagnosis.
Audiologists at The Hearing Centre Singapore conduct detailed tests to assess the level and type of hearing loss.
Our test options include:
After evaluation, your audiologist will recommend whether a CROS, BiCROS, or implant-based solution is best suited for your needs.
The biggest benefit of using hearing aids for single-sided deafness is the restoration of spatial awareness.
Users often describe the experience as “rediscovering balance in sound.” Instead of missing conversations or turning their heads constantly, they enjoy effortless listening in all directions.
Everyday situations where these systems make a difference include:
These systems help restore confidence, reduce fatigue, and improve social participation.
Choosing the right hearing aid is only the first step; proper fitting and maintenance are equally important.
Regular maintenance ensures:
Every case of single-sided deafness is unique. That’s why The Hearing Centre Singapore focuses on personalised solutions.
Our audiologists consider factors such as:
Whether you prefer discreet in-the-ear models or behind-the-ear styles with Bluetooth connectivity, we tailor solutions to your lifestyle.
Feature | CROS System | BiCROS System |
Hearing in the better ear | Normal | Partial hearing loss |
Sound transmission | From the non-hearing side to the better ear | From the non-hearing side + amplification in the better ear |
Best for | One-sided total deafness | One deaf ear and mild-moderate hearing loss in the other |
Key benefit | Directional sound restoration | Balanced amplification and spatial awareness |
At The Hearing Centre, our expert audiologists perform thorough evaluations before recommending the most effective hearing aid system for your needs.
The latest CROS hearing aids are small, wireless, and intelligent. They automatically adjust to the listening environment and deliver natural sound quality without distortion.
Brands such as Phonak, Signia, Starkey, and ReSound are leaders in this space, known for innovation and superior sound clarity.
For individuals with total hearing loss in one ear where traditional or CROS hearing aids provide limited benefit, cochlear implants offer an advanced alternative.
These medical devices bypass damaged hair cells in the inner ear and directly stimulate the hearing nerve.
Even the most advanced device requires regular maintenance to stay effective. Follow these care practices to keep your hearing aid in optimal condition:
For repairs and adjustments, visit The Hearing Centre’s service department. Our experts ensure your devices continue to perform reliably.
With over 20 years of experience, The Hearing Centre Singapore has been a trusted name in hearing care.
We combine advanced technology, expert audiologists, and personalised service to deliver the best possible outcomes for every patient.
Our services include:
We believe hearing is more than a sense—it’s a connection to life itself.
Living with single-sided deafness doesn’t mean living in silence.
With today’s advanced hearing solutions like CROS hearing aids, BiCROS systems, and cochlear implants, individuals with unilateral hearing loss can enjoy clear, balanced, and natural hearing again.
At The Hearing Centre Singapore, our team of expert audiologists provides comprehensive evaluation, customised fittings, and long-term hearing care. Whether you have one ear hearing loss or complete deafness on one side, we offer effective solutions to help you reconnect with the world of sound.
Rediscover the joy of balanced hearing—because every sound deserves to be heard.
Single-sided deafness refers to hearing loss in one ear while the other ear maintains normal or near-normal hearing.
In regular hearing loss, both ears are affected, while in SSD, only one ear has significant hearing impairment.
A CROS hearing aid transmits sounds from the deaf ear to the hearing ear, allowing the user to hear sounds from all directions.
People with one completely deaf ear and partial hearing in the other ear can benefit from a BiCROS system.
They do not restore natural hearing but improve sound perception, direction, and clarity, creating a balanced hearing experience.
Most users adapt within a few weeks with regular use and follow-up support from their audiologist.
Yes, modern CROS devices are lightweight, wireless, and designed for comfort, even with long hours of use.
Causes include viral infections, trauma, acoustic neuroma, sudden hearing loss, or congenital conditions.
Yes. A professional hearing test helps determine your hearing thresholds and the most suitable device.
In some cases, surgical options like bone conduction or cochlear implants may be considered, depending on the cause and severity.
