I have known people who have hearing in only one ear or have a severe hearing loss in one ear that leaves them with no understanding of speech on that side. 

People with hearing in only one ear can’t hear in noisy situations, meetings, in the car and restaurants when people are not positioned on the side of their good ear.  

It’s very frustrating for both you and the people trying to talk to you!

CROS and BiCROS that can help can help in these cases. Let me explain how it works.

CROS hearing aids

A CROS, short for “contralateral routing of signals”, is used for people who have one ear with no hearing and normal hearing in the other ear. 

Two small behind-the-ear hearing aids are worn. On the ear with poor or no hearing, you wear a transmitter. The transmitter sends sounds from that side to the normal hearing side. 

What that means is, when someone comes up to your poor side and whispers to you, you will hear it through the hearing aid on your good ear!

The sounds won’t be too loud, because the CROS doesn’t amplify the sounds and voices, it just transfers sound from the poor side to the good side. 

BiCROS hearing aids

It’s the same thing as a CROS but is used if one ear has no hearing and there is hearing loss in the better ear. As with the CROS, you will wear two small hearing aids, one which transmits sound from the poor ear to the better ear. The hearing aid on the better ear now acts as both a receiver of sound from the poor side and a hearing aid.

You will be able to localize sound so well, with both CROS and BiCROS that you’ll feel that you are now hearing on both sides.

I’ve been fitting both CROS and BiCROS for over 30 years, and I’m still thrilled at how people love these hearing aids!

My team at Audicus programs both CROS and BiCROS hearing aids. Please let us know if you would like more information, we’ll be more than glad to tell you all about it.


5 responses to “Ask our audiologist: What are BiCROS and CROS hearing aids?

  1. When I did the hearing test, when I should have heard tones in my right ear I could hear them in my left ear, I tried numerous times and kept being prompted to check that my earphones were in correctly which they were. I completed the test a bit weary and have been using my hearing aids with volume lowered as far down as they will go,
    I wonder if that test was accurate? I don’t want to damage the hearing I have.
    Would you please test me again to be sure?

  2. Why do some hearing aids require a mould for the inside of the ear and others do not?

  3. I have hearing loss more than 90db in right ear.In left ear loss is more than 70 severe.Now I wear resound hearing aid on both ears. I hear sounds but with no clarity of speech. Resulting I feel difficulty in conversation and in noisy situations.what to do to overcome this difficulty. I use ENYA4 andENZO5 IN left and it ear respectively.

  4. Hi. Isn’t there a hearing aid that can do both? For example: My bad ear has severe in the low (starts off 60-70 decibels and drops off profound in the highs (100-115). I am able to listen to music even if I can’t understand speech. I want to be able to hear. Isn’t there a hearing aid that gives that poor ear stimulation while transferring the sound to the good ear? I’m not sure if that is weird to have… I haven’t worn hearing aids for 16-17 years and starting to lose some hearing. Seems like my brain is craving for information out of the poor ear. I was able to understand “cowboy” and “baseball” words in the poor ear but single words was out of the question (20% word score). I thought auditory therapy would help if I had someone to work with me with a hearing aid on that ear. As a child, they ignored the poor ear and treated my good ear that was worse using an analog hearing aid with a cookie-bite hearing loss. I had normal lows and near perfect high frequency which is beginning to go down, but speech range in the middle is moderate to almost severe.

    I am willing to try anything to see if I can get that word score up… I hold onto hope.

  5. I am interested in your product.
    Went to Audiologist yesterday I was quoted $5000 last years for $4010. I can not afford a 4000.00 hearing aid and was wondering if it is possible to get a good hearing aid??? Right ear has very limited hearing And was talking about the same as you mentioned.

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