CROS and BiCROS Hearing aids

For ‘Single-Sided Deafness’

Are you deaf in One Ear ?

Single-sided deafness is defined as un-aidable hearing in one ear, and normal hearing OR an aidable hearing loss in the other ear.

There are three main difficulties for those people who suffer complete deafness in one ear:

  1. Loss of localising sound direction – using just the one ear makes it very difficult to know where sounds have come from.
  2. Understanding speech in noise – the brain has an amazing ability to suppress out unwanted sounds, but it can only do this when listening in stereo.
  3. The head shadow effect – low frequency sounds are longer in wavelength and can travel around the head, but high frequency sounds are shorter in wavelength and are shielded by the head. And because high frequency components of speech dictate clarity this makes it difficult for people to follow conversations from their dead side without turning their head all the time.


CROS hearing aids may be your solution to a better life


CROS stands for ‘Contra-lateral Routing of Signal‘.


CROS hearing aids are used by those who have 1 dead ear + 1 ear with NO hearing loss.

Bi-CROS hearing aid solutions are  for those who have 1 dead ear + 1 ear WITH hearing loss.



Latest CROS Hearing Aids

The leading brands offering CROS hearing aids are:

(in no particular order)

Resound & Bernafon and do not currently offer CROS hearing aids.


Please watch this excellent video by Phonak

(Note: CROS II has been superseded)

What is the best CROS Hearing Aid?

The best CROS hearing aid ultimately depends on three things:

  1. which amplified sound response works best for you
  2. what set up offers the right control
  3. what style you want to wear

So a few things to consider:

  1. Do you want compatibility with iPhone or Android?
  2. Do you want behind-ear or in-ear?
  3. How discreet do you want it to look?
  4. Do you want rechargeable?

Cros Hearing Aids

Battery life can be poorer with CROS hearing aids as they are continuously streaming to the hearing aid, so this could also be a consideration – rechargeable CROS hearing aids are now an option, but will they give you a full day of use, especially with audio streaming (phone-calls or TV), and allowing for degradation of the battery over a few years.

We have assessed the latest CROS hearing aids for all around functionality and we can safely say that the Starkey Livio Edge CROS hearing aid offers the most complete solution – and as such is THE BEST CURRENT CROS HEARING AID.

This is not to disregard other brands; and the Starkey may not suit everyone – sound quality can dictate what people choose, and everyone hears differently.

Why is the Starkey Livio Edge so good? – it offers full mobile phone control – for synchronised volume control and / or CROS balance control (switching focus to one side or the other like a see-saw effect), rechargeable, in ear or behind ear, and also offers directional focus control via the app in both the hearing aid and the CROS hearing aid.

This is an unbiased view – we have always considered Phonak the leading technology in CROS hearing aids, but with the advent of mobile phone technology several brands have jumped into the frame, but Starkey have the most complete CROS hearing aid solution in unison with their excellent mobile phone app ‘Starkey Thrive‘ – download it and take a look.

Read more on mobile phone connectivity – made for iPhone OR made for Android

Read more on rechargeable hearing aids

If you want an invisible CROS hearing aid solution then the Signia SILK may be what you need – see below for details.


We offer a 60 day money back guarantee on all CROS hearing aids

Signia SILK CROS – In-Ear

Signia have introduced  CROS hearing aid technology in their SIGNIA SILK miniature in-ear modular hearing aids, using high speed inter ear wireless hearing aid transmission technology.


signia silk domes
Rechargeable CROS Hearing Aids


Dear John, Just to let you know that I have already received my hearing aids back from Phonak repair. A very good service. This CROS system that you recommended has been a great success and the service received from both Phonak and yourself has been extremely professional. Thank you. Peter Bywater.

Hi John, 
    Just to let you know I am really pleased with the volume remote, it is excellent. I am also amazed that with my good ear having the volume to max or just under I can hear  quite well through my deaf ear without the Cros. As stated before this is  just incredible and do not understand why my deaf ear can hear at all, let alone well. The Cros makes the hearing really good so I will still need to wear this as well, especially in group situations. 
   So all I can say is a big thank you and hope everything continues as of now.   Obviously I will need to see you again from time to time so do I just wait until I need my ears cleared of wax again, or what ? I am so pleased I came to you and thank you for your patience. Your web attachment will mean I can purchase everything I need in the meantime. 
John B
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