skip to Main Content
phonak cros hearing aids banner

Are You Deaf in One Ear ?

You may well benefit greatly from a CROS hearing aid.

CROS hearing aids transfer sound from the deaf side to the good ear and over come having to live with a deaf side. BiCROS hearing aids transfer the sound to a better ear that has some level of aid-able hearing loss.

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

CROS hearing aids are used by those who have 1 dead ear + 1 good ear.

BiCROS hearing aids are used by those who have 1 dead ear + 1 ear with aidable hearing loss.

Please watch this excellent video by Phonak

(Note: CROS II has been superseded now)


phonak cros b hearing aids+
Rechargeable CROS Hearing Aids+

Phonak CROS ‘B’

(Phonak CROS is not being launched in the later ‘Marvel’ (M) range).

CROS B superseded CROS II and has 30% longer lasting battery life.

Phonak CROS B is available in 5 styles:

  1. RIC – receiver-in-canal – size 312 battery (top left of image)
  2. RIC – receiver-in-canal – rechargeable option
  3. BTE – standard behind ear – size 13 battery
  4. Full-shell custom in-ear
  5. ITC custom in-ear (lower right in image)

What is the best ‘Phonak’ set-up?

Firstly, for both CROS and BiCROS you require a CROS hearing aid (in the dead ear) AND a hearing aid (in the good / better ear).

If you have a perfectly good ear and require a CROS hearing aid solution you just need the most basic level hearing aid available in the good side to pick up the signal from the CROS hearing aid. Cosmetics may then dictate which brand you opt for.

But, when you need a BiCROS, we recommend the Phonak CROS hearing aid alongside the best level of Phonak hearing aid to suit your budget – and set up with a Phonak remote control. Then ask your Audiologist to set up the push button the hearing aids to act as a CROS balance (a see-saw volume effect to raise the volume on either aide, the volume on the remote can adjust overall volume in sync on both sides (up and down), and you can have an extra programme with the CROS turned off.

Hopefully soon manufacturers will develop a solution that integrates the above features into a phone app which will allow better control without an accessory, along with direct phone and TV streaming. Watch this space!


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

Crystal Hearing can supply all CROS / BiCROS hearing aids via our clinic in Marlow – surrounding catchment areas include High Wycombe, Maidenhead, Reading, Slough, Henley, Beaconsfield and other areas in Buckinghamshire and Berkshire.

Back To Top