Oticon ‘Corda 2’ thin tube


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Oticon ‘Corda 2’ thin tube
For thin tube hearing aids by Oticon and Bernafon: Epoq, Vigo, Agil, Acto and Acto, including P models. Also for NHS Spirit 3, Zest, Zest 2 and Synergy models;. Can be used if you want to convert your NHS hearing aid from ear mould and thick tubing TO thin tubes.

We also have stocks of older Corda 1 tubes (for Spirit I II III non-Zest, Syncro, Tego, Safran models) to clear.

Corda 2 tubes are marked as follows: for example a left size 2 tube will read (in blue) ‘2  0.9‘ (0.9 means the tube is 0.9mm diameter – all Corda 2 tubes are. 2 is the size – range from 0-3)

You must use Corda domes with Corda 2 tubes.

Click for Advice

If you do not know what size of tube you need:
have a look near the tip of your old tubes – there should be a number usually Red on the left and Blue on the right.
alternately email us (info@hearingaidparts.co.uk) having taken the measurement from the top of your ear (where spectacles would sit) straight down to the centre of the ear canal entrance in mm – please see picture below.


If you want to convert a mould hearing aid to thin tube:
Then you’ll need the Oticon Corda 2 thin tube conversion kit – (For 2 aids) The adaptors, pins and pin tool to allow the user to convert an NHS Spirit / Synergy / Zest hearing aid from a standard ear hook and mould to a thin tube type – you’ll also need CORDA 2 TUBES and DOMES, purchased separately. Here’s a guide:


Guidance on Corda 2 dome size: Small domes are about 5mm wide / diameter. Medium is 7mm (by far the most popular type), Large about 10mm. Plus domes are the tulip-shaped type, for more severe hearing losses. Plusdomes are more likely to inhibit whistling (FEEDBACK) but more likely to cause OCCLUSION (the sensation of your own voice sounding louder).

Replace your thin tubes at least ONCE A YEAR for optimal performance