See an ENT (ears-nose-throat) doctor before deciding on any gear fixes. There are two things I see wrong with your diagnoses. Your wife may not have a physiological problem with ear clearing at all, it could just be technique.
First you say your wife get's tropical ear infections, this tells me she gets water trapped in her outer ear canal. Next she has trouble equalizing, this tells me she can't push air through her Eustachian tubes, which is a middle ear problem. The Eustachian tubes are located right near your tonsils and leads up to your middle ear.
Having a narrow outer ear canal should not affect the ability to equalize. Having thin tubes does. It could all be just a technique problem with equalizing. Does she have any trouble popping her ears on a plane or when ascending a mountain? If not, then it's probably all technique.
sorry i assumed her getting infections all the time from getting water in the ear was due to the narrow ear canal and and because she had a narrow ear canal this would make it more difficult to equalise her ears. she does have issues with her ears on a plane and even driving down mountains.
she was given a referral to a specialist but just hasn't organised it yet.
thanks for all the helpful info
cheers
---------- Post added March 10th, 2013 at 10:28 AM ----------
As has already been said, the ear infections one gets from swimming involve the external auditory canal (the tube from the outer ear to the drum). The skin there gets soft and vulnerable from being wet, and bacteria set up shop in it. This has nothing at all to do with being able to equalize, which involves the Eustachian tube, or the tube from the middle ear to the throat. I have a small essay on the difference
HERE.
Problems with equalizing are most often due to technique, and the good news is that the technique can be learned and practiced without ever getting in the water.
HERE is a good video about the diver's ear, anatomy and equalization. If your wife can pressurize her ears on land, and can make airplane flights without undue difficulty, the chances are very good that she simply needs to learn how and when to clear her ears underwater. Do be aware, however, that ear problems are also a frequent excuse used by people who are anxious and really don't want to be underwater. If this is your wife's issue, it's probably a better idea not to push "solutions" at her.
TSandM,
thanks for the info and i wont be pushing her into diving, she just said while i was doing my open water that she wished she could do it too and was jealous. i thought i might try to find some ways to help her with her ear and then present them to her so she could try them and then maybe she might be able to go diving after all. i think i will push her to go to the specialist though.
cheers