[geoff]

I recently had several 8-hour-plus flights and a sinus condition
afterwards.

After a week I noticed that my little under-pillow speaker (very quiet)
on which I listen to the BBC or similar if I can't sleep, was audible
in my left ear but when I rolled over on my right almost totally
inaudible at low and mid frequencies.

Experimenting over the next few days I decided that from 3kHz and lower
I had an approx 20dB loss.

I went to an audiologist, and being slightly embarrassed to make the
claim of 20dB (seemingly ridiculously high), I suggested that I might be
10dB down. Her testing revealed that I was in fact 25dB down at those
frequencies.

So not a bad initial estimate from me after all I thought !

Determined by the bone conduction part of the test, fortunately this
seems to be a temporary condition, relating to a blocked eustachian
tube. Lots of decongestant and eucalyptus oil fumes don't seem to have
cleared things yet, so semi-mono for a while yet I'm afraid....

geoff