Hi Trevor, and Jan,
There is a serious flaw in this analysis, and this flaw has been repeated over and over in our field.
You cannot, and should not, treat means as meaningful (pun nice, but unintended).
1) Hearing loss, and consonant (phone) perception are poorly correlated (Trevino and Allen, JASA, 2013).
2) Your final hearing loss (HL), while not a good predictor of your speech loss, is a meaningful measure of your
3) HL at the age of 80 depends strongly on you noise exposure over the proceeding 79 years. If your
a carpenter or professional violinist, and you didn't wear ear plugs, then you will have a very sever loss.
If you take careful care of your ears, by wearing earplugs at the drop of a had, when the level goes up
(it is 10 s before the plugs go in for me, and that may be too late).
You do know, I hope, about the C. Liberman and S. Kujawa (Harvard Med school) study and what they now call "Hidden hearing loss."
4) The HL for women and men at the same old age are very different. This I assume, is explained by their
exposure. But I expect someone will disagree. I would love to (briefly) discuss this question.
So take care and you wont hit that average, even at 80.
On 01/26/2016 02:42 AM, Jan Schnupp wrote:
you might find this little demo of old age hearing loss interesting:
If you click on "show background info" you'll see what data this demo is based on and what it does. The average 80 year old hearing is really scarily bad and I secretly hope that my demo is an exaggeration, but it is based on a peer reviewed study Lee and colleagues http://www.ncbi.nlm.nih.gov/pubmed/15692300 <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.ncbi.nlm.nih.gov_pubmed_15692300&d=BQMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=N7KKV9mcvQqNgAal48W_vzPUNrKl5mBxlJo8xP9z028&m=ofrwVclH_UTZOlj8AJEssT41jMz4O36b4JmucwLvduE&s=GQApKsn931UeWMY7Gu6HUPwCjpV5-vcuykW142zv4qY&e=> which looks well conducted, so unless the population they had access to is somewhat unrepresentative of ... well .. us (clutching at straws here?)... then I guess the answer is probably yes, if you live long enough the odds are 50% or more that your hearing will get really quite bad at the end.
On 25 January 2016 at 13:47, Trevor Agus <t.agus@xxxxxxxxx <mailto:t.agus@xxxxxxxxx>> wrote:
When encouraging people to be interested in hearing impairment,
I'd like to say "most of us will be deaf". (The more common "1 in
6 adults in the UK..." isn't quite as personal.)
My best guess is that this is almost true, given our long life
expectancy and the increasing risks of presbycusis, but I'd love
to be able to put a figure on it.
Does anyone on the list have the epidemiological ability (and the
data) to estimate what proportion of the adult population (in the
UK or elsewhere) will at some point have a clinically significant
hearing loss at some point?
All the best,
Prof Jan Schnupp
University of Oxford
Dept. of Physiology, Anatomy and Genetics
Sherrington Building - Parks Road
Oxford OX1 3PT - UK