Thought I would reply to the list in case anyone else was interested.
Check this out. They have one that can be adjusted to different frequencies.

http://www.walkersgameear.com/natureea.htm

Derek Sutton wrote:

> Some years ago I recall a brief thread on either tweeters or birdchat about
> high frequency hearing loss, along with some discussion about some low cost
> (I think)
> gizmos that could be stuffed in the ears and were an effective measure. Of
> course,I didn't pay much attention at the time, but now I too have reached the
> stage where kinglets, creeper, bushtits, most warblers and even chickadees
> (unless they are close) are essentially out of my hearing range. Other than
> that,
> my hearing is still fairly OK for regular interactions, so I haven't yet
> consulted
> a specialist about this problem, though I know I should. But it is playing
> hell
> with my birding. Does anyone out there remember this thread, or know about
> these
> gizmos?
>
> Derek Sutton
> Burnaby,BC

--

Jerry and Sandy Converse
Grand Coulee, WA
mailto:sanjer at televar.com
http://ConverseCorner.com

Never be afraid to try something new.
Remember, amateurs built the Ark and
Professionals built the Titanic.