On 25/10/2012 18:44, Jim Hawkins wrote:
Bert Coules wrote:
It's an interesting notion but surely impractical, I'm afraid: quite
apart from the need to boost only higher frequencies, the angling
required would make any shoulder pads a very odd shape indeed.

No. Fresnel mirrors can be of arbitrary external shape, and so could
fit the shoulders in exactly the same way as ordinary shoulder pads.

Modern hearing aids are small, self-contained, hard to spot, very
efficient and even programmable with different frequency responses
for differing conditions. And available free on the NHS. That's
tough competition.

If only all that were true !


And which bit is NOT true?

I do have to wonder about "hard to spot", but compared to the huge lump
my grandmother had hanging from a clip, nearly continuously emitting
very loud, piercing noises, it is at least arguable.

--
Rod