Detecting a hearing aid

Has anyone searched for a hearing aid with a metal detector? A person called me to help him find a lost hearing aid valued at about $6000. I tried my G2 but could only detect it at about 2" in all metal with a very choppy inconsistent signal. Way too many competing signals and emi was difficult. I tried my AT Pro with a borrowed hearing aid. It would give a one-way iron tone with zero descrimination. If I rolled the hearing aid over I would two signals, one weak iron and a mid tone. When rolled the aid another 90 degrees I got no signal. Anyone have any suggestions?

Thanks for any help,

Dalpal

if anything could do it it would be the g2! how long ago was it lost? lost in grass, dirt, sand?
chuck.

Chuck,
It was lost on a lawn when there was no snow and the ground was soft enough for the hearing aid to sink if it was stepped on. The person who lost it owns a tree service. A large spruce tree tipped over on a house. No damage to the house but he had a bucket truck and some helpers working on the project. We expect about 8" of snow tonight so it will be even harder to search. Probably a lost cause.

Dalpal

dalpal Wrote:
-------------------------------------------------------
> Chuck,
> It was lost on a lawn when there was no snow and
> the ground was soft enough for the hearing aid to
> sink if it was stepped on. The person who lost it
> owns a tree service. A large spruce tree tipped
> over on a house. No damage to the house but he had
> a bucket truck and some helpers working on the
> project. We expect about 8" of snow tonight so it
> will be even harder to search. Probably a lost
> cause.
>
> Dalpal

not a lost cause! it would not be deep probably just laying on the surface. very small target, you are probably only detecting the battery. if it gets wet it might be ruined.
chuck.

Was wondering about a strong magnet, googled hearing aid exploded view not much in there of any size 2 small circuit boards, tiny copper wire , micro fuel cell and a small microphone.Hope your friend finds it . HH & H new year

I would try a Whites GMT or a Goldbug II. Either one should pick up the battery at 4-6".

Cheers

turtleman Wrote:
-------------------------------------------------------
> I would try a Whites GMT or a Goldbug II. Either
> one should pick up the battery at 4-6".
>
> Cheers

If a G2 or a GB Pro wont find it neither will a GB 2 or a GMT

I wonder if this is a job for a non-linear junction detector (NLJD), used for anti-spying, 'bug detector', normally.

Personally my idea would be to test a like battery which may give you a better idea where it might come in on a detector meter. Imagine the fellow would have a spare for you to see....Doubt if you would get much depth so better get it before the snowfall as imagine the wet cold enviroment would probably ruin the unit if it stays unfound for any period of time...

I tested my wife's hearing aid with my Teknetics T2se and the 5 inch coil in air. I have EMI in my kitchen and had to lower the sensitivity to 50 to null the EMI out. The disc was 0 and the tones was one. I could detect the aid with battery in at 6 inches. Without the battery I could pick up the aid at 4 inches. With the aid and battery I could not pick it up with the disc at 4. Hope this helps'

Thanks for the replies,

I havn't given up and will try again if we get a warm spell. The EMI at the site adds to the problem. My wife has hearing aids so I have them and spent batteries to play with. The idea of the a non-linear junction detector is interesting although with my limited knowedge of electronics I can't tell if it would be useful on the ground. I like a challenge but I have have a reasonable chance of sucess.

Any other suggestions appreciated,

Dalpal

Practicing on another hearing aid should help you with locating it ! Good luck !