Actually, there are plenty of times when I was a woking engineer that a talking DMM would have been a godsend. That's why Omega Instruments makes one -- definitely not for blind people.
True story, when I told the sales rep I was blind, he resused to sell the meter to me -- said it ws too much of a liaility issue (which is total BS for so many reasons I can't even list them all), so I just had a fiend buy it for me.
I suppose that he didn't realize that his company sold them wholesale to a couple of specialty distributors of assistive technologies for blind and vision impaired people. Didn't buy it from those places as they typically add a healthy margin on.
Well, I've got one, and it is built like a tank, has some nice extras like IR temp sensors, capacitance measurements, and others I'm forgetting.
Funny thing is that Radio Shack used to make a talking DMM that was just part of their normal line, was $40 and was a very nice meter, but they stopped producing that model a long time ago. I also have a little cheapie $50 talking meter that is workable, and also was not meant for blind users. I use this one as my daily meter, especially when measureing high voltages as it would be a lot esier to deal with the loss of a $50 meter than a $650 one.
Point is that there are plenty of field applications where having a talking meter is a very nice thing.
-- Jim
Jim Rebman -- recovering audiophile
Equitech balanced power; uRendu, USB processor -> Musette DAC -> 5670 tube buffer -> Finale Audio F138 FFX -> Cain and Cain Abbys near-field).
s.e.x. 2.1 under construction. Want list: Stereomour II
All ICs homemade (speaker and power next)