passive horn/amp for iphone

[g1]

Pricey but interesting: About ? Volta Sound Co.

[The Dude]

That is pretty cool. A friend of mine has one of these:

Same principal, but not nearly as cool. It does make it easier to hear the Google Map lady in the car, though.

[Mick Bailey]

And here's the same idea again. This time for listening to whispering voices in a walking stick handle;

http://previews.agefotostock.com/pre...SI-1293007.jpg

Can you hear me, mother?

[The Dude]

And here's the same idea again. This time for listening to whispering voices in a walking stick handle;

http://previews.agefotostock.com/pre...SI-1293007.jpg

Can you hear me, mother?

That is a prototype for the iphone 6.