This is not a $1 hearing aid and never will be. The material cost of almost any device is insignificant compared to the overall cost of manufacturing, testing, and distributing it. The barrier to low-cost hearing aids in most countries is medical regulation and liability coverage, not expensive parts. Maybe India's regulations are lax enough that someone could bulk-manufacture cheap, poorly-tested medical devices to get the price down to a few dollars, but there's no technological breakthrough in this "new device" that would enable that; if there were a viable market, it would already be manufactured. There's no profit to be made, so why would anyone bother?
