New-Generation Digital: These hearing aids offer 16 bands - treble, bass, and mid-levels - for the most precision in sound quality and clarity. "We can computer-program a hearing aid on as many as 16 bands, to match their hearing loss at every pitch. It's tailor-made to match their hearing loss," explains Dibkey. "And the directional microphones are clinically proven to be most effective in improving speech intelligibility in noisy situations." Cost: $1,200 to $3,500.
"The newest technology is definitely worth the expense," says Dibkey. "No hearing aid can eliminate background noise entirely, but they're getting better -- and the newest ones are the best we've ever had. And the clarity is amazing. ... It's like comparing CDs and DVDs with records and video tapes."
http://www.webmd.com/a-to-z-guides/features/new-hearing-aids