I have been very free with dispensing my mantra about mobile technology that says simply a mobile device must enable you to do the task at hand and do it well to be truly useful. It is great when I run across mobile devices that fit this description and enable the user to do something they ordinarily can’t do. The ELI Ear-Level Instrument is a Bluetooth hearing aid that enables users who depend on hearing aids to interact with cell phones and PDAs.
The ELI user can answer cell phone calls hands-free and hear the call clearly using the Bluetooth hearing aid. From the ELI web site:
ELI provides bidirectional digital communication between a Bluetooth-enabled mobile phone and a hearing aid. Since the signal being transmitted between these devices is digital, it is not subject to the same sources of interference as other types of wireless transmission, such as analog FM or analog inductive transmission.