From a press release by Siemens Hearing:
(Washington D.C.) March 31, 2005 – Siemens Hearing Instruments, Inc. – the leading manufacturer of hearing instruments in the United States – today announced the introduction of a state-of-the-art “open” ear hearing instrument which is virtually invisible and was specifically designed to eliminate the “plugged-up” feeling that some wearers experience. ACURIS Life is a behind-the-ear (BTE) instrument which uses a newly developed tip and tubing and incorporates the recently introduced, cutting-edge, proprietary ear-to-ear (e2e) wireless technology. The new system represents the most technologically advanced, inconspicuous hearing solution for the 392 million people with mild to moderate hearing loss.
e2e wireless technology, pioneered by Siemens and introduced late last year, enables the left and right hearing instruments to communicate with each other and function as one hearing system, thereby creating a level of synchronization never before possible in hearing instruments. ACURIS Life with e2e wireless technology automatically adjusts itself to the wearer’s listening environment, but if desired, synchronized controls allow wearers to adjust the volume or program for both ears with a single adjustment.