BOSTON--(BUSINESS WIRE)--Siemens Hearing Instruments, Inc. today announced XCEL — the new generation of its clinically proven* BestSound™ Technology. XCEL accelerates hearing aid acceptance by optimally balancing speech intelligibility and sound quality for each individual hearing aid wearer. Five Siemens hearing aid models feature the new XCEL technology: the discreet Pure® XCEL and Pure® XCEL Carat, the Motion® XCEL models SX and P, and the brand new Eclipse™ XCEL — a revolutionary deep-fit CIC hearing aid that is nearly invisible, extremely comfortable and entails a simple, deep-fit impression procedure.