1997

With Prisma, the first fully digital hearing instrument, Siemens set new international standards for digital hearing aids.

In addition to all-round hearing, the TwinMic™ multi-microphone system also permits the selection of directional hearing focused in front of the wearer, which makes speech more intelligible even in group situations or other noisy environments.

And with "speech-sensitive signal processing", Prisma reduces ambient noise even further.