Sonova Ag

Sven Keller

Roland Hug

Christoph Leist

Jonas Meyer

Martin Rahn

Marco Breitler

The present invention proposes a sound tube () for an earpiece (), wherein a first section () of an inner surface of the sound tube () has a structured surface, in particular a textural pattern forming a relief comprising convexities () and/or concavities (). Alternatively or additionally, the sound tube () features a radially extending, circumferential flange (), annular lip (') or collar at an outer surface of the sound tube (). The present invention is further directed to a sound tube arrangement comprising two of the proposed sound tubes integrally formed in one piece and to an earpiece () with such a sound tube () or such a sound tube arrangement as well as to a hearing device with such an earpiece ().

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Wila/ZH, Switzerland

Sven Keller