Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Karlheinz Bay

Philip Leistner

Michael Leistner

Daniel Beer

Lutz Ehrig

Lorenz Betz

Waldemar Maysenhölder

Philipp Leistner

Waldemar MAYSENHÖLDER

Wolfgang Herget

Werner Moll

Peter BRANDSTÄTT

An acoustic system is provided that includes a transducer having a housing, which encloses a volume and in which at least a surface or a sub-surface is formed by a sheet-like structure configured to vibrate. Powder made of adsorbent material having an adsorption effective surface may be present in the volume. The powder may be selected such that, through a movement of the powder caused by vibrations of the sheet-like structure configured to vibrate, the adsorption effective surface is enlarged. The adsorbent material may be selected such that an adsorption of air or gas present in the volume is caused by an increase of the pressure caused from vibrations of the sheet-like structure configured to vibrate. The powder is freely movable within the housing.

Acoustic system having a housing with adsorbent powder

An electroacoustic driver includes a diaphragm, a diaphragm drive system and a diaphragm suspension. The diaphragm system is configured to subject the diaphragm to a motion, wherein the diaphragm suspension is configured to guide the diaphragm. The diaphragm drive system includes an active element configured to actively influence the motion of the diaphragm.

Electroacoustic driver

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Stuttgart, Germany

Karlheinz Bay