Acoustic transducer comprising a plurality of coaxially arranged diaphragms

US8897472B2 · kind B2 · utility

Assignee

• Tymphany HK Limited · CN

Inventors

• Andrew Unruh · San Jose, US
• Robert True · Pleasant Prairie, US
• Edward T. Norcott, Jr. · Los Gatos, US
• Jens-Peter B. Axelsson · Austin, US
• Alireza Jabbari · Berkeley, US
• David J. Prince · Villa Park, US
• Kenneth L. Kantor · Berkeley, US
• Ioannis Kanellakopoulos · Cupertino, US
• Shaolin Wei · San Diego, US

Key dates

• Filing date: Jun 3, 2005
• Grant date: Nov 25, 2014
• Expiry date: Oct 30, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04R2499/15
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

An acoustic transducer comprises one or more electromagnetic motors that drive one or more sets of multiple diaphragms to provide acoustically efficient loudspeaker systems having dimensions that allow use in applications that would be difficult or impossible with traditional transducers. The diaphragms may be driven directly, inertially or fluidically. If diaphragms are driven by rods that pass through holes in the diaphragms, noise may be generated by air that leaks through the pass-through holes. This noise may be reduced or eliminated by measures that reduce or eliminate the air leakage.