Head-rest and loudspeaker combination

US4027112A · kind A · utility

Assignee

• Blaupunkt-Werke GmbH · DE

Inventors

• Paul D. Heppner · Hilton, US
• Gottfried Pohlmann

Key dates

• Filing date: Feb 17, 1976
• Grant date: May 31, 1977
• Expiry date: Feb 17, 1996

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60R2011/0043
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A body of foam substance forming a head-rest, for example a head restraint for an automobile seat, an aircraft seat, or the like, provides a housing and support for the loudspeaker; the forward or head-supporting surface has at least one recess, open to the front, formed therein in which the loudspeaker is located and supported. The portion of the foam material in the recess behind the loudspeaker has open pores whereas the outer or remaining surfaces of the body are essentially airtight, for example by having their pores closed or by being covered with an essentially airtight upholstering material, perforated only in the region through which the sound from the loudspeaker is to be transmitted. This arrangement permits flexible or soft membrane suspension of the loudspeaker and thus better transducing fidelity.