U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Portable speakers with phased arrays

Patent 5815579 Issued on September 29, 1998. Estimated Expiration Date: Icon_subject December 1, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

3114105

3370236

3894196

3916312

Earphone construction
Patent #: 4110583
Issued on: 08/29/1978
Inventor: Lepper

Headrest speaker device
Patent #: 4490842
Issued on: 12/25/1984
Inventor: Watanabe

Personal portable audio device
Patent #: 4539700
Issued on: 09/03/1985
Inventor: Sato

User-supported transceiver set
Patent #: 4726070
Issued on: 02/16/1988
Inventor: Buzzi

Stethoscope having pseudostereophonic binaural enhancement
Patent #: 4783814
Issued on: 11/08/1988
Inventor: Foley

Method and apparatus for performing noise cancelling and headphoning
Patent #: 5138663
Issued on: 08/11/1992
Inventor: Moseley

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Inventor

Application

No. 565951 filed on 12/01/1995

US Classes:

381/301, In furniture or clothing381/309, Stereo earphone381/373, Openable to ambient381/385Having body supported structure other than on head

Examiners

Primary: Isen, Forester W.

International Classes

H04R 005/02
H04R 025/00

Abstract

A wearable speaker system which provides improved quality audio response and which does not interfere with the wearer's activities or block environmental sounds is disclosed. Transducer arrays, e.g. pairs of speakers, are situated in a wearable garment, headband, or the like and positioned on opposite sides of the wearer's head. In one embodiment, the transducer arrays share a common enclosure and are driven 180° out of phase, so that back pressures cancel and low frequency response is enhanced. In another embodiment, two open-ended enclosures are provided, each with its own transducer array. In another embodiment, linear arrays of transducers are provided with appropriate time-delays between the audio signals. The speaker system is connected to or in communication with a conventional source of audio signals, such as a radio, tape player, CD player, cellular telephone or the like.

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