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 Title: |
US5617477:
Personal wearable communication system with enhanced low frequency response
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Boyden, James H.; Los Altos Hills, CA
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| Assignee: |
Interval Research Corporation, Palo Alto, CA
other patents from INTERVAL RESEARCH CORPORATION (715526) (approx. 102)
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| Published / Filed: |
1997-04-01
/ 1995-03-08
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| Application Number: |
US1995000400901
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| IPC Code: |
Advanced:
H04R 3/12;
H04R 5/02;
H04R 5/033;
H04R 5/04;
IPC-7:
H04R 5/02;
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| ECLA Code: |
H04R5/033H; H04R3/12; H04R5/02; H04R5/02B; T04R5/04; T04R201/023;
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| U.S. Class: |
Current:
381/309;
381/074;
381/370;
Original:
381/025;
381/183;
381/074;
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| Field of Search: |
381/024,25,183,187,74
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| Priority Number: |
| 1995-03-08 |
US1995000400901 |
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| Abstract: |
A personal wearable portable communication and entertainment system which provides improved quality audio response and which does not interfere with the wearer's activities or block environmental sounds is disclosed. Transducers or speakers, which preferably are provided in arrayed pairs, are situated in a wearable structure, such as a garment for the wearer's torso or a headband for the wearer's head. The transducers are positioned on opposite sides of the wearer's torso or head, adjacent the ears. In one embodiment, the transducers share a common closed enclosure and are driven 180 DEG out of phase, so that back pressures cancel. In another embodiment, two hollow enclosures are provided, each with its own transducer and acoustic aperture. In a further embodiment, the transducers are positioned in a common hollow enclosure with at least one acoustic aperture between them. 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. With the invention, low frequency response in particular is enhanced.
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| Attorney, Agent or Firm: |
Brooks & Kushman P.C. ;
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| Primary / Asst. Examiners: |
Isen, Forester W.;
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| INPADOC Legal Status: |
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| Designated Country: |
AL AM AP AT AZ BB BG BR BY CA CH CN CZ DE DK EE EP ES FI GB GE HU IS JP KE KG KP KR KZ LK LR LS LT LU LV MD MG MK MN
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| Family: |
Show 15 known family members
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First Claim:
Show all 114 claims |
It is claimed:
1. A personal wearable, portable communication and entertainment system comprising:
- a hollow, closed structural member;
- a first transducer means mounted on said structural member;
- a second transducer means mounted on said structural member;
- said first and second transducer means positioned in spaced relation to each other on said structural member;
- driver means for driving said first and second transducer means with driving signals, said first and second transducer means being driven 180 degrees out-of-phase at a first frequency range and being driven in-phase at a second frequency range;
- said first frequency range being lower than said second frequency range;
- means for supplying audio signals to said first and second transducer means; and
- means for changing the relative phase of driving signals from said driving means when the out-of-phase response would have been approximately the same as the in-phase response;
- whereby the response of said system in said first frequency range is enhanced.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 45 U.S. patent(s) that reference this one
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