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US 8,325,931 B2Granted
Detecting a loudspeaker configuration
AssigneeBose Corporation
InventorsDamian Howard, Marc L. Mansell, Tobe Barksdale, Hal P. Greenberger, Matthew R. Hicks
Life of this patent
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Abstract
A detecting circuit measures at least one response characteristic of an output channel in an electro-acoustic transducer system. A memory stores a plurality of equalizations, each equalization corresponding to a known electro-acoustic transducer system associated with at least one response characteristic stored in the memory. A processor in communication with the detecting circuit and the memory selects one of the stored response characteristics matching the response characteristic measured by the detecting circuit. In some cases, an appropriate equalization is loaded based on the selected response characteristic.
Claims16
An apparatus comprising:
- a detecting circuit to measure at least one response characteristic of an output channel in an electro-acoustic transducer system connected to an output terminal of the apparatus;
- a memory storing a plurality of equalizations, each said equalization corresponding to a known electro-acoustic transducer system, and storing a plurality of response characteristics, each said response characteristic associated with one said equalization;
- and
- a processor in communication with the detecting circuit and the memory and including executable instructions to select one of said stored response characteristics matching the response characteristic measured by the detecting circuit;
- wherein the response characteristic is an electrical impedance response characteristic;
- and
- wherein the detecting circuit comprises:
- an impedance to digital converter;
- and
- a first switch coupled to the impedance to digital converter and to the output terminal and under the control of the processor to selectively couple the impedance to digital converter to the output terminal in place of an amplification circuit.
7 more elements
An apparatus comprising:
- a detecting circuit to measure at least one response characteristic of an output channel in an electro-acoustic transducer system connected to an output terminal of the apparatus;
- a memory storing a plurality of equalizations, each said equalization corresponding to a known electro-acoustic transducer system, and storing a plurality of response characteristics, each said response characteristic associated with one said equalization;
- and
- a processor in communication with the detecting circuit and the memory and including executable instructions to select one of said stored response characteristics matching the response characteristic measured by the detecting circuit;
- wherein the executable instructions, when executed, cause the processor to select the stored response characteristic by:
- computing an amount by which each of a magnitude and phase of a complex frequency response of the output channel varies from a magnitude and phase of each of one or more of the stored response characteristics, and
- wherein the response characteristic measured by the detecting circuit is an electrical impedance response characteristic.
4 more elements
An amplifier assembly, comprising:
- a detecting circuit to measure at least one response characteristic of an output channel in an electro-acoustic transducer system;
- a memory storing a plurality of equalizations, each said equalization corresponding to a known electro-acoustic transducer system, and storing a plurality of response characteristics, each said response characteristic associated with one said equalization;
- and
- a processor in communication with the detecting circuit and the memory and including executable instructions to select one of said stored response characteristics matching the response characteristic measured by the detecting circuit;
- wherein the executable instructions, when executed, cause the processor to select the stored response characteristic by:
- computing an amount by which each of a magnitude and phase of a complex frequency response of the output channel varies from a magnitude and phase of each of one or more of the stored response characteristics, and
- wherein the response characteristic measured by the detecting circuit is an electrical impedance response characteristic.
4 more elements
A head unit, comprising:
- a detecting circuit to measure at least one response characteristic of an output channel in an electro-acoustic transducer system;
- a memory storing a plurality of equalizations, each said equalization corresponding to a known electro-acoustic transducer system, and storing a plurality of response characteristics, each said response characteristic associated with one said equalization;
- and
- a processor in communication with the detecting circuit and the memory and including executable instructions to select one of said stored response characteristics matching the response characteristic measured by the detecting circuit;
- wherein the executable instructions, when executed, cause the processor to select the stored response characteristic by:
- computing an amount by which each of a magnitude and phase of a complex frequency response of the output channel varies from a magnitude and phase of each of one or more of the stored response characteristics, and
- wherein the response characteristic measured by the detecting circuit is an electrical impedance response characteristic.
4 more elements
Dependencies are inferred from the claim text.