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Audio Signal Processing

Apparatus-and-method-for-equalizing-a-soundfield

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Apparatus and method for equalizing a soundfield

Details

Inventors: Rimkeit, Eugene; Schomburg, Richard;
Assignee:
Primary Examiner: Isen; Forester W.
Assistant Examiner:
Attorney, Agent or Firm: Dellett, Smith-Hill & Bedell

Apparatus for equalizing a soundfield comprises an amplifier and a gain control circuit for selectively adjusting the gain of the amplifier as a function of frequency in response to data values received by the gain control circuit. The apparatus has power supply terminals for supplying operating current from an external power source to the amplifier and the gain control circuit. In addition, the apparatus comprises an electronic storage device for storing data values and applying those data values to the gain control circuit. The stored data values are maintained in the apparatus upon interruption of the supply of operating current to the power supply terminals. The apparatus has an input port for applying data values to the storage device, and does not have manually actuable controls for selectively adjusting the stored data values.

DETAILED DESCRIPTION A preferred embodiment of the present invention in its first aspect comprises apparatus for equalizing a soundfield.
The apparatus comprises an amplifier and a gain control circuit for selectively adjusting the gain of the amplifier as a function of frequency in response to data values received by the gain control circuit.
The apparatus has power supply terminals for supplying operating current from an external power source to the amplifier and the gain control circuit.
In addition, the apparatus comprises an electronic storage device for storing data values and applying those data values to the gain control circuit.
The stored data values are maintained in the apparatus upon interruption of the supply of operating current to the power supply terminals.
The apparatus has an input port for applying data values to the storage device, and does not have manually actuable controls for selectively adjusting the stored data values.
In accordance with a second aspect of the invention, a soundfield is equalized using apparatus which comprises a first component and a second component.
The first component comprises an amplifier, a gain control circuit for selectively adjusting the gain of the amplifier as a function of frequency in response to data values received by the gain control circuit, a storage device for storing data values, and an input port for receiving an electrical signal which is coded in accordance with selected data values for applying the data values to the storage device.
The second component comprises a device for generating an electrical signal which is coded in accordance with selected data values and an output port for making the electrical signal available at the exterior of the second component.
The output port of the second component is connected to the input port of the first component and the second component is used to apply an electrical signal which is coded in accordance with selected data values to the input port of the first component, whereby the selected data values are stored in the storage device of the first component

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