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US 10,375,489 B2Granted
Audio system with integral hearing test
OwnerRobert Newton Rountree, Sr.inventor
Life of this patent
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Abstract
An audio circuit with an integral hearing test is disclosed. The circuit includes at least one variable gain amplifier (VGA) coupled to receive an audio signal and a plurality of filters. Each filter is coupled to the at least one VGA and configured to filter an output signal from the at least one VGA. A processor is coupled to the VGAs and configured to apply a selected frequency to the at least one VGA in a test mode and to control a gain of the at least one VGA in a normal mode.
Claims20
A circuit, comprising:
- a plurality of variable gain amplifiers (VGAs) coupled to receive an audio signal;
- a switch to select the audio signal from a plurality of sources in a normal mode;
- a plurality of filters, each filter coupled to a respective VGA and configured to filter an output signal from the respective VGA;
- and
- a processor coupled to the VGAs and configured to apply a respective audio frequency to each VGA in a test mode to determine a respective Pain for each VGA based on user input
- and to apply the respective gain to each VGA in the normal mode.
3 more elements
A method of operating a circuit, comprising:
- applying a first audio frequency to a first band-specific circuit in a test mode of operation;
- incrementing a first gain of the first band-specific circuit by a processor until a user input is received;
- displaying the first audio frequency and the first gain;
- storing the first gain in a nonvolatile memory of the processor in response to the user input;
- and
- applying the first gain to the first band-specific circuit by the processor during a normal mode of operation.
3 more elements
A circuit, comprising:
- a plurality of band-specific circuits coupled to receive a respective audio frequency in a test mode and produce a respective band-specific output signal;
- a processor configured to store a gain of each respective band-specific output signal in response to a respective user input signal;
- a switch to select an audio signal from a plurality of sources in a normal mode;
- and
- an input circuit configured to apply the audio signal to each band-specific circuit during the normal mode, wherein each band-specific circuit produces a respective normal mode output signal having the respective stored gain.
2 more elements
Dependencies are inferred from the claim text.