Automatic and simultaneous control of loudness and loudness compensation of an audio signal
First Claim
1. An audio loudness and loudness compensation circuit capable of simultaneously and automatically controlling the loudness compensation of audio as the loudness of the audio is changed comprising:
- a resistor coupled to an input terminal for receiving an audio signal and a movable contact for moving along the resistor for providing a different resistor value from the input terminal to the movable contact capable of controlling the loudness of audio from a speaker, and a parallel circuit of a capacitor and an inductor coupled through the movable contact to be in series with the resistor value from the input terminal to the movable contact wherein the resistor value in series with the parallel circuit is a band reject filter capable of controlling the loudness compensation of the audio signal from the speaker.
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Accused Products
Abstract
The invention disclosed is a room volume control that simultaneously and automatically controls both the loudness and the loudness compensation of sound from speakers of an audio system as the volume level is changed. A resistive volume control having a movable contact provides a different resistor value from an input terminal of the volume control to the movable contact for controlling the loudness of an audio signal. A parallel circuit of an inductor and a capacitor coupled through the movable contact is in series with the resistor value of the resistive volume control from the input terminal to the movable contact for controlling the loudness compensation of the audio signal.
33 Citations
24 Claims
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1. An audio loudness and loudness compensation circuit capable of simultaneously and automatically controlling the loudness compensation of audio as the loudness of the audio is changed comprising:
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a resistor coupled to an input terminal for receiving an audio signal and a movable contact for moving along the resistor for providing a different resistor value from the input terminal to the movable contact capable of controlling the loudness of audio from a speaker, and a parallel circuit of a capacitor and an inductor coupled through the movable contact to be in series with the resistor value from the input terminal to the movable contact wherein the resistor value in series with the parallel circuit is a band reject filter capable of controlling the loudness compensation of the audio signal from the speaker. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An audio loudness and loudness compensation circuit capable of simultaneously and automatically controlling the loudness compensation of audio as the loudness of the audio is changed comprising:
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a resistor volume control having at least one input terminal coupled to at least first and second resistors coupled in series and a movable contact adapted to be selectively coupled to the input terminal either directly or through the first or the first and second resistors, and a capacitor in parallel with an inductor coupled between the movable contact and an output terminal wherein the value of the resistor between the at least one input terminal and the movable contact of the resistor volume control is capable of controlling the loudness of audio from a speaker and the value of the capacitor in parallel with the value of the inductor in combination with the value of the resistor between the at least one input terminal and the movable contact of the resistor volume control is capable of controlling the loudness compensation of audio from the speaker. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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10. The circuit of claim 10 wherein the inductor has a metal core.
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17. An audio loudness and loudness compensation control comprising:
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a resistive volume control having step contacts located at junctions of series coupled resistors and a movable contact for making contact with a selected one of the step contacts wherein each step contact provides a different resistor value to a signal from an input terminal of the volume control to the movable contact for controlling the loudness of an audio signal, and a parallel circuit of an inductor and a capacitor coupled in series through the movable contact to a step contact in the resistive volume control for controlling the loudness compensation of the audio signal. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification