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US 11,689,169 B1Granted
Linking audio amplification gain reduction per channel and across frequency ranges
AssigneeApple Inc.
InventorTomlinson Holman
Life of this patent
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Abstract
A method for reducing gain for audio amplification by an audio system having a tweeter channel, an optional midrange channel, and a woofer channel. Gain of the woofer channel is reduced simultaneously with reducing gain of the tweeter channel, both responsive to detecting the same instance of overloading (overdriving) the woofer channel. Other aspects are also described and claimed.
Claims20
A method for reducing gain for audio amplification by an audio system having a first sub-band channel, and a second sub-band channel, the method comprising:
- reducing gain of the second sub-band channel responsive to detecting an instance of overloading the second sub-band channel;
- and
- reducing gain of the first sub-band channel responsive to detecting the instance of overloading the second sub-band channel.
An audio system comprising:
- a first audio channel feeding a low frequency speaker driver;
- a second audio channel feeding a high frequency speaker driver;
- a processor;
- and
- memory having stored therein instructions that configure the processor to
- apply a first gain to the first audio channel;
- apply a second gain to the second audio channel;
- and
- detect that the first audio channel is being overloaded and in response i) reduce the first gain by a first amount and ii) contemporaneously reduce the second gain by a second amount that is based on the first amount.
6 more elements
Dependencies are inferred from the claim text.