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System and method for active noise control with adaptive speaker selection

一种有源噪声控制、扬声器的技术，应用在自适应网络、主动噪音控制、发声器械等方向，能够解决源位置和特性随时间变化等问题

Active Publication Date: 2010-11-17
HARMAN INT IND INC
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AI Technical Summary

Problems solved by technology

However, some loudspeakers may not be used to generate anti-noise, but in some cases these may be more suitable than the loudspeakers used due to the location and nature of the source of the undesired sound
Additionally, the source location and characteristics of the undesired sound may change over time

Method used

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  • System and method for active noise control with adaptive speaker selection
  • System and method for active noise control with adaptive speaker selection
  • System and method for active noise control with adaptive speaker selection

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Embodiment Construction

[0020] Active noise control (ANC) systems are configured to generate destructively interfering sound waves to generate one or more quiet zones. Generally, this is achieved by first determining the presence of the unwanted sound and then generating destructive interfering sound waves. Destructively interfering sound waves may be included as part of the speaker output from the speaker. Each speaker may include one or more transducers configured to convert electrical signals into sound waves representative of received electrical signals. A transducer, such as a microphone, in each quiet zone can receive undesired sounds and sound waves from a loudspeaker driven using the speaker output. Each microphone may include one or more transducers configured to detect sound waves and convert the detected sound waves into representative electrical signals. Each sensor can generate an output signal based on the sound waves it receives. The output signal may represent an error signal repre...

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Abstract

An active noise control system generates an anti-noise signal to drive a first speaker group including at least one speaker to produce sound waves to destructively interfere with an undesired sound in at least one quiet zone. The active noise control system receives error signals representative of a combination of undesired sound and destructively interfering sound waves produced by the first speaker group. The active noise control system may select a second speaker group to replace the first speaker group based on the error signals.

Description

technical field [0001] The present invention relates to active noise control, and more particularly to automatic selection of loudspeaker combinations for producing destructively interfering sound waves. Background technique [0002] Active noise control can be used to generate sound waves that destructively interfere with unwanted sound waves, or "anti-noise." Destructively interfering sound waves can be generated by speakers to combine with the undesired sound waves in an attempt to cancel out the undesired noise. The combination of destructively interfering and undesired sound waves can eliminate or minimize the perception of the undesired sound waves by one or more listeners within the listening space. [0003] Active noise control systems generally include one or more microphones to detect sounds in an area intended to destructively interfere. The detected sound is used as a feedback error signal. This error signal is used to adjust an adaptive filter included in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H21/00
CPCG10K2210/1282G10K2210/111G10K2210/3016G10K11/1786G10K11/17817G10K11/17825G10K11/17854G10K11/17857G10K11/17879G10K11/17881
Inventor 瓦桑特·施里达杜安·沃茨
Owner HARMAN INT IND INC
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