Adaptation enhancement for road noise cancellation system

A noise-cancelling, self-adapting technology, applied in sound-generating equipment, active noise control, musical instruments, etc., to solve problems such as deterioration

Pending Publication Date: 2020-06-09
HARMAN INT IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when the W filter is tuned based on these transient non-stationary events, the RNC deteriorates for a certain period of time after said event

Method used

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  • Adaptation enhancement for road noise cancellation system
  • Adaptation enhancement for road noise cancellation system
  • Adaptation enhancement for road noise cancellation system

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Embodiment Construction

[0017] As required, detailed embodiments of the invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which can be embodied in various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.

[0018] Any one or more of the controllers or devices described herein include computer-executable instructions that can be compiled or interpreted from computer programs created using a variety of programming languages ​​and / or technologies. In general, a processor, such as a microprocessor, receives instructions, eg, from memory, computer readable media, etc., and executes the instructions. ...

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Abstract

A road noise cancellation (RNC) system may include a signal analysis controller for detecting non-stationary, transient events based on sensor signals having a spectral or temporal character significantly different from steady-state road or cabin noise. Upon detection of such non-stationary events, the RNC system may modify the sensor signals to mask the non-stationary event, thereby preventing the RNC system's adaptive filters from mis-adapting because of transient, non-stationary events. Alternatively, the RNC system may pause or slow or pause adaptation of its controllable filters for the duration of a frame that includes the non-stationary event.

Description

technical field [0001] The present disclosure relates to road noise cancellation, and more particularly, to detecting non-stationary events in a feed-forward road noise cancellation system to minimize false adaptation. Background technique [0002] Active noise control (ANC) systems attenuate undesired noise using feedforward and feedback structures to adaptively remove undesired noise within a listening environment, such as within a vehicle cabin. ANC systems generally eliminate or reduce unwanted noise by producing canceling sound waves that destructively interfere with unwanted audible noise. Destructive interference occurs when noise and "anti-noise" (which are about the same magnitude as noise but opposite in phase) combine to reduce the sound pressure level (SPL) at a location. In a vehicle cabin listening environment, potential sources of undesired noise come from sounds radiated by the engine, the interaction between the vehicle's tires and the road surface on which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/178
CPCG10K11/17813G10K11/17854G10K11/17883G10K11/17885G10K2210/12821G10K11/17823G10K11/17825G10K11/17835G10K11/17881G10K11/178G10K2210/1282G10K2210/3026G10K2210/3027G10K2210/3028G10K2210/3044
Inventor K.J.巴斯特尔
Owner HARMAN INT IND INC
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