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automatic noise control

A technology of active noise control and noise, applied in the direction of active noise control, sounding equipment, spatial/structural arrangement of loudspeakers, etc.

Active Publication Date: 2021-11-30
HARMAN BECKER AUTOMOTIVE SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the robustness of these two types of systems can be problematic, making it often desirable to increase the robustness of ANC systems, especially for automotive applications

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[0015] In fact, even EOC systems and RNC systems are somewhat weak in terms of robustness and are even relying on signals from non-acoustic sensors such as revolutions per minute (RPM) sensors or acceleration (ACC) sensors as their The same is true when the noise of the ANC algorithm is referenced to the input signal. In general, relying on such a source eliminates the robustness issues associated with the reference feedback path, since no time-varying room impulse response (RIR) change occurs from the secondary source to the reference sensor. However, RIR occurs on a path known as the "secondary path" between a secondary source (eg, a speaker) and an error signal sensor (eg, a microphone), which varies over time. Secondary path parameters can be measured (once) only when the whole system is in its "normal operating state", and these (once) measured " fixed" parameter. However, this is not always the case, and as soon as the difference between the fixed and actual secondary ...

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Abstract

The present invention discloses an active noise control system and method comprising: using a first subsystem to generate anti-noise configured to reduce or eliminate noise occurring at a listening position; and using a second subsystem to generate noise immunity configured to reduce or eliminate noise occurring at the listening position, wherein the first active noise control subsystem is more robust than the second active noise control subsystem sex.

Description

technical field [0001] The present disclosure relates to a system and method (generally referred to as a "system") for automatic noise control. Background technique [0002] Automatic Noise Control (ANC) technology has been applied, for example, to products in the automotive industry. The technologies that have been used in the automotive industry can be basically divided into two categories, one is a narrow-band feed-forward control system to deal with engine noise, which is called an engine sequence control (EOC) system, and the other is a system using A broadband feed-forward control system for reducing road noise, it is called Road Noise Control (RNC) system. However, the robustness of these two types of systems can be problematic such that, especially for automotive applications, there is often a need to increase the robustness of the ANC system. Contents of the invention [0003] An exemplary active noise control system includes a first active noise control subsyst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R16/02G10K11/00G10K11/16G10K11/26
CPCB60R16/02G10K11/17857G10K2210/1282G10K2210/3221H04R5/023H04R2499/13G10K11/17883G10K11/17879B60N2/879G10K11/17833G10K11/1785G10K11/17817G10K11/17881G10K11/178G10K2210/128G10K2210/3037G10K2210/3046G10K2210/3055B60N2/42709
Inventor M.克里斯托夫
Owner HARMAN BECKER AUTOMOTIVE SYST