Unlock instant, AI-driven research and patent intelligence for your innovation.

Engine noise control

A noise control, active noise control technology, applied in active noise control, sounding equipment, instruments, etc., can solve the problem that the RPM sensor cannot cover the signal and so on

Active Publication Date: 2017-08-04
HARMAN BECKER AUTOMOTIVE SYST
View PDF14 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, RPM sensors are not able to cover signals other than harmonics

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Engine noise control
  • Engine noise control
  • Engine noise control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] As the name suggests, EOC technology is only able to control the noise corresponding to the sequence of the engine. With such systems, other components of engine noise that have non-negligible acoustic impact and cannot be controlled with signals provided by narrowband non-acoustic sensors (eg, RPM sensors) cannot be counteracted. Noise is generally a term used to designate sounds, vibrations, accelerations and forces that do not contribute to the information content of the receiver but are considered to interfere with the audio quality of the desired signal. The evolution of noise is usually divided into three stages. These stages are the generation of noise, its propagation (emission) and its perception. It can be seen that attempts to successfully reduce noise initially target the noise source itself, eg by attenuating the noise signal and subsequently by suppressing the propagation of the noise signal. In many cases, however, the emission of noise signals cannot b...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An exemplary engine noise control includes directly picking up engine noise from an engine of a vehicle at a pick-up position to generate a sense signal representative of the engine noise, and active noise control filtering to generate a filtered sense signal from the sense signal. The control further includes converting the filtered sense signal from the active noise control filtering into anti-noise and radiating the anti-noise to a listening position in an interior of the vehicle. The filtered sense signal is configured so that the anti-noise reduces the engine noise at the listening position.

Description

technical field [0001] The present disclosure relates to engine noise control systems and methods. Background technique [0002] Engine order cancellation (EOC) technology uses a non-acoustic signal representing engine (motor) noise as a reference to synthesize a sound wave that is out of phase with the audible engine noise inside the car. Thus, EOC makes it easier to reduce the use of conventional damping materials. Common EOC systems utilize a narrowband feed-forward active noise control (ANC) framework to generate anti-noise through adaptive filtering of reference signals representing engine harmonics to be canceled. After being sent from the anti-noise source to the listening position through the secondary path, the anti-noise has the same amplitude but opposite phase as the signal generated by the engine filtered by the main path extending from the engine to the listening position. Thus, where the error microphone is located in space (e.g., at or near the listening po...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/178
CPCG10K11/178G10K2210/121G10K2210/1282G10K2210/3011G10K2210/3045G10K2210/501G10K2210/512G10K11/17883G10K11/17879G10K11/17857G10K11/17854G10K11/17817G10K2210/12822G10K2210/129G10K2210/3022G10K2210/3028
Inventor M.克里斯托夫N.扎费罗普洛斯
Owner HARMAN BECKER AUTOMOTIVE SYST