Method of determining noise sound contributions of noise sources of a motorized vehicle

一种机动车辆、噪声的技术，应用在测量超声波/声波/次声波、语音分析、测量振动等方向，能够解决不实际、粗略等问题

Active Publication Date: 2016-04-06
BRUEL & KJAER SOUND & VIBRATION MEASUREMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method gives very rough results and is impractical for assessing the ensemble of the large number of independent noise sources present in complex vehicle configurations like cars, trucks or buses

Method used

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  • Method of determining noise sound contributions of noise sources of a motorized vehicle
  • Method of determining noise sound contributions of noise sources of a motorized vehicle
  • Method of determining noise sound contributions of noise sources of a motorized vehicle

Examples

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Embodiment Construction

[0072] figure 1 is a simplified schematic diagram of an acoustic measurement system coupled to a car 102 under test for determining the individual noise of multiple physical noise sources of the car 102 at the level of the driver's ear, according to a first embodiment of the present invention voice contribution. The acoustic measurement system includes a plurality of reference microphones 109-117 placed adjacent to or at least in the vicinity of each of the physical noise sources. The acoustic measurement system also includes a measurement computer 132 having a software programmable microprocessor. Acoustic measurement systems may include suitably adapted or programmed versions of the PULSE measurement platform, designed to perform sound and vibration measurements and signal analysis. The PULSE platform is commercially available from the applicant / assignee in a number of configurations. The measurement computer 132 is connected to the plurality of reference microphones 109-...

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Abstract

The present invention relates to a method and an acoustic measurement system for determining individual noise sound contributions of a plurality of physical noise sources of a motorized vehicle at a target or reference location. The method comprises steps of placing a plurality of reference microphones at respective reference positions adjacent to respective ones of the physical noise sources, placing a measurement microphone at the target location, recording a plurality of noise sound signals and recording a target noise signal. The plurality of noise sound signals are adaptively separated using blind source separation to produce a plurality of mutually independent noise sound signals representing respective estimated noise sound signals of the plurality of physical noise sources. Each of the mutually independent noise sound signals is correlated with the recorded target noise signal to determine time domain or frequency domain characteristics of a plurality of linear transfer path filters representing respective transfer functions between the plurality of independent noise sound signals and the measurement microphone at the target location. At least one of the independent noise sound signals, representing one of the physical noise sources, may be applied to the corresponding linear transfer path filter to generate at least one target noise signal component representing the individual noise sound contribution of the physical noise source at the target location.

Description

technical field [0001] The invention relates to a method and an acoustic measurement system for determining the individual noise sound contributions of a plurality of physical noise sources of a motor vehicle at a target or reference location. The method comprises the steps of placing a plurality of reference microphones at respective reference locations adjacent to respective ones of the physical noise sources, placing measurement microphones at target locations, recording the plurality of noise sound signals and recording the target noise signal . The plurality of noise sound signals are adaptively separated using blind source separation to produce a plurality of mutually independent noise sound signals representing respective estimated noise sound signals of the plurality of physical noise sources. Each of the mutually independent noise sound signals is correlated with the recorded target noise signal to determine timing of a plurality of linear transfer path filters repre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00G06F17/50G10L25/48G10L21/0216G10L21/0272
CPCG10L21/0216G10L25/48G10L21/0272G01H3/00G06F30/15G06F2119/10G01H17/00G10L21/0232G10L2021/02166
Inventor 安德烈斯·珀西·舒马彻
Owner BRUEL & KJAER SOUND & VIBRATION MEASUREMENT
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