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    • 7. 发明公开
    • 충격음의 음장 표시 방법
    • 声场显示方法
    • KR1020130065023A
    • 2013-06-19
    • KR1020110131704
    • 2011-12-09
    • 현대자동차주식회사
    • 이종현박병성조문환목무균이강덕이명한
    • G01H15/00
    • G01H3/125G01H15/00G06F17/14
    • PURPOSE: A sound field display method of impact sounds is provided to express the results of the sound field visualization with a low-speed camera photographing method, thereby outputting the results of the visualization to approximately 20 frames per second. CONSTITUTION: A sound field display method of impact sounds is as follows. The impact sounds generated in a vehicle are sensed by a noise sensor. An overlap technique is applied to the signals of a time domain received from the noise sensor, the divided data blocks are overlapped after dividing the signals by a data block unit of the time domain. The signals are converted by high-speed Fourier transform into signals of a frequency domain after processing the signals of the time domain with respect to the impact sounds using the overlap technique so that the properties of noise loss of the signals caused by a weighted value is prevented. [Reference numerals] (AA) Basic analysis section; (BB) No loss area; (CC) FFT weighting(Hanning window)
    • 目的:提供冲击声的声场显示方法,以低速相机拍摄方法表达声场可视化的结果,从而将可视化的结果输出为每秒20帧。 构成:影响声音的声场显示方法如下。 在车辆中产生的撞击声由噪声传感器感测。 对从噪声传感器接收的时域的信号应用重叠技术,在将信号除以时域的数据块单位之后,划分的数据块重叠。 在使用重叠技术处理相对于冲击声的时域的信号之后,通过高速傅里叶变换将信号转换为频域的信号,使得由加权值引起的信号的噪声损失的性质为 预防。 (附图标记)(AA)基本分析部分; (BB)无损区; (CC)FFT加权(汉宁窗)
    • 8. 发明公开
    • 공간구조물에 대한 음향특성의 예측방법
    • 预测声学特征的方法
    • KR1020100121569A
    • 2010-11-18
    • KR1020090040520
    • 2009-05-09
    • 전북대학교산학협력단
    • 이형원정대업최영지
    • H04S7/00
    • G01H3/125G01H15/00
    • PURPOSE: A method for predicting an acoustic characteristic with respect to a spatial structure is provided to accurately evaluate the acoustic characteristic of a coupled space by opening a part of the space. CONSTITUTION: The pressure data of sound-wave is calculated by the time of a receiving point using a finite-difference time-domain method using a set space, information of sound-source, the location of the receiving point. An impulse response in the receiving point is calculated by adopting the pressure data of the receiving point to an inverse filter method. A sound absorbing boundary condition with respect to the opening part of the space is set in order to be spread without the reflection of sound-wave.
    • 目的:提供一种用于预测相对于空间结构的声学特性的方法,以通过打开一部分空间来精确地评估耦合空间的声学特性。 构成:使用有限差分时域方法,使用设定空间,声源信息,接收点的位置,通过接收点的时间计算声波的压力数据。 通过接收点的压力数据采用逆滤波方法计算接收点的脉冲响应。 设置相对于空间的开口部分的吸音边界条件以便在没有声波的反射的情况下被扩展。
    • 10. 发明公开
    • 일반화된 이동 프레임 음향 홀로그래피 기반의 음장 예측방법 및 시스템
    • 基于通用移动框架的声学场预测方法声学自动计算及其系统
    • KR1020100018689A
    • 2010-02-18
    • KR1020080077304
    • 2008-08-07
    • 한국표준과학연구원
    • 권휴상
    • G01H11/00
    • G01H3/125G01H9/00G01S13/00G06F17/14
    • PURPOSE: A method of predicting acoustic fields based on generalized moving frame acoustic holography and a system thereof are provided to accurately predict acoustic field on a prediction side even in case sound source surface and hologram surface are relatively moved on various coordinate systems. CONSTITUTION: A method of predicting acoustic fields comprises the following steps. According to moving coordinate systems, a first wave spectrum on a measurement plane is obtained(S420). The first wave spectrum is converted into the second wave spectrum on the reference coordinate system using relative velocity between the medium and the measurement plane(S430). The second wave spectrum is converted into the third wave spectrum using an acoustic wave propagation theory(S440). The third wave spectrum is converted into the fourth wave spectrum according to the moving coordinate system(S450).
    • 目的:提供一种基于广义运动帧声全息预测声场的方法及其系统,以便即使在各种坐标系上相对移动声源面和全息图面的情况下,也能准确预测预测侧的声场。 构成:预测声场的方法包括以下步骤。 根据移动坐标系,获得测量平面上的第一波谱(S420)。 第一波谱使用介质与测量平面之间的相对速度在参考坐标系上转换为第二波谱(S430)。 使用声波传播理论将第二波谱转换成第三波谱(S440)。 根据移动坐标系,将第三波谱转换为第四波谱(S450)。