公开(公告)号：US4417313A

公开(公告)日：1983-11-22

申请号：US264483

申请日：1981-05-18

申请人： Herman Medwin

发明人： Herman Medwin

IPC分类号： G06Q10/04 ,  G10K11/16 ,  G06F15/31

CPC分类号： G06Q10/04 ,  G10K11/16 ,  Y10S367/901

摘要： A method for optimizing the design of finite noise barriers by using an extension of the Biot-Tolstoy rigorous closed form impulse solution for diffraction of an acoustic pressure pulse by an infinite rigid wedge. An initial finite barrier is defined and then a calculation made of the impulse signal transmitted on one side of the barrier and received on the other side by adapting the Biot-Tolstoy solution to a digital computer. The integrals of the acoustic pressure impulse are calculated for each source/receiver path for each segment of the barrier. The integrals are then compared and the segments are adjusted and new calculations made until all integral contributions are equal. The integrals are then digitally Fourier transformed to determine attenuation at the desired frequencies. After comparison with the desired attenuation, all segments are proportionately adjusted and the entire computational process reiterated until the optimal attenuation is achieved.

摘要翻译： 通过使用Biot-Tolstoy严格闭合形式的脉冲解决方案，通过无限刚性楔形物对声压脉冲进行衍射，优化有限噪声屏障的设计方法。 定义初始有限势垒，然后通过将Biot-Tolstoy解决方案适配到数字计算机进行计算，该脉冲信号在障碍物的一侧上传输并在另一侧接收。 针对屏障的每个部分的每个源/接收器路径计算声压脉冲的积分。 然后对积分进行比较，并调整段，直到所有积分贡献相等为止进行新的计算。 然后对积分进行数字傅里叶变换，以确定在所需频率下的衰减。 在与所需的衰减进行比较之后，将所有段按比例调整，并重复整个计算过程，直到达到最佳衰减。

公开(公告)号：US4225954A

公开(公告)日：1980-09-30

申请号：US972124

申请日：1978-12-21

申请人： Herman Medwin

发明人： Herman Medwin

IPC分类号： G01S3/82 ,  G01V1/36 ,  G01S3/80

CPC分类号： G01V1/366 ,  G01S3/82 ,  G01V2210/56 ,  Y10S367/901

摘要： An acoustical deverberator for eliminating the reverberation from a sound gnal originating with a transient sound source in shallow water. The sound signal is received by a single hydrophone and autocorrelated to determine the time differences between the direct signal and the bottom surface reflected signals. Together with the surface and bottom reflection coefficients and known depths of the hydrophone and water, the time differences are used to determine corrections which are applied to the received sound signal. The result is a clean sound signal free from interfering reverberation.

摘要翻译： 一种用于消除起源于浅水中的瞬态声源的声音信号的混响的声学除颤器。 声音信号由单个水听器接收并自相关，以确定直接信号和底表面反射信号之间的时间差。 与水听器和水的表面和底部反射系数和已知深度一起，使用时差来确定应用于接收的声音信号的校正。 结果是干净的声音信号没有干扰混响。

公开(公告)号：US4219888A

公开(公告)日：1980-08-26

申请号：US967749

申请日：1978-12-08

申请人： Herman Medwin

发明人： Herman Medwin

IPC分类号： G01S1/72 ,  H04B1/10 ,  H04B11/00

CPC分类号： H04B11/00 ,  G01S1/72 ,  H04B1/1036 ,  Y10S367/901

摘要： A surface acoustic signal defader for optimizing the signal received from derwater sound scattered from the ocean surface. The bandwidth of the underwater sound source is monitored and the frequency of maximum signal strength is identified. When the maximum signal strength frequency fades a predetermined amount, reception is switched to the signal of maximum anti-correlation. This process is continuous such that when the new frequency fades the anti-correlation process will determine the optimum frequency for the new fading condition, thus resulting in optimum reception of surface scattered underwater sound.

摘要翻译： 用于优化从海洋表面散射的水下声音接收的信号的表面声信号防御器。 监测水下声源的带宽，并确定最大信号强度的频率。 当最大信号强度频率衰减预定量时，接收切换到最大抗相关信号。 该过程是连续的，使得当新频率衰减时，反相关处理将确定新的衰落条件的最佳频率，从而最佳地接收表面散射的水下声音。

公开(公告)号：US4017859A

公开(公告)日：1977-04-12

申请号：US643047

申请日：1975-12-22

申请人： Herman Medwin

发明人： Herman Medwin

IPC分类号： G01S3/06 ,  G01S3/802 ,  G01S1/02 ,  H04B1/18

CPC分类号： G01S3/8027 ,  G01S3/06 ,  Y10S367/901

摘要： A plurality of processing channels each receive one of a number of direct d secondary signal energy rays. Each channel includes an A/D converter and computer the logic of which is controlled by a Fast Fourier Transform (FFT) algorithm to produce a plurality of data outputs each containing the amplitude and phase information of selected frequencies present in the channel input. To enhance signal detection and minimize signal strength fluctuations, each of the selected frequency outputs of each channel FFT is compared with each identical frequency output of other channel FFT's. Phase compensation means such as a shift register adjusts the phase relationship between all identical FFT outputs to permit their amplitudes to be constructively added. The individual subtotals so produced are totalled to provide an output representing the combined strength of the multi-path signal energy. In particular, medium interfaces such as an air-sea or air-ground interface, produce wide variations in the incoming direction of the signal energy to be detected.

摘要翻译： 多个处理通道各自接收多个直接和次要信号能量射线中的一个。 每个通道包括A / D转换器和计算机，其逻辑由快速傅里叶变换（FFT）算法控制以产生多个数据输出，每个数据输出包含存在于通道输入中的选定频率的幅度和相位信息。 为了增强信号检测和最小化信号强度波动，将每个通道FFT的所选频率输出中的每一个与其他通道FFT的每个相同的频率输出进行比较。 诸如移位寄存器的相位补偿装置调整所有相同的FFT输出之间的相位关系，以允许它们的幅度被建设性地添加。 如此产生的各个小计总计为提供表示多径信号能量的组合强度的输出。 特别地，诸如空气 - 海洋或空气 - 接地界面的介质接口在待检测的信号能量的进入方向上产生宽泛的变化。