| 水中目标辐射噪声特性仿真 |
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| 引用本文： | 朱安珏.水中目标辐射噪声特性仿真[J].声学技术,2004,23(2):128-131. |
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| 作者姓名： | 朱安珏 |
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| 作者单位： | 中科院声学所东海站,上海,200032 |
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| 摘 要： | 文章中讨论了水中目标一船体辐射噪声的特性。运用冲激响应不变法来设计IIR数字一阶低通滤波器，并用此滤波器对高斯白噪声进行滤波，滤波器的输出能很好地模拟船体辐射宽带连续噪声，此输出信号的功率谱在高频端以6dB／oct的斜率下降。运用直接数字信号合成技术产生多个低频线谱信号，并将它与宽带连续噪声相加，从而来模拟船体辐射的低频线谱。
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| 关 键 词： | 船体辐射噪声 线谱 直接数字信号合成 高斯白噪声 |
| 文章编号： | 1000-3630(2004)02-0128-04 |
| 收稿时间： | 2003/5/15 0:00:00 |
| 修稿时间： | 2003/10/14 0:00:00 |
Simulation of radiation noise from underwater targets |
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| ZHU An-jue.Simulation of radiation noise from underwater targets[J].Technical Acoustics,2004,23(2):128-131. |
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| Authors: | ZHU An-jue |
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| Affiliation: | Shanghai Acoustics Laboratory, Chinese Academy of Sciences, Shanghai 200032, China |
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| Abstract: | Characteristics of radiation noise from underwater targets are studied in this paper. An IIR lowpass digital filter designed using the impulse response invariability method is employed to remove white Gaussian noise. The filter output is a good simulation of the radiation noise from a naval ship, and its spectrum has a 6dB/oct slope at higher frequencies. The low frequency line spectra are created with the Direct Digital Synthesis(DDS) method. |
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| Keywords: | radiation noise of ship line spectrum Direct Digital Synthesis |
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