search:聲納 頻率相關網頁資料

      • www.acousticecology.org
        Mass stranding and mortality events coincident with mid-frequency sonar training exercises (NATO and US) have occurred (though not always with clear causal proof) in the Canary Islands (2004, 2002, 1989, 1986, 1985); Madeira (2000); Spain (2006); the U.S
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      • www.yourdictionary.com
        an apparatus that transmits high-frequency sound waves through water and registers the vibrations reflected from an object, used in finding submarines, depths, etc. Origin of sonar
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    日期:2024-08-09
    SQS-23低頻艦首聲納. 這是美國海軍較早期的艦首低頻聲納,基本頻率為4500、 5000及5500HZ。早期型的SQS-23在海底 ......
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    日期:2024-08-05
    ATAS(V)3的主動聲納部分頻率為3.5KHz,仍算不上真正的極低頻。然而其整個系統 架構,尤其是能克服方位問題的聽音 ......
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    日期:2024-08-08
    艦艇利用聲波反射原理測量水深的儀器。使用20千赫以上超聲波來探測魚群、海底 深度,可是有些海中動物(ex.海豚) 的聽覺 ......
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    日期:2024-08-05
    声波(介于20赫与20千赫间),在水中穿透性好,频率越高穿透性越差,超声波也可用, 穿透性较声波为差,按理 ......
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    日期:2024-08-04
    高频率和高分辨率声纳. 360°全方位声纳. 90°垂直模式. 114 kHz 的操作频率. 窄 波束. 调频FM传输. 广大动态范围. 高清晰度....
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    日期:2024-08-09
    声纳工作频率低于1000赫兹,发射声源级为200分贝,拖曳深度50~250米,探测 距离超过第一会聚区,达30海里以上。...
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    日期:2024-08-08
    Project ARTEMIS was a one-of-a-kind low-frequency sonar for surveillance that was deployed off Bermuda for several years in the early 1960s. The active ......
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    日期:2024-08-07
    The Navy's need to conduct training exercises using mid- and low-frequency sonar has generated concern among environmental groups about the potential ......