Active sonar
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A sonar that emits a pulsed sound wave and measures the distance to a target from the time and intensity it takes for the wave to reflect off a ship, a school of fish, or the undersea topography and return. Also, its detection method. ⇔ Passive sonar. Source: About Shogakukan Digital Daijisen Information | Legend |
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パルス状の音波を発し、船舶・魚群・海底地形などに反射して戻ってくるまでの時間や強度から、対象物までの距離などを測定するソナー。また、その探知方式。⇔パッシブソナー。
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