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雅雲 asked in 社會與文化語言 · 1 decade ago

超音波的名詞解釋

echolucency?

3 Answers

Rating
  • 1 decade ago
    Favorite Answer

    英文:ultrasonic (waves); supersonic (waves)

    國語解釋:人耳所能聽到的聲波頻率在二十赫到兩萬赫之間,

    故稱頻率高於兩萬赫的聲波為「超音波」。

    超音波的波長比普通音波短,在空氣中易被吸收,

    因此傳播距離短。由於它的定向性較好,

    近來被廣泛用於魚群、冰山、潛艇、深水、金屬缺陷及人

    體病理的偵測上。亦稱為「超聲波」。

    Source(s): 教育部辭典 yahoo
  • 1 decade ago

    thank you, though these are not the answer i want.

  • 1 decade ago

    ultrasonic (waves); supersonic (waves)

    Source(s): yahoo字典
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