雨滴の大きさの違いを捉える雨音の簡易観察装置の開発  [in Japanese] Development of a Simple Device Observing Sounds of Rain for Recognizing Differences in Raindrop Size  [in Japanese]

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Abstract

<p>児童生徒が雨音に対して持つ主観的な感覚と,客観的データである雨滴の大きさや雨の強さとの関連づけを図る,雨音の簡易な観察装置を製作した.この装置では,雨滴を厚さ2 mmのステンレス板で受け,その衝突音をポータブルメディアプレーヤーとステレオコンデンサーマイクで録音する.球等価直径2.1~5.4 mmの水滴を高さ13.2 mから滴下し,観察装置に衝突させる屋外実験を行った.その結果,水滴の衝突音はその直径とともに明らかに大きくなった.加えて,学校での授業実践を想定して,水滴を高さ1 mから滴下する実内実験を行った.室内実験では屋外実験と同様の結果が得られた.したがって,本装置を雨滴の大きさの違いを捉える教材として活用できると結論づける.</p>

<p>A simple device observing sounds of rain was developed to correlate the subjective senses of pupils for sounds of rain with objectively measured raindrop sizes and rainfall intensities. In this device, raindrops impact a stainless steel sheet of 2 mm in thickness, and the impact sounds of raindrops are recorded using a portable media player and a stereo condenser microphone. An outdoor experiment to let water droplets of 2.1–5.4 mm in equivalent spherical diameter dropped from a height of 13.2 m collide with the device was conducted. The experiment demonstrated that the impact sounds of water droplets clearly increased with an increase in their diameter. In addition, a school laboratory experiment in which water droplets are dropped from a height of 1 m was conducted. The experiment showed similar results to those of the outdoor experiment. We concluded, therefore, that it is possible to utilize our device as a teaching and learning material that recognizes the differences in raindrop size.</p>

Journal

  • Education of Earth Science

    Education of Earth Science 70(1), 1-13, 2017

    Japan Society of Earth Science Education

Codes

  • NII Article ID (NAID)
    130007439033
  • NII NACSIS-CAT ID (NCID)
    AN00141043
  • Text Lang
    JPN
  • ISSN
    0009-3831
  • NDL Article ID
    028389028
  • NDL Call No.
    Z15-168
  • Data Source
    NDL  J-STAGE 
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