An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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sound intensity
  درتنویی ِ صدا  
dartanuyi-ye sedâ
Fr.: intensité de son  

The average → sound power passing through a unit area perpendicular to the direction that the sound is traveling. It is usually expressed in watts per square meter.

See also: → sound; → level.