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Консультация № 195807
05.06.2019, 10:00
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Здравствуйте! Прошу помощи в следующем вопросе:
Звук частотой n=200 Гц проходит некоторое расстояние в поглощающей сре-де. Интенсивность звука при этом уменьшается с I1=10-4 Вт/м2 до I2=10-8 Вт/м2. На сколько при этом уменьшится уровень громкости?
Звук частотой n=200 Гц проходит некоторое расстояние в поглощающей сре-де. Интенсивность звука при этом уменьшается с I1=10-4 Вт/м2 до I2=10-8 Вт/м2. На сколько при этом уменьшится уровень громкости?
Обсуждение
05.06.2019, 15:50
общий
это ответ
Здравствуйте, Babklo!
Согласно формуле (7.3) [1, с. 119], уровни интенсивности звука составляют
(дБ);
(дБ).
По рис. 7.3 [1, с. 117] устанавливаем, что при
Гц уровням интенсивности 
дБ и 
дБ соответствуют уровни громкости 
фон и 
фон. Значит, уровень громкости уменьшится на 
фон.
Литература
1. Лещенко В. Г., Ильич Г. К. Медицинская и биологическая физика. -- Минск: Новое знание, 2012. -- 552 с.
Согласно формуле (7.3) [1, с. 119], уровни интенсивности звука составляют
(дБ); (дБ).По рис. 7.3 [1, с. 117] устанавливаем, что при
Гц уровням интенсивности дБ и дБ соответствуют уровни громкости фон и фон. Значит, уровень громкости уменьшится на фон.Литература
1. Лещенко В. Г., Ильич Г. К. Медицинская и биологическая физика. -- Минск: Новое знание, 2012. -- 552 с.
Об авторе:
Facta loquuntur.
Facta loquuntur.
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