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Консультация № 195383
24.04.2019, 22:30
0.00 руб.
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1
Здравствуйте! У меня возникли сложности с таким вопросом:
Определите среднюю силу, действующую на барабанную перепонку человека при разговоре, когда уровень интенсивности звука достигает 60 дБ. Считать площадь барабанной перепонки 66 мм2. Плотность воздуха 1,29 кг/м3, скорость звука в воздухе 330 м/с.
Заранее большое спасибо.
Определите среднюю силу, действующую на барабанную перепонку человека при разговоре, когда уровень интенсивности звука достигает 60 дБ. Считать площадь барабанной перепонки 66 мм2. Плотность воздуха 1,29 кг/м3, скорость звука в воздухе 330 м/с.
Заранее большое спасибо.
Обсуждение
28.04.2019, 07:40
общий
это ответ
Здравствуйте, viktorija79!
Имеем по условию задачи
дБ -- уровень интенсивности звука;
мм2
м2 -- площадь барабанной перепонки;
кг/м3 -- плотность воздуха;
м/с -- скорость звука в воздухе.
В соответствии с данными на страницах 115, 119 [1],
Вт/м2 -- интенсивность звука на пороге слышимости;
где 
-- интенсивность звука; тогда
Вт/м2 -- средняя интенсивность звука при разговоре;
-- среднее звуковое давление при разговоре.
Величина искомой силы составляет
(Н).
Литература
1. Лещенко В. Г., Ильич Г. К. Медицинская и биологическая физика. -- Минск: Новое знание, 2012. -- 552 с.
Имеем по условию задачи
дБ -- уровень интенсивности звука; мм2 м2 -- площадь барабанной перепонки; кг/м3 -- плотность воздуха; м/с -- скорость звука в воздухе.В соответствии с данными на страницах 115, 119 [1],
Вт/м2 -- интенсивность звука на пороге слышимости; где -- интенсивность звука; тогда Вт/м2 -- средняя интенсивность звука при разговоре; -- среднее звуковое давление при разговоре.Величина искомой силы составляет
(Н).Литература
1. Лещенко В. Г., Ильич Г. К. Медицинская и биологическая физика. -- Минск: Новое знание, 2012. -- 552 с.
5
Огромное спасибо! Всё понятно объяснили.
Об авторе:
Facta loquuntur.
Facta loquuntur.
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