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Консультация № 197339
07.12.2019, 21:51
0.00 руб.
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1
1
Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
Два звука в некотором газе отличаются по уровню громкости на L12 = 20,0 дБ. Найти отношение амплитуд колебаний давления (dр)m для этих звуков.
Два звука в некотором газе отличаются по уровню громкости на L12 = 20,0 дБ. Найти отношение амплитуд колебаний давления (dр)m для этих звуков.
Обсуждение
12.12.2019, 03:55
общий
это ответ
Здравствуйте, оксана!
Если уровень громкости измеряется в децибелах, то для двух звуковых волн с интенсивностью I[sub]1[/sub] и I[sub]2[/sub] имеем
откуда
Так как интенсивность звука связана со звуковым давлением p и акустическим сопротивлением z[sub]A[/sub] соотношением
то из
следует
Таким же будет и отношение амплитуд колебаний давления, поскольку p[sub]m[/sub] = p[$8730$]2.
Если уровень громкости измеряется в децибелах, то для двух звуковых волн с интенсивностью I[sub]1[/sub] и I[sub]2[/sub] имеем
откуда
Так как интенсивность звука связана со звуковым давлением p и акустическим сопротивлением z[sub]A[/sub] соотношением
то из
следует
Таким же будет и отношение амплитуд колебаний давления, поскольку p[sub]m[/sub] = p[$8730$]2.
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