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1 усреднённая разность
Mathematics: averaged differenceУниверсальный русско-английский словарь > усреднённая разность
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2 средняя по направлениям разность уровней скорости
3.7 средняя по направлениям разность уровней скорости (direction-averaged velocity level difference) Dv,ij, дБ: Величина, рассчитываемая по формуле
(11)
где Dv,ij- разность уровней скорости элементов i и j при возбуждении элемента i, дБ;
Dv,ji - разность уровней скорости элементов j и i при возбуждении элемента j, дБ;
Источник: ГОСТ Р ИСО 10848-1-2012: Акустика. Лабораторные измерения косвенной передачи воздушного и ударного шума между смежными помещениями. Часть 1. Основные положения оригинал документа
Русско-английский словарь нормативно-технической терминологии > средняя по направлениям разность уровней скорости
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