Читать книгу Engineering Acoustics - Malcolm J. Crocker - Страница 90
Solution
ОглавлениеThe difference in levels is 0 dB; thus the total sound pressure level is 80 + 3 = 83 dB.
The difference in levels is 0 dB; thus the total sound pressure level is 80 + 3 = 83 dB.
