Читать книгу Engineering Acoustics - Malcolm J. Crocker - Страница 92

The difference in levels is 3 dB; thus the total sound power level is 73 + 1.8 = 74.8 dB.

Figure 3.6 and these two examples do not apply to the case of two pure tones of the same frequency.

Note: For the special case of two pure tones of the same amplitude and frequency, if p₁ = p₂ (and the sound pressures are in phase at the point in space of the measurement):

(3.28)