PRINCIPALI GRANDEZZE ACUSTICHE - Studium

Combining coherent acoustic signalsTwo acoustic signals, at a given position, are in antiphase.One has an Rms pressure of 4Pa and the other an Rms pressure of 3Pa.What are the SPL of the individual waves and of the resultant waves?⎛ 4 ⎞L1 = 20×Log10⎜⎟ = 106dB−5⎝ 2×10 ⎠⎛ 3 ⎞L2 = 20×Log10⎜ ⎟ = 103. 5dB−5⎝ 2 × 10 ⎠p 1T= p1 − p2= 4 − 3 = P a⎛ 1 ⎞L T= 20×Log10 ⎜ ⎟ = 94dB−5⎝ 2×10 ⎠