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Reflection, Transmission, Absorption
Discussion
Sound, for example …
- Acoustic impedance, Z = ρv, is important when calculating the amount of reflection and transmission at
an interface. For the reflected portion, notice that when Z2 < Z1, the sign of the reflected portion is negative, which indicates a change of
phase.
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| R/A0 = (Z2 - Z1)/(Z2 + Z1) |
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(reflected pressure amplitude) |
| T/A0 = 2Z2/(Z2 + Z1) |
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(transmitted pressure amplitude) |
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