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22 Cards in this Set
- Front
- Back
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Force |
F = ma |
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Pressure |
p = F/S |
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Energy |
E = Fd |
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Power |
W = E/t |
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Intensity |
I = W/S |
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Wavelength, Frequency, and Speed of Sound |
λf = c |
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Frequency |
f = 1/T |
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Loudness Intensity |
L_I = 10log(I/I_ref) |
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Intensity Reference |
I_ref = 10^-12(W/m^2) |
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Sound Power Level |
L_W = 10log(W/W_ref) |
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Power Reference Level |
W_ref = 10^-12W |
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Sound Pressure Level |
L_p = 10log(p/p_ref)^2 = 20log(p/p_ref) |
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Pressure Reference Level |
p_ref = 2*10^-5(N/m^2) |
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Doubling Distance in a Free Field |
∆L_p = 20log(r_1/r_2) |
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2D Wave Equation |
∂^2*y / ∂t^2 = c^2*(∂^2*y / ∂x^2) |
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Wavefunction on String traveling Right |
y(t,x) = f(t – x/c) |
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Speed of Sound on String |
c = √(T / p) |
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fundamental frequency of symmetrical 1D system |
f_0 = c/2L |
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fundamental frequency of asymmetrical 1D system |
f_0 = c/4L |
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frequency for room modes |
f_n = c/2 * √( (n_x/l_x)^2 + (n_y/l_y)^2 + (n_z/l_z)^2 ) |
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Equivalent room absorption |
A = ∑α_i * S_i |
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Sabine's formula |
T_60 = 4ln10^6 (V/cA) ≈ V/6A, in SI units |
