6 Electromechanical Analogies
Summary of Analogue Quantities, Units, Symbols and Relationships
The table below gives the overall units and dimensions:
Mechanical |
Acoustic |
Electrical |
Mass, M (kg) |
Mass, M_{a}, Inertance |
Inductance, H, (Henry) |
Force, F (N) |
Sound pressure, p |
Volts (V) |
Displacement, x (m) |
– |
Charge Q (C) |
Velocity, x˙ (m/s) |
Volume velocity |
Current (Q/s,A),i |
Energy, work (J) |
joules (J) |
joules (J) |
Power (W, J/s) |
watts (W) |
watts (W) |
Stiffness, F/x |
– |
– |
Compliance, x/F |
Compliance, C_{a} |
Capacitance, C |
Frequency, f (l/s,Hz) |
– |
– |
Resistance, R_{m} |
Acoustic resistance, R_{a} |
Resistance R |
Temperature (K) |
– |
Magnetic flux density, B |
Length, L |
– |
– |
Impedance relationships
Mechanical impedance,
Specific acoustic impedance, ...
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