Power
Power is a measure of energy shared between systems per unit of time. The unit for power is the Watt
. In these lectures, the power is denoted
. The instantaneous power corresponds to the time derivative of the energy
:
.
It is often useful to calculate the average power
over the observation time
:
.
For the three domains that interest us in this lecture, the instantaneous power is defined by the product of the following quantities:
Electrical power:
Mechanical power:
Acoustical power:
