Equivalent acoustic parameters
Equivalent parameters given at the previous figure in acoustic domain can be expressed according to given physical parameters as follows:
Element | Electrical parameters | Mechanical parameters | Acoustic parameters |
Resistance |
|
|
|
Inductance |
|
| |
Capacitance |
|
|
where
and c are respectively the air density and the speed of sound in the air,
is a wave number,
and
are the coefficients characterizing an effect of discontinuity between the membrane and the air. In the case of a membrane in infinite screen
and for a membrane in infinite space
. Besides, the source pressure is written as
.
