6.3. Electro-mechano-acoustical circuit
Before drawing a circuit diagram for a loudspeaker, we must identify the various elements involved. The voice coil has inductance and resistance, which we shall call L
, respectively. The diaphragm and the wire on the voice coil have a total mass M
. The diaphragm is mounted on flexible suspensions at the center and at the edge. The total effect of these suspensions may be represented by a mechanical compliance C
and a mechanical resistance R
, where G
is the mechanical conductance. The air cavity and the holes at the rear of the center portion of the diaphragm form an acoustic network which, in most loudspeakers, can be neglected in analysis because they ...