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A ferrite bead creates a low value inductor; a wound choke can be much higher value. You are dealing with KHz rather than MHz range, so a proportionally higher value choke is likely appropriate.You mentioned a choke; are you thinking pure inductance would be more appropriate than a ferrite bead?
The impedance can be high enough that the high frequency content never passes through it, with little effect on the DC power.
The series resistor reduces the chance of it resonating with the regulator caps and causing a problem itself..
However, a series schottky diode would prevent the regulator input being pulled down by noise on B+; but could pass positive spikes, so a low value resistor as well is probably still needed to limit their effect.
I did not mention a diode as I thought the regulator input may be a bit close to limits with a low battery.