Experimental Approach to Active Mounts Using Electromagnetic Actuator and Rubber with Consideration of Shock Resistance for Naval Shipboard Equipment

Table 9

Measurement results of vibration reduction when applying the hybrid mount.

#	Frequency (Hz)	Passive (dB)	Active (dB)	Difference (dB)
Set #1	30 Hz	45.5	20.9	24.6
	60 Hz	65.5	39.0	26.5
	90 Hz	57.7	37.3	20.4
Set #2	90 Hz	57.5	28.0	29.5
	180 Hz	72.7	32.9	39.8
	270 Hz	86.5	44.8	41.7