Hydraulic Lifts
(A) Noise Problems
Air-borne Noise
• Noise generated from the hydraulic lifts may cause noise disturbance to nearby residents. It mainly comes from the noise from the power unit, motor, pump and valves (see Figure 39).
Structure-borne Noise
• Vibration from the vibration impact of the hydraulic lifts may be transmitted through building structure at points where the machine is rigidly fixed to the structure without proper isolation. The vibration transmitted may activate the building structure to generate noise which causes noise disturbance to residents nearby (see Figure 40).
(B) Practical Remedies
Air-borne Noise
• Provide plant room with sound absorptive material for the power unit, motor and pump of a hydraulic lift (see Figure 41).
(Noise Reduction Up to 5 dB(A))
Structure-borne Noise
• Provide inertia block and vibration isolators for the power unit and pump of the hydraulic lift (see Figure 42).
(Noise Reduction Up to 20 dB(A))
