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Samples in periodicals archive:
Built-in automatic low frequency vibration suppression meets the needs of applications such as crane control.
We aimed at studying low frequency vibration to enhanced oil production which relies on the utilization of surface-based vibro-energy sources.
The modules are suitable for acceleration, tilt, and low frequency vibration sensing, as well as for human input applications.
With very low frequency vibration the ear starts becoming inefficient and the rest of the body's sense of touch starts to take over.
There are not many wind farms in the UK so close to a large conurbation and it is disturbing to reflect that a Keele University report last month told us, 'We have clearly shown that both fixed speed and variable speed turbines generate low frequency vibrations which are multiples of blade passing frequencies and can be detected by seismometers buried in the ground at significant distances away from wind farms even in the presence of significant levels of background seismic noise (many kilometres).
The energy modes range from subsonic, low frequency vibration (1 to 30 Hz), easily obtained with help of pneumatic piston actuators, through the ultrasonic range of 15 to 20 kHz.
The most immediate effect of low frequency vibration is to lower viscosity, thus increase throughput.
On the other hand, the viscous properties dampen out the low frequency vibrations generated during idling of the engine.