Mass-on-spring system is the default technical method of vibration isolation, isolation from footfall, seismic type vibration including traffic, subways and the like, even wind if one's abode is on one of the upper floors of a highrise. Mass-on-spring devices can range from the mid as to the sublime, from bicycle inner tubes to squash balls to Bungee cords to Vibraplane, Minus K and other more complex and pricier devices. It is with these very low frequency devices we discover the unadvisability of very low frequency vibration.