These effects, however, have been observed in only a few individual cases.

The effect of dark matter is observed far and wide.

Its effects are easily observed such as light and heat.

This effect has also been observed with students using a shared system.

The effect has also been observed and put to use in synthetic systems.

The effect can be simply observed by using a laser.

This effect has been observed to continue across three generations.

The effect was first observed during an eclipse of the Sun.

So, the thermal effects of sound cannot be observed in daily life.

As of April 2008, the effect has not yet been observed independently.