Here a male warns off a rival with an complex signal said to resemble passing clouds.

One can then extend this information to visualize the filter's response to more complex signals.

All those complex visual signals require a lot of processing power, far more than would be needed if just points were being processed.

In this way a complex signal can be carried by a simple wave.

To accommodate those complex signals, the company says, additional memory and processing speed would have to be built into the boxes, raising the cost.

This will have its most deleterious effect on the high frequency components of a complex signal.

Soon these gave way to more complex signals, at many frequencies-ultraviolet, infrared, X rays.

However, these were not complex signals; smoke simply told others where one was located.

Polyandrous species are also more likely to have females with complex sexual signals such as ornaments.

More complex signals may need some conditioning to make them suitable for counting.