Other instruments on the sled measure water levels, wave frequency and even bubbles in the water.

We hear different sounds from different vibrating objects because of variations in the sound wave frequency.

Short wave frequencies vary according to time of day.

Materials which do not allow the transmission of any light wave frequencies are called opaque.

Their ships, programmed to follow the lichen, achieved the wave frequency of light, cutting them off from one another.

The highest wave frequency and motility index were noted in the postprandial period.

Rogers explained that higher wave frequencies are associated with accelerating human development.

The amplifier was not breaking up its wave frequency, and the transmitters were stable.

Shortly after sundown, said the news report, a call had come through on a military short wave frequency.

A higher wave frequency simply means that the air pressure fluctuation switches back and forth more quickly.