The former detects high frequencies and the latter low frequencies.

Our eyes detect different frequencies as different colors.

Most noise-canceling headphones have an internal microphone to detect certain frequencies of environmental noise in the background.

Designed to transmit radio messages as well as receive, the device could also detect most frequencies that escaped conventional radio equipment.

Older adults in their 70s require about three times for more contrast to detect high spatial frequencies than young adults in their 20s.

They can detect frequencies beyond 100 kHz, possibly up to 200 kHz.

Female flies of the genus Ormia ochracea possess organs in their bodies that can detect frequencies of cricket sounds from meters away.

Many flying mantids have evolved a highly sensitive ear which is capable of detecting ultrasonic frequencies emitted by bats using echolocation.

Next year, with new radio receivers, they expect to detect higher frequencies for even more sensitive velocity measurements of material orbiting these stars.

In the early 1970s, researchers noted that while humans could detect frequencies below 20 Hz, the ear was much less sensitive to these frequencies.