Discover how frequency combs, specialized lasers with evenly spaced frequencies, enable precise light frequency comparison and scientific measurements.

Radio telescopes are instruments that capture faint radio signals from space and convert them into images of celestial bodies ...

The disc-shaped resonator measures less than 2 centimeters across, yet the innocuous device is eavesdropping on spacetime. It’s a newly built acoustic wave resonator, and in its first 153 days of ...

Sound can be represented with both analog or digital audio signals. Analog audio signals use electrical voltage levels. Different types of transducers convert sound to electrical signals and ...

A software-defined radio (SDR) uses a general-purpose computer processor to perform aspects of digital signal processing in place of analog circuit hardware. This allows for greater flexibility in ...