THE recent discovery of solar radio noise ... radiations the maximum wave-lengths of which are comparable to stellar dimensions. Such low-frequency radiation will escape from the sun in the ...

For water waves and sound waves the unit hertz is usually good enough but radio and TV waves have such a high frequency that the kilohertz (\(kHz\)) or even the megahertz (\(MHz\)) are better units.

Ultrasound waves are longitudinal waves just like sound waves, and they cannot pass through a vacuum. Ultrasound waves have a frequency above 20 000 Hz, other than that they are like sound waves ...

The difference is in how the carrier wave is modulated, or altered. With AM radio, the amplitude ... is varied to incorporate the sound information. With FM, the frequency (the number of times ...

This is the frequency of the wave. Morrison and Cocconi considered how well the types of electromagnetic waves passed through interstellar space. While space is usually described as a vacuum, it does ...

AM, or amplitude modulation, was the earliest way of sending voice over radio ... a pure sine wave with the equation: S(t) = A sin(2*pi*F*t) where A is amplitude, F is the frequency in Hertz ...

And now, they too have been sonified. To be clear, these data were not sound waves to start with, like the Perseus audio, but ...

Receiving frequency-modulated radio waves is typically more difficult than their amplitude-modulated cousins because the circuitry necessary to demodulate an FM signal needs a frequency-to-voltage ...

These ‘chorus waves’ have been observed by radio receivers at the ... and have a characteristic rising frequency 2, which gives them their chirping sound. Each burst is slightly different ...