Frequency transported via electric cable


Newbie here, a (home-made) computer technician.

So here is my question, frequency (megahertz) is not electric? But sound waves? Is this correct? A close friend, an electrical engineer, explained to me that broadband megahertz was a type of audio, and is transported through electric cabling on the outer of the cable? i.e. he said that the broadband (term) is sent by module, spiraling constantly and is received after many relays at the other end by another module. i.e. modem/router, or other device. Is this accurate? This is laymans terms, he said it is megahertz and should not be confused with electric, which in general is measured by amperes, voltage and ohms, and of course the usage in watts or kilowatts.

The basic question: Frequency is or is not electric?

Best Answer

Frequency is just how often something happens. It may be electrical in nature, or how often your local police officer visits the bakery for a doughnut.

"The square wave is 42 kHz."

This would most likely be someone describing an electrical signal, saying that it happens 42 thousand times per second.

"That tone is over a thousand cycles per second."

This would be describing sound, waves of air pressure.

"He gets a doughnut about once a week."

And this is describing the frequency with which someone does a particular thing.

In both audio and electrical applications, frequency is usually measured in Hertz which means "times per second." The SI prefixes such as kilo, mega, and giga can be applied to multiply by one thousand, one million, or one billion, respectively.

So, no, frequency is not always electrical in nature.

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