Talk:Analog signal

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Do we want articles that aspire to sounding erudite? Articles that are comprehensive to the point of being chopped hash? These are the properties found in standard encyclopedias. We can be different by having plain, clear explanations.

Correction
It was formerly asserted that a microphone's operating mechanism is a variance of current caused by sound pressure. This is technically incorrect (compare Microphone), since it is not current that varies with the sound pressure, but voltage. I've made this correction in the article. HarmonicSphere 03:03, 2 February 2006 (UTC)

...Unless you are talking about a carbon microphone&mdash;still found in older telephone sets&mdash;A carbon microphone effectively is a resistor whose value varies with sound pressure. When a carbon microphone is placed in a circuit that is supplied by a constant-voltage source (e.g., a battery), then the current in that circuit that will fluctuate in response to sound pressure fluctuations. Drondent 00:35, 18 July 2007 (UTC)


 * To be strictly accurate, a varying magnetic field induces a current in a coil of wire.  All microphones that employ an electromagnetic principle thus induce a current in the electrical conductor be it a coil or a ribbon.  The only reason that a voltage also occurs is because the current is passed through a load resistor of some sort.  The only type of microphone that directly produces voltage variations that leaps to mind is the condensor microphone which requires an electrometer type circuit to produce a useable signal.  The article was originally correct and I have corrected the error 20.133.0.13 (talk) 08:21, 9 September 2009 (UTC)


 * There is no longer a mention of microphones in the article. ~Kvng (talk) 18:46, 7 May 2022 (UTC)

I'd like to add that it might be misleading to say that digital signals require more bandwidth. Digital signals, being representative, can be subject to compression. For example, the mathematical equation of a long sine wave would require far less bandwidth to transmit than the actual sound, and it's resolution is limited only by the hardware decoding/converting it. This is why digital television channels have far greater quality to bandwidth ratios than analog ones. — Preceding unsigned comment added by 74.243.110.209 (talk) 01:34, 4 May 2012 (UTC)


 * There is no longer a mention of bandwidth in the article. ~Kvng (talk) 18:46, 7 May 2022 (UTC)

Added wikilinks
I made the anon changes, forgot to log in

Modem
There is an obvious problem on Modem that most people think a Modem converts digital signals to analog signals. The modem article is already too long to include a tutorial on the difference between analog and digital signals, and there isn't any good place to reference -- so any suggestions would be welcome.203.206.162.148 (talk) 08:01, 8 September 2010 (UTC)