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I Units of Amplitude

  1. Dec 1, 2016 #1
    for (int n = 0; n < 52920; n++){
    F = Amplitude * sin(2 *pi*n* Frequency/44100) ;
    what are the units of Amplitude ?
    I know Frequency is in Hz
    also what are the unit of F?
  2. jcsd
  3. Dec 1, 2016 #2


    Staff: Mentor

    It appears to be an expression for the instantaneous values of something which varies sinusoisally. But without know what that thing is, we can't tell the units.

    It could be a swing. It could be electrical current, or voltage or power. It could be the height of a liquid. It could be almost anything.
  4. Dec 1, 2016 #3


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    Staff: Mentor

    The sine doesn't have units, so F and Amplitude have the same units. But what those units are, depends on what physical quantity you're describing, as anorlunda said.
  5. Dec 1, 2016 #4
    what if it is a sound wave?
  6. Dec 1, 2016 #5


    Staff: Mentor

    That's still not enough. You're not going to get anywhere asking people to guess.

    Does the signal come from a microphone or a pressure sensor? Information like that will provide your answer.
  7. Dec 1, 2016 #6
    so that signal I posted, is just a sinewave I make up. I did not get it from anywhere...
  8. Dec 2, 2016 #7


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    Science Advisor
    Gold Member
    2017 Award

    So there is no answer to your question. :smile:
  9. Dec 3, 2016 #8


    User Avatar
    Science Advisor

    Then you can make up the units as well.
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