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im confused on how these folks seems to like convert a frequency into a time function, and a time function into a frequency function. i know that time function uses amplitude that varies over time, but i dont understand the mystery of frequency domain. if time has amplitude then frequency has what?

here is a sample image

enter image description here

i still cant get the relevance or the gist between transitioning between time and frequency. thanks

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    I think it just takes some time to get used to imagining superposition of waves of different frequencies (and amplitudes).2013-09-17

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