In Reply to: Re: Simple Technical Question posted by TomLarson on March 2, 2007 at 11:18:23:
Yes, amplitude is just loudness.Frequency is a way to describe the change in loudness over a period of time. Thus, at any single point, there is no frequency to the signal, only volume, loudness, amplitude, level- whatever word you want to use.
If you look back at a time period where the signal loudness changed over time, this could be 1 second, 1 minute, 10 minutes. And then you ask the question, how do I describe how the signal changed over that time period.
And the best way is a decomposition into various frequency components. That decomposition describes completely the time behavior of the signal.
Maybe the frequency content is ultra-simple, say a 1 Hz sine wave with a peak of 1 Volt. This simple frequency description is enough to describe the waveform at every point in the entire interval.
That's what frequency is. It has no meaning at a single point.
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Follow Ups
- Re: Simple Technical Question - tunenut 12:07:29 03/02/07 (0)