Disclaimer
The subject of psycho / physio-acoustic cannot be discussed alone, one need to know the entire acoustics to fully realize its functions and importance.
Unfortunately there is a time limit to this presentation and therefore not everything can be shown, only the summary is introduced.
Please refer to the appropriate textbooks for further details and clarification.
Finally try to think of time & f as a whole and think in conjunction with previous knowledge.
Many things are overlapping and makes understanding difficult. Please bare with me.
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