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Why are Peak filters called "Peak" and why are Shelving filters called "Shelving". I am not a native English speaker. So excuse me if it is so dumb question.

Shelving filter

Peak filter

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up vote 5 down vote accepted

This is probably the craziest, though important question on DSP SE ;) Answer is, because they:

  • look like peak:

enter image description here

  • and tend to have a shelf either in the beginning or the end of frequency range:

enter image description here

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I never thought that the answer would be that simple :) –  zdarsky.peter May 13 at 19:55
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up arrow from me. –  robert bristow-johnson May 14 at 4:15
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Fear of noises... Shelving filters are named to remind audio technologists that most people fear the ocean, i.e., the following picture. Diagram of Continental Shelf

The little it is worth; but note that a summer day spent on the continental shelf is scarier than just about every sound producible by humans. I myself would not have guessed this to be the reason - fear and prayers against devils and demons make up a great deal of the superfluity that is coined into terminology.

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up arrow from me. $$ :-) $$ –  robert bristow-johnson May 16 at 4:41
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