Shelving and Peak filters name

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.

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

• look like peak:

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

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I never thought that the answer would be that simple :) –  zdarsky.peter May 13 at 19:55
up arrow from me. –  robert bristow-johnson May 14 at 4:15

Fear of noises... Shelving filters are named to remind audio technologists that most people fear the ocean, i.e., the following picture.

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