Perl 6 - the future is here, just unevenly distributed

IRC log for #perl6-noise-gang, 2016-10-19

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Time Nick Message
06:21 RabidGravy joined #perl6-noise-gang
07:52 lizmat joined #perl6-noise-gang
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20:30 nine joined #perl6-noise-gang
20:31 nine This isn't Perl 6 related at all, but maybe someone here's interested:
20:33 nine When shopping for new speakers I started wondering. The usual way is to take the (electrical) audio signal, amplify it and use that to drive an electromagnet which moves the actual driver consisting of a membrane and a solid magnet.
20:34 nine The membrane and magnet are usually built as light as possible to reduce inertia. They are mounted in a rubber frame carefully optimized to have a resonance frequency outside the speaker's inteded range.
20:35 nine This is where all the high tech and research goes into but it's been essentially the same for half a century.
20:35 timotimo so you're suggesting to build a speaker made of a bunchton of little speakers with each having a different resonance frequency?
20:36 nine In short: we take an unmodified audio signal and try to minimize the accoustic side effects of the mechanics.
20:36 nine I wonder, why not instead modify the signal itself, before it enters the speaker. The physical properties of the speaker are very well known.
20:37 nine To counter inertia, one can simply boost the signal and use a higher force to move the membrane. To counter resonance one can inject an opposite wave into the signal.
20:38 nine The signal boosting is for example used in LC displays where the crystals have kind of an inertia, too. So you use a stronger initial force to get them moving faster and then scale it down so you won't overshoot.
20:39 nine This seems so simple and obvious to me that I really wonder why no one seems to have tried this so far. There must be a catch that I'm overlooking.
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