Apple loves throwing round buzzwords in product reveals and spec sheets, and one which caught a couple of eyes was using ‘force-canceling‘ in the new iMac‘s sound systems. Apple claims these are the best speakers in an iMac yet, but what does a force-canceling woofer actually mean? Is that some kind of Jedi fighting space dog?
It’s nothing fairly as sci-fi as Star Wars. Force-canceling woofer preparations are pretty frequent in high-end audio, and whereas they’re removed from a assure of fine sound high quality, they do theoretically supply some advantages.
The fundamental concept behind force-canceling woofers is to eradicate undesirable vibrations by having two woofers firing in reverse instructions and excellent unison.
Remember Newton’s third legislation? For each motion, there may be an equal and reverse response. When a woofer strikes, the ‘reaction’ has to go someplace — normally as stray vibrations within the woofer’s enclosure.
These vibrations can result in the enclosure rattling and radiating undesirable sound. In massive drivers, like these in a subwoofer, it could even trigger a speaker to maneuver across the flooring. By inserting one other woofer that fires in the wrong way, the reactive forces are capable of largely cancel one another out.
So why would you need force-canceling woofers in your gadegts? Well, when you’ve ever felt like your laptop or telephone sounds muddy and rattles when enjoying bass, these extraneous vibrations are sometimes a wrongdoer.
In concept — no person has really heard the brand new iMac but — the configuration might assist forestall these artefacts and decrease distortion.
In hi-fi audio system, it’s also possible to take care of vibrations by making a dense cupboard with dampening supplies or rigorously chosen geometry, however one can’t count on the identical from a multi-function system just like the iMac.
None of this ensures the brand new iMac will really sound any good, however hey, now you already know. For a extra technical clarification — and to see what a force-canceling setup seems to be like in some hi-fi audio system, you may try the under explainer by Soundstage Network and audio researcher Jack Oclee-Brown.
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