{"id":1994,"date":"2010-04-06T19:24:58","date_gmt":"2010-04-06T17:24:58","guid":{"rendered":"http:\/\/www.maurograziani.org\/wordpress\/?p=1994"},"modified":"2025-08-22T18:15:33","modified_gmt":"2025-08-22T16:15:33","slug":"the-power-of-the-slinkies","status":"publish","type":"post","link":"https:\/\/maurograziani.org\/wordpress\/archives\/1994","title":{"rendered":"The Power of the Slinkies"},"content":{"rendered":"

\"Slinky\"For italian people:<\/p>\n

Slinky \u00e8 il nome commerciale di questo giocattolo, formato da una lunga molla elicoidale, in voga (boh) forse 20-30 anni fa (\u00e8 stato inventato negli anni ’40; io ne ho almeno 4\/5, ma non ricordo quando le ho comprate).<\/p>\n

Vedi anche wikipedia<\/a>.<\/p>\n

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A sound wave in a long wire travels back and forth and produces an echo effect. This fact was well known to the old sound engineers and the so called spring reverberator<\/em><\/a> was largely used in the analogical era.<\/p>\n

In this video micolich<\/a> shows the power of long springs. When touched, the sound travels repeatedly along the whole length of the spring producing a stream of little echoes with decreasing amplitude. But the sound speed is high, so the time distance between echoes is a question of milliseconds. As result we can’t perceive the single echo, but a decreasing halo that extend the sound: this is the reverberation.<\/p>\n