Directory enquiries (...) taking olanzapine recreationally The speaker consists of two layers of saltwater gel sandwiched around a thin rubber sheet. When a high enough voltage is passed through the gel it causes the rubber to contract and vibrate, playing the music in the video. It's actually capable of producing every frequency in the audible spectrum, from 20Hz to 20KHz. (...)

Directory enquiries (...) taking olanzapine recreationally The speaker consists of two layers of saltwater gel sandwiched around a thin rubber sheet. When a high enough voltage is passed through the gel it causes the rubber to contract and vibrate, playing the music in the video. It's actually capable of producing every frequency in the audible spectrum, from 20Hz to 20KHz. (...)

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