Lesson Plan for Making a Speaker Laboratory - StumbleUpon. ©1995 The Regents of the University of California by Regan Lum Introduction: A speaker is a device that converts an electronic signal into sound.
The speaker you will build (see figure 1) consists of a Styrofoam or paper cup, a coil of wire, a permanent magnet, and a signal source. The electronic signal goes through the coil and creates a varying electromagnet. Hapuriainen on deviantART. Operation Beautiful. The World's #1 Harry Potter Site - Deathly Hallows Movie, The Wizarding World, JK Rowling, and much more. FOUND Magazine. 15 Different Ways To Tie Your Sneakers Pictures. Changes-channels.jpg (JPEG Image, 425x294 pixels)