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The common type of loudspeaker that uses a magnetic field to move a cone-shaped diaphragm. When alternating current (the audio signal) is applied to the coil, the diaphragm vibrates and causes air to ...

Rachel Williams has been an editor for nearly two decades. She has spent the last five years working on small business content to help entrepreneurs start and grow their businesses. She’s well-versed ...

James Chen, CMT is an expert trader, investment adviser, and global market strategist. Erika Rasure is globally-recognized as a leading consumer economics subject matter expert, researcher, and ...