The Haier loudspeaker is a loudspeaker of the inventor's name of Dr. Haier in the United States. It was introduced in 1973. It folds the diaphragm into a pleated shape. The diaphragm does not oscillate back and forth, but vibrates like the accordion bellows in the lateral direction of the sound wave radiation. A special structure of electric speaker, it is mainly used for high frequency.
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