Loudspeaker having electrically conductive membrane transducers
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United States of America Patent
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Mar 20, 2018
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app pub date -
Feb 5, 2016
filing date -
Feb 6, 2015
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Abstract
An improved loudspeaker having pump cards that include an array of electrically conductive membrane transducers (such as polyester-metal membrane pumps). The array of electrically conductive membrane transducers combine to generate the desired sound by the use of pressurized airflow. The array of electrically conductive membranes has a total membrane area that is at least five times larger than the face area of the loudspeaker. In some embodiments, the loudspeaker includes a dynamic DC bus controller that maintains the DC bus level slightly above the inverter output (audio signal).
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