Applications
Electret materials have found commercial and technical interest. For example, they are used in electret microphones and in copy machines. They are also used in some types of air filters, for electrostatic collection of dust particles, in electret ion chambers for measuring ionizing radiation or radon and in Vibration Energy Harvesting. See U.S. Patent 6,969,484 for "Manufacturing Method and Device for Electret Processed Product"
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