ACOUSTIC TRANSDUCERS WITH POLE PLATES
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United States of America Patent
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Issued Date -
Nov 25, 2021
app pub date -
Feb 26, 2018
filing date -
Feb 26, 2018
priority date (Note) -
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Abstract
An example acoustic transducer device includes a magnet and a pole plate connected to the magnet. The pole plate includes a nickel-iron alloy having nickel as a principal component. The device further includes a diaphragm movable relative to the pole plate to generate a sound and a coil connected to the diaphragm. The coil is to extend into a gap at the pole plate. The coil is to magnetically interact with a magnetic field provided to the gap by the magnet and the pole plate to drive the diaphragm.
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