| 摘要 |
A transducer ( 1 ) includes a transducer axis ( 2 ), a membrane ( 3 ), a magnet system ( 6 ) having an outer magnet system part ( 7 ) and an inner magnet system part ( 8 ), a moving coil configuration ( 27 ) connected to the membrane ( 3 ) and having a coil carrier ( 28 ) and a moving coil ( 29 ) held by the coil carrier ( 28 ) in an air gap ( 14 ) between the two magnet system parts ( 7, 8 ), and guides ( 36 ) for rectilinearly guiding the moving coil configuration ( 27 ) parallel to the transducer axis ( 2 ). The moving coil configuration ( 27 ) has a cylindrical boundary surface ( 42 ) which, together with a cylindrical boundary surface ( 15 ) of the outer magnet system part ( 7 ), delimits a cylindrical gap ( 43 ) which is acoustically impermeable above a lower limit frequency of at most 100 Hz.
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