ELECTRODYNAMIC TRANSDUCER Russian patent published in 1996 - IPC

FIELD: electrical engineering. SUBSTANCE: electrodynamic transducer has cylindrical case 1 with diaphragm 2 and pad 3. Fixed to pad 3 is bottom of cup 4 whose wall carries moving coil 5. Magnetic system has two annular magnets 6 and 7 with core 8 placed between them in a nonspaced relation that carries pole shaders 9 and 10 made of high-conductivity material. Magnets are secured on bottom of cylindrical magnetic circuit 11 so that cup 4 embraces one of magnets on outside and coil 5 is placed in working annular gap formed by core 8 and wall of magnetic circuit 11. The latter is placed in case 1 with aid of flexible members 12 and 13 whose flexible is greater than that of diaphragm 2. Mass of case is smaller than total mass of magnetic system. EFFECT: improved radiation efficiency in comprehensive range of audio frequencies and reduced nonlinear distortions. 1 dwg