Patent ID: 6956953

Claim:
A thin diaphragm electroacoustic transducer having at least two elongated interlaced coils for use as loudspeaker, characterized by including a field replaceable sound emitting diaphragm that can be replaced without needing to manipulate wires, the electroacoustic transducer comprising: a) a magnetic system comprising an upper plate pole, two side poles, a central pole and a row of Neodymium magnet bars, wherein two air gaps are formed between the upper plate pole and the central pole and magnetic lines transversing the gap create a high density field; b) a thin foil diaphragm carrying at least two thin aluminum conductors forming at least one binary interlaced coil, the two thin aluminum conductors being built the one into each other, and being situated substantially in the plane of the magnetic lines transversing the air gaps, wherein the conductors of the diaphragm, when crossed by the same intensity of flux lines perpendicularly, at the totality of their length, are subject to the same force F upon the application of F=Bli; and c) a diaphragm sound emitting assembly comprising a frame made of non-ferrous sheet metal, on which is tensioned a vibratable thin diaphragm comprising a high temperature polymer on which are formed two elongated coils of aluminum foil, the elongated coils being identical, symmetrical, and interlaced the one into the other.