Planar flexible voice coil suspension

An acoustic transducer comprising:

• a housing defining at least one stationary electrical contact;
• a magnet assembly fixedly mounted in said housing and defining an air gap extending around a central axis;
• a voice coil having at least one electric terminal;
• spider means for suspending said voice coil for axial movement in said air gap, said spider means comprising:
• a sheet of flexible dielectric material formed to define a circular flexure portion and having an elongate connector portion extending therefrom to an outer end;
• and
• at least one flat electrically conductive path formed on said dielectric sheet extending from said outer end adapted for connection to said stationary contact to a connection location on said flexure portion adapted for connecting to said electric terminal;
• wherein said flexure portion comprises a concentric outer ring a concentric inner ring;
• and wherein
• said sheet of dielectric material defines a set of links connecting said outer ring to said inner ring and wherein said flexure portion further comprises a concentric intermediate ring disposed in between said concentric outer and inner rings;
• and wherein said set of links connecting said outer ring to said inner ring comprises a first set of radial links connecting said outer ring to said intermediate ring and a second set of radial links connecting said intermediate ring to said inner ring.