Loudspeaker membrane and low-profile loudspeaker

A wide range loudspeaker membrane adapted to cover an opening of a low-profile loudspeaker, the membrane outwardly having an outward face for radiating sound and opposite and inwardly an inward face for facing towards a volume of a chassis of a loudspeaker, the membrane comprising:

• an outer periphery, an aperture with an aperture periphery defining a suspension path along which to suspend the membrane in the loudspeaker and with an excitation path at the outer periphery along which to excite the membrane to produce sound when suspended and excited, wherein the excitation path has a flange extending inwardly for rigidly connecting a voice coil to the excitation path, the membrane having a plurality of structure paths, each single one of the structure paths substantially extending between the excitation path and the suspension path, along each single one of the structure paths non-flush structures are provided to the otherwise flush outward face, wherein the projections of the suspension path and the excitation paths on the outward face are symmetric about a symmetry point or a symmetry line, and wherein the projection of the structure paths and each single structure path has the shape of a curve section of one or more curves or approximations thereto and at least one of:
• a Fibonacci spiral,
• a golden spiral,
• an Archimedean spiral,
• a Euler spiral,
• a Fermat's spiral,
• a hyperbolic spiral, or
• a logarithmic spiral,
• wherein at least one of (i) the curve origin of the generic curve is placed at the symmetry point or (ii) the of aperture periphery and the curve section is, from the curve origin, the curve section that essentially extends between and without crossing the suspension path and the excitation path, and wherein the distance from the aperture periphery or from the suspension path to the starting point of a single one of the structure paths is different and alternates.