Rectangular panel-form loudspeaker and its radiating panel

A structure of a rectangular panel-form loudspeaker comprising:

• a radiating panel comprising a rectangular laminated composite plate including length b, width a, and an intermediate core layer sandwiched between two fiber-reinforced polymeric layers, wherein the two fiber-reinforced polymeric layers include at least one uni-axial fiber-reinforced laminate, which is configured to produce a uniform sound pressure sensitivity spectrum over a frequency range when producing a flexural vibration;
• a transducer for exciting said radiating panel to produce the flexural vibration, said transducer comprising a voice coil assembly and a magnet assembly, wherein said voice coil assembly is coupled to a first side of said laminated composite plate at a first specified location;
• a frame for positioning said laminated composite plate and said magnet assembly;
• and
• a suspending unit including a soft material and disposed between peripheral edges of said laminated composite plate and said frame.