TECHNOLOGY FOCUS - IMAGING AND COMMUNICATION - Preferred Device: The loudspeaker further includes a storage battery (25) where the electricity produced by the photovoltaic cells are stored; and a cordless mechanism that enables the loudspeaker to be operated without leads (23) or wires from a current source. The cordless mechanism is powered by current directly from the photovoltaic cell and/or the storage battery. The loudspeaker is operated by signals from an internally stored audio program source. Preferred Component: The photovoltaic cells form a thin layer (21) that covers an entire surface of the diaphragm. The cordless mechanism includes (a) a radio frequency signal receiver (29) with complementary power amplification mechanism to provide varying electric current to the driver unit corresponding to the signals received; and (b) a complementary radio signal generation and transmission mechanism to generate and transmit the signals received by the signal receiver. The signal generation and transmission mechanism is coupled to an audio amplifier connected to a source of sound or music. Preferred Material: The diaphragm is formed from a sheet material that is flexible and has internal ridges, swages, or cellular structure that prevents the diaphragm from collapsing from its own weight. Preferred Configuration: The diaphragm has a uniform consistency and thickness. It has a non-uniform consistency and thickness in selected regions to improve or tune the loudspeaker's frequency response. The cordless mechanism and the storage battery are housed in a housing or frame associated with the diaphragm.    TECHNOLOGY FOCUS - TEXTILES AND PAPER - Preferred Material: The sheet material is core flute or corrugated cardboard having a cellular structure comprising longitudinal cells which have a square or rectangular cross section.    TECHNOLOGY FOCUS - POLYMERS - Preferred Material: The diaphragm can also be constructed from a resilient plastic, i.e., high-density polypropylene.