Abstract: An electro-acoustical transducer device is disclosed, which includes: a hollow disk body that generally defines an axis of propagation, the hollow disk body comprising: a pair of plate members extending substantially perpendicular to the axis of propagation, each provided with a central transmitting port arranged about the axis of propagation, and a peripheral enclosure jointing the pair of plate members at the respective outer edge portions thereof, thereby defining a chamber of resonance between the pair of plate members; wherein a ring-opening about the axis of propagation that enables access to the chamber of resonance is formed between the central transmitting ports of the plate members.

Abstract: A flexible light strip includes an electrical-conductive layer, a plurality of light-emitting units, an insulating layer, and a heat-conducting layer. The light-emitting units are adhered to the electrical-conductive layer and are electrically connected thereto. The insulating layer is overlapped on one surface of the electrical-conductive layer. The insulating layer is provided with a plurality of through holes for allowing the light-emitting units to pass through. The heat-conducting layer is adhered on the electrical-conductive layer. Due to its flexibility, the light strip of the present invention can be bent and adhered to articles of various shapes according to practical demands.