Abstract: A loudspeaker including a generally spherical cabinet and at least one speaker driver contained in the cabinet and dividing the cabinet into a major sound chamber and a minor sound chamber. The cabinet has at least two sound propagation ports communicating with the major sound chamber and at least two sound propagation ports communicating with the minor sound chamber. The spherical cabinet of the loudspeaker provides an omni-directional radiation pattern. According to one possible embodiment, the at least one speaker driver comprises two speaker drivers facing each other and connected out of electronic phase so as to operate as a single push-pull unit. The loudspeaker, therefore, utilizes the rear sound waves created by its speaker drivers. One of the speaker drivers is substantially contained in the minor sound chamber and the other of the speaker drivers is substantially contained in the major sound chamber.

Abstract: An animal feeding device or food environment is a behavioral device and eating trough which mimics the natural foraging and eating behavior of non-human primates, such as macaques and baboons, in order to reduce the boredom, stress, and suffering of these captive primates. The device is attached with three specially designed fasteners to the front or side of a primate cage for easy access and for the safety of both personnel and the animals. The device comprises an elongated main tube (10) having a longitudinal side opening (12) and ends (14) with eyelets (22) attached to the cage bars (24) by turnbuckle clamps (26). A bristle brush (16) is mounted on the inside of the main tube on the bottom. Food particles are placed at the bottom of the bristles so that the animal can forage in such bristles. Several scoop tubes (18) are mounted at one end of the brush.