An estimator training method and a pose estimating method using a depth image are disclosed, in which the estimator training method may train an estimator configured to estimate a pose of an object, based on an association between synthetic data and real data, and the pose estimating method may estimate the pose of the object using the trained estimator. The wound cover has a length and width substantially greater than a height, a first major surface, and a second major surface comprising a polyurethane film, opposite the first. The conical face has a cone axis, and the outlet is located at an apex of the conical face. The audiovisual system further comprises an audiovisual apparatus coupled to the rendering circuit and the emulation circuit, and a display coupled to the rendering circuit. Soft duct system management can be implemented by one or more computer systems.