The present invention is systems and methods for matching desired purchases and sales of mis-matched items. The generated second sound signal is a sound signal to which a predetermined acoustic effect is not added, and the first sound signal is a sound signal in which an acoustic effect is added to at least a part of sounds included in the second sound signal. According to the present invention, the user has access, for example, to interact with, to modify, and to use the dynamic computing environment including the at least one virtual resource and the at least one physical resource. A plastic tubing dispenser ring fits over the intake tube and contains thin plastic tubing that acts as a liner in the intake tube during use. A sensor may be added to detect the hinge assembly in the open position.