Apartments are a suitable type of housing for a densely populated nation like Korea. Most of the complaints in apartment buildings are about the noise between floors. While children running are the main cause of inter-floor noise and have a moving point of continuity, the standardized impact source currently in use has a standing impact point. Before developing a new impact sound source model for simulations of children running, a survey was conducted to obtain expert opinions. A total of 50 respondents were surveyed in person, and their responses were analyzed. The experts agreed on the need for new continuous impact source models. They also preferred to study the influence of children running, continuity, and the movement of the impact point. The A-weighted sound pressure level was assessed to be the best-suited evaluation index.