## 1 Introduction
[PERSON] established the acoustic-vibration prediction model of a large-span steel-truss cable-stayed bridge to analyze the vibration and noise reduction characteristics and effects of three vibration reduction tracks on the bridge [26]. [PERSON] evaluated the vibration and noise reduction effects of different vibration reduction tracks on the subway viaduct; the results showed that the vibration reduction tracks could reduce the noise of bridges [27]. [PERSON] evaluated the efficiency of five noise mitigation measures, including a rubber floating-slab track, and pointed out that the combined control strategy showed overall better performance than individual mitigation measures within the efficient noise reduction regions [28]. [PERSON] studied the effect of SSFSTs on bridges and the impact of their parameters on the structural noise of bridges [29]. However, although a vibration reduction track laid on an elevated railway can reduce the vibration and noise of an elevated bridge, the vibration of the track is amplified. [PERSON] pointed out that the vibration of the SSFST on the bridge intensified [30]. [PERSON] studied the low-frequency vibration characteristics of simply supported BGB laying SSFST, and the results showed that the vibration reduction effect of the bridge was intensified by intensifying the SSFST vibration at 15-30 Hz [31]. The literature [23] obtained similar results. Therefore, it is also necessary to carry out research related to the acoustic radiation problem when the track vibration on the bridge is amplified. [PERSON] studied the acoustic radiation characteristics of the reduction vibration track on U-beam bridges [32]. [PERSON] studied the acoustic vibration characteristics of steel-spring short floating-slab tracks (SSSFSTs) on BGB [33]. [PERSON] studied the low-frequency acoustic radiation characteristics and mechanism of SSFST on URT bridges. The investigation indicated that the SSFST had strong acoustic radiation capability; the acoustic radiation of the vibration reduction track on the bridge should be of great concern [34]. [PERSON] studied the acoustic radiation characteristics of ballastless track in HSR by the wavenumber finite element-boundary element method, and the research showed that the track slab made a very important contribution to the acoustic [35]. [PERSON] investigated the reason and control method for the noise suddenly increasing in the vehicle when the train is running on the SSFST; the results provided a reference for the design of SSFSTs in terms of noise control [36]. In summary, in order to reduce the impact of vibration, the SSSFSTs are often used in URT because this track has good vibration damping performance. However, when a train passes, the SSSFSTs can also produce noise due to vibration. This has been considered in a few studies, especially how the vibration of SSSFSTs on a bridge can be aggravated in practical applications. In addition, the acoustic waves of each floating slab have mutual superposition or phase elimination and other acoustic effects in the propagation process; therefore, whether the model of SSSFST dynamic performance described in previous research is suitable for the analysis of acoustic radiation characteristics needs to be further studied. In order to study the acoustic radiation characteristics of SSSFSTs on one-span bridges, it is necessary to establish a detailed acoustic model that can accurately reflect the acoustic radiation characteristics. Therefore, based on train-track-bridge interaction theory and acoustic theory, this paper systematically analyzes the selection of the acoustic radiation model of SSSFSTs on a one-span bridge. This research provides a reasonable acoustic analysis model for evaluating the influence of SSSFSTs on the surrounding acoustic environment.