The uplink communication technology across the water-air interface holds significant application value for marine resource surveys, and the establishment of an integrated information network encompassing both sea and air. Currently, an effective wireless communication scheme that utilizes the translational acoustic radio frequency (TARF) system achieves exceptional anti-interference performance by utilizing the detection of acoustically induced water surface microwaves. When an underwater sound wave is transmitted to the water surface, it generates tiny vibrations of the identical frequency. Additionally, the air node can be employed to emit frequency modulated continuous waves (FMCW) towards the water surface for measurement purposes, enabling the retrieval of underwater data. However, the signal transmission process of this model remains incompletely understood, and there is an absence of a cross-medium transmission scheme suitable for complex underwater acoustic signals. Therefore, in this paper, the channel model of communication system is studied, and experiments are designed to verify it. Specifically, an in-depth investigation is conducted on the physical process of acoustic-induced water surface microwaves, focusing on low-frequency sound sources. A cross-medium information transmission system that operates between water and air was established. This system underwent experimental testing to discern and reinstate diverse acoustic signals emitted by underwater nodes through frequency domain transformation. The findings of this investigation offer crucial theoretical frameworks and practical insights for advancing cross-sea and air-medium wireless communication technologies, as well as underwater target exploration methods.