  Virtual instrument technology has been increasingly used in university
physics experiment teaching. An experimental platform is specifically
constructed for studying low-frequency vibrations in university physics, which
is based on a computer and its internal sound card, along with a program
developed in LabVIEW programming environment to perform control and measurement
on our experimental platform. The proposed platform effectively replaces the
conventional signal generator and oscilloscope traditionally used in such
experiments by integrating virtual instruments and essential experimental
equipment. The platform offers various functionalities, such as synchronous
transmission and reception of low-frequency signals, frequency measurement,
dynamic frequency sweep measurement, and measurement using the three-point
approximation method. The proposed platform has been successfully applied in
experiments involving forced vibration, resonance of tuning forks, and dynamic
measurement of Young's modulus. Unlike conventional low-frequency vibration
experiments, the proposed experimental platform optimizes efficiency, reduces
costs, and offers opportunities for enhancing the instructional content of
experiments. Furthermore, the incorporation of state-of-the-art computer
technology enhances students' engagement and enthusiasm for learning.
