While the bending and force sweep tests provide valuable insights into the piezoelectric performance of PLLA films under varying mechanical forces, understanding the response of these films at different frequencies is equally critical. In real-world applications, piezoelectric materials are often subjected to dynamic environments where the frequency of mechanical input can significantly impact their electrical output. By examining the frequency-dependent behavior, we can evaluate the stability, efficiency, and adaptability of PLLA films across a range of operational conditions, ensuring their suitability for applications that involve oscillatory or vibratory motions. For the frequency sweep, a similar setup to the setup used for the force sweep is used. The frequency sweep tests were conducted at 30 Hz, 40 Hz, and 50 Hz while keeping the force constant at 0.5 N. The results obtained are presented in Figure .