The free resonating frequency of a cantilever beam is determined by its material and geometric properties, not its deflection. The formula for calculating this frequency is f = (1/2π) * √(8EI/(ρAl^4)), where I is the moment of inertia, E is Young's modulus, ρ is the density, A is the cross-sectional area, and l is the length of the beam. This relationship highlights that the resonant frequency remains constant regardless of deflection. Understanding these parameters is crucial for accurate frequency calculations in engineering applications. The discussion emphasizes the importance of material properties and geometry in determining resonant frequency.