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This work employs a laser Doppler vibrometer (LDV) as a sensing modality for experimental measurements of bending wave properties in viscoelastic panels. A recently developed transfer function method is applied to characterize these properties, with a focus on experimentally determining the bending wave propagation coefficient—a key quantity from which other bending wave properties can be derived. The LDV measures the bending velocities at two surface points on the panel, enabling the determination of the propagation coefficient as a primary parameter. From this, other properties such as the bending phase speed, Young’s modulus, and the loss factor are obtained. Two approaches for determining the phase speed are examined: one based on the propagation coefficient, and another that calculates the phase spectrum of the transfer function. Following a brief introduction of the theoretical foundation, this paper discusses validation efforts for the experimentally measured bending phase speed using both approaches, with the ultimate goal of deriving additional parameters from propagation coefficient measurements.