Figure 3.

Amplitude of the Fourier transformation in time to get the frequency domain pressure amplitude from the measured signals shown in Figure 2 at a distance r of 7.65 mm, 10.65 mm, and 24.65 mm. The frequency response of the transducer is taken into account in the frequency domain by an additional factor $\tilde{T}\left(\omega \right)$ in Equation (4). The transducer limits the frequency bandwidth, and therefore, a significant influence according to Equation (4) on the bandwidth of the signals can be seen only for larger distances, such as that at 24.65 mm.