Method for electroacoustic transducer transient suppression

The problem of determining the driving voltage waveform required to stimulate an electroacoustic transducer so as to produce no transients in the sound radiated into the surrounding fluid medium is considered. The goal is to produce a sound wave in the fluid that is a section of a steady-state sine. The method of analysis involves evaluating an equivalent circuit for the transducer of interest. In the case of a simple LCR circuit, the method achieves 100% transient suppression. Experimental measurements verifying the validity of the approach are presented. The experimental work involved the study of spherical transducers. The complex electrical impedance of the transducer under test was first measured as a function of frequency. A nonlinear least squares fitting algorithm was then used to determine the best-fit equivalent circuit model parameters, which were then used in the transient-suppression theory to determine the proper transient-suppressing driving voltage waveshape