Patent ID: 7719924

Claim:
A macrosonic generator by air for mechanical breakage of high consistency bubbles constituting industrial foams, said macrosonic generator comprising: a power electroacoustic transducer comprising a transduction element, said transduction element being one of a magnetostrictive and a piezoelectric element, and extensionally vibrating so to act as an exciter of a radiator in the form of a plate; said radiator provided with an emitting face and a non-emitting face with each face having a discontinuous profile, where said discontinuous profile of the non-emitting face maximizes the macrosonic generator power capacity in the generation of focused acoustic fields, and minimizes radiator weight and volume; and an electronic generator device comprising a phase locked loop (PLL) including a voltage controlled oscillator, a four quadrant multiplier acting as a phase comparator and a low pass filter, a first control loop, a second control loop and a third control loop, said first, second and third loops being implemented by a processor, the first loop for controlling and monitoring the output power supplied to the power electroacoustic transducer for the constant maintenance of the power supplied to said power electroacoustic transducer, the second loop for controlling and monitoring the working frequency band of the power electroacoustic transducer and the third loop for monitoring and controlling the phase between the output current and voltage at the resonance frequency of the power electroacoustic transducer.