Method and device for processing an electrical signal for an ultrasonic transmitting device

Method according to any one of the preceding claims, wherein modulation (ML1) of the phase (PH1) of the electrical signal comprises:

• introducing, into the electrical signal (SG1a), at least one delay (30) corresponding to a period during which the voltage of the electrical signal is kept at a constant value.

Method according to any one of the preceding claims, wherein modulation (ML1) of the phase is configured so that the electrical signal (SG1) supplies electrical energy at least equal to theoretical energy that would be supplied by the electrical signal if its phase were not disturbed by said phase modulation.

Method according to any one of the preceding claims, wherein the phase (PH1) is modulated (ML1) while maintaining the same frequency on each cycle of the electrical signal (SG1).

Method according to any one of the preceding claims, wherein the ultrasonic waves (W) are compression waves generating shear waves in a medium (M).

Method according to any one of the preceding claims, wherein said method is applied to medical ultrasound imaging.

Computer program (PG1) including instructions for carrying out the steps of a method according to any one of the preceding claims when said program is run by a computer (10).

Device (10) for processing an electrical signal (SG1) for an ultrasonic transmitting device (20), said processing device comprising:

• a generation module (MD2) configured to generate an electrical signal (SG1) defining ultrasonic waves (W), the periodicity of the electrical signal being modified by modulation (ML1) of the phase (PH1) of the signal;
• and
• a supply module (MD4) configured to supply the electrical signal to the ultrasonic transmitting device (20) to cause the ultrasonic waves (W) to be emitted.