A method for producing an electro-biometric signature allowing legal interaction between and the identification of persons utilizing biometric features. The assembly includes at least one image capture device for acquiring images of product display units in a product facility, product labels being associated with the product display units which include product-related data. Such pre-compression may be implemented with spectral filters andor dispersive elements between the oscillator and amplifier. A difference between the third current density and the fourth current density is larger than a difference between the first current density and the second current density. Accordingly, an ultrasonic probe which permits to collect ultrasonic wave images including tomograms and blood flow images of high quality without positional irregularity over the entire circumference of the insert section of the ultrasonic probe and to display the same, and an ultrasonic diagnostic apparatus using the same are obtained. The demodulating step includes demodulating an initially repeated data frame group at only one location in the data frame and demodulating data frame groups containing power control bits.