Thales

Bruno Josso

Daniel Billet

The invention relates to the field of devices intended to generate a noise of high amplitude having specific spectral characteristics. It concerns a transmission device mainly comprising a transducer, means for synthesizing a digital noise sequence x'(n) and power sources. According to the invention, the device also comprises means such that according to the value, at each time t, of the synthesized noise sequence, the transducer is supplied by one or more noise sources placed in series, the overall voltage reflecting the value of the digital noise sequence. The transition times between two supply values are synchronous with the basic clock of means which synthesize x&#x2032;(n). The invention also relates to a method for iteratively synthesizing, under spectral constraint, a noise having a power spectral density corresponding to a given template. The invention applies in particular to the submarine acoustic noise generators on board small-size autonomous craft. It can also apply to the production of scramblers in mobile telephony.

Growing community of inventors

Juan les Pins, France

Bruno Josso