Abstract: A noise-absorbing device includes a substantially flat base and embossed and/or hollow elements each including at least one recess. This base reveals with the embossed and/or hollow elements, a configuration exhibiting a fractality zone of between 1 cm and 50 cm, of fractal dimension greater than 2.5 enabling the localization of the waves over the sound frequency range, in the vicinity of the elements.

Abstract: A noise-absorbing device includes a substantially flat base and embossed and/or hollow elements (1) each including at least one recess (2). This base reveals with the embossed and/or hollow elements (1), a configuration exhibiting a fractility zone of between 1 cm and 50 cm, of fractile size greater than 2.5 enabling the localization of the waves over the sound frequency range, in the vicinity of the elements (1).

Abstract: A modular securing device comprises a set of elongated elements intended to be laid on the road and connected together at their ends. Each of the elements is provided at one of its ends with a male linking member and at the other end with a female linking member, the linking members being shaped in order to engage into one another only long enough for two successive elongated elements to be in a first relative position and to be prevented from being separated long enough for both these elements to be in a second relative position. A process of laying such a device is described.