Abstract: A glazing having enhanced acoustic performance, includes at least one transparent substrate including, on at least one of its faces, an array of transparent piezoelectric transducers and a plurality of resonant electrical circuits, each transparent piezoelectric transducer being connected to a single resonant electrical circuit such that the substrate forms a transparent metamaterial.

Abstract: The headset includes an active noise control with an internal microphone (28) and an external microphone (32). A processor (42) comprises a feedback branch (46), adjusted so as to attenuate the low frequencies corresponding to a component of a voice signal transmitted by bone conduction, and a feedforward branch (58) adjusted so as to compensate for the attenuation introduced by the feedback filtering and the passive acoustic attenuation introduced between the outside and the inside of the headset. A voice activity detector (60) operates a dynamic switching between two couples (HFB, HFF) of different transfer functions applied to the feedback (46) and feedforward (58) functions. This allows rendering in the most natural way possible to the user all the external sounds, including his own voice.