Abstract: The invention relates to an acoustic device capable of producing active noise reduction, which may be positioned on the head of a user, comprising at least one microphone capable of sensing a sound signal representative of ambient noise, including at least one active noise reduction acoustic module comprising an osteophonic transducer, capable of being positioned on a side flank of the head of the user and of transmitting a vibratory signal transformed by bone conduction into an acoustic signal which may be perceived by the user, connected to said microphone, while said at least one acoustic module includes an electronic circuit capable of generating a vibratory signal giving the possibility of attenuating perception of said ambient noise by the user.

Abstract: The invention relates to an acoustic device capable of producing active noise reduction, which may be positioned on the head of a user, comprising at least one microphone capable of sensing a sound signal representative of ambient noise, including at least one active noise reduction acoustic module comprising an osteophonic transducer, capable of being positioned on a side flank of the head of the user and of transmitting a vibratory signal transformed by bone conduction into an acoustic signal which may be perceived by the user, connected to said microphone, while said at least one acoustic module includes an electronic circuit capable of generating a vibratory signal giving the possibility of attenuating perception of said ambient noise by the user.

Abstract: The present invention relates to a microphone comprising a transducer for converting acoustic or vibratory oscillations into an electric signal; a preamplifier for amplifying the electric signal; and a controllable switch arranged electrically between the transducer and the preamplifier, the switch being adapted to be controlled by a control signal, the preamplifier including an input terminal connected directly to a terminal of the transducer, the microphone being adapted to transmit the amplified electric signal to a power and transmission device. The invention further relates to a mask comprising such a microphone.

Abstract: This acoustic headset (2) comprises: two lateral acoustic modules (4, 6) comprising a mechanical bone excitation transducer (20, 22) which is capable of transmitting the sound signal to the auditory nerve by bone conduction, a flexible upper curved member (8) and a rigid rear curved member (10) for connecting the acoustic modules (4, 6). Each acoustic module (4, 6) comprises: a plate (16, 18) for lateral abutment against the sides of the skull, an articulation (24, 26) between the abutment plate (16, 18) and the transducer (20, 22), a spring for return movement, in terms of rotation about the axis of articulation (24, 26), of the transducer (20, 22) relative to the plate (16, 18) towards a rest position.

Abstract: This acoustic headset (2) comprises: two lateral acoustic modules (4, 6) comprising a mechanical bone excitation transducer (20, 22) which is capable of transmitting the sound signal to the auditory nerve by bone conduction, a flexible upper curved member (8) and a rigid rear curved member (10) for connecting the acoustic modules (4, 6). Each acoustic module (4, 6) comprises: a plate (16, 18) for lateral abutment against the sides of the skull, an articulation (24, 26) between the abutment plate (16, 18) and the transducer (20, 22), a spring for return movement, in terms of rotation about the axis of articulation (24, 26), of the transducer (20, 22) relative to the plate (16, 18) towards a rest position.