Abstract: The present invention discloses an MRI communication device, which is provided with a control room communication module and a scan room communication module. The scan room communication module includes a receiver, delivering the received first audio signals to the first air tube, while the control room communication module comprises a first sound device, through which the first audio signals are amplified and broadcast. The present invention realizes free bidirectional communication for the control room and the scan room, wherein the receiver can transmit the sound messages to the operator in the control room, making it possible for the technician to manage emergencies of making sounds in the scan room; the air tube is used to transmit audio signals, ensuring the proper operation during MRI exams and preventing them from the influence of the audio signal electromagnetic field from voice calls during MRI scans.

Abstract: A noise-reduction microphone, a noise-reduction safe earphone and a noise-reduction safe Bluetooth headset, comprising an acoustic wave concentrator which has a sound signal capturing unit at its big end used to capture sound wave signal and amplify the external sound wave signal, and then transmitted to the small end of the acoustic wave concentrator connected to the air tube, and the air tube is connected to the receiver device which receives the acoustic signal from the air tube and converts it into electrical sound signals transmitted to a voice terminal from the receiver device by a connector. The sound information is transmitted by the air tube, so the length of the air to be could be setted pretty long so that people can keep at a distance from electrical equipments with radiation, the remote air tube microphone can be separately used as microphone or mike.

Abstract: A noise reduction communication system, which includes a sending and receiving device arranged in a control room, an acoustic-electro conversion device arranged in a scanning room, and an air tube microphone headset connected to the acoustic-electro conversion device. The sending and receiving device is connected with the acoustic-electro conversion device. The air tube microphone headset is used for communication between the control room and the scanning room, wherein the noise reduction module is provided after the acoustic signals of the air tube microphone headset and the acoustic-electro conversion device are converted into electrical signals. The present disclosure can not only realize two-way wireless transmission of voice messages between the control room and the scanning room of MRI, but also reduce the noise during the transmission, thus improving the quality of voice transmission.

Abstract: A safe earphone includes a wired safe earphone and an over ear safe headphone, having plurality of speakers with different frequency responses respectively used for two ears to listen, so the frequency response is particularly good; it is provided with a noise reduction signal conversion system which effectively converts the transmission of the active noise reduction frequency signal into the transmission of the passive audio signal and then restore to the transmission of the active audio signal after transmission of 1000 mm in length, therefore human body is isolated from radiation of communication at a long distance, which achieves a good a high degree of radiation protection, and solving the technical problem that the microphone of the existing radiation-proof earphone must be placed outside the air tube. Therefore, the invention is an excellent safe earphone achieving highly radiation-proof, having high sound quality and noise reduction function.

Abstract: The present invention discloses an MRI communication device, which is provided with a control room communication module and a scan room communication module. The scan room communication module includes a receiver, delivering the received first audio signals to the first air tube, while the control room communication module comprises a first sound device, through which the first audio signals are amplified and broadcast. The present invention realizes free bidirectional communication for the control room and the scan room, wherein the receiver can transmit the sound messages to the operator in the control room, making it possible for the technician to manage emergencies of making sounds in the scan room; the air tube is used to transmit audio signals, ensuring the proper operation during MRI exams and preventing them from the influence of the audio signal electromagnetic field from voice calls during MRI scans.

Abstract: A noise-reduction microphone, a noise-reduction safe earphone and a noise-reduction safe Bluetooth headset, comprising an acoustic wave concentrator which has a sound signal capturing unit at its big end used to capture sound wave signal and amplify the external sound wave signal, and then transmitted to the small end of the acoustic wave concentrator connected to the air tube, and the air tube is connected to the receiver device which receives the acoustic signal from the air tube and converts it into electrical sound signals transmitted to a voice terminal from the receiver device by a connector. The sound information is transmitted by the air tube, so the length of the air to be could be setted pretty long so that people can keep at a distance from electrical equipments with radiation, the remote air tube microphone can be separately used as microphone or mike.

Abstract: A safe earphone includes a wired safe earphone and an over ear safe headphone, having plurality of speakers with different frequency responses respectively used for two ears to listen, so the frequency response is particularly good; it is provided with a noise reduction signal conversion system which effectively converts the transmission of the active noise reduction frequency signal into the transmission of the passive audio signal and then restore to the transmission of the active audio signal after transmission of 1000 mm in length, therefore human body is isolated from radiation of communication at a long distance, which achieves a good a high degree of radiation protection, and solving the technical problem that the microphone of the existing radiation-proof earphone must be placed outside the air tube. Therefore, the invention is an excellent safe earphone achieving highly radiation-proof, having high sound quality and noise reduction function.

Abstract: A safe in-ear earphone for radiation protection comprises earplug heads, sound cavities, acoustic wave transmission channels, a main body, a conductor and a plug. The channels are set between the sound cavities and loudspeakers. The acoustic wave concentrated orifices are between the loudspeakers and the acoustic wave transmission channels. The assembly of the loudspeakers, the acoustic wave concentrated orifices and the acoustic wave transmission channels are sealed to form a sealed small boxes in the main body. The shape of acoustic wave concentrated orifices is inverse loudhailer. The acoustic wave is transmitted to the two acoustic wave channels via the acoustic wave concentrated orifices and then is provided to the ears plugged by two earplugs to listen.

Abstract: A safe in-ear earphone for radiation protection, comprises earplug heads (1A, 1B), sound cavities (2A, 2B), acoustic wave transmission channels (3A, 3B), a main body (4), a conductor (8) and a plug (9), the channels (3A, 3B) are set between the sound cavities (2A, 2B) and loudspeakers (5A, 5B), the acoustic wave concentrated orifices (10A, 10B) are between the loudspeakers (5A, 5B) and the acoustic wave transmission channels (3A, 3B), assembly of the loudspeakers (5A, 5B), the acoustic wave concentrated orifices (10A, 10B) and the acoustic wave transmission channels (3A, 3B) are sealed to form a sealed small boxes (11A, 11B) in the main body (4). the shape of acoustic wave concentrated orifices (10A, 10B) is inversely conical. The acoustic wave is transmitted to the two acoustic wave channels (3A, 3B) via the acoustic wave concentrated orifices (10A, 10B) and then is provided to the ears plugged by two earplugs to listen.

Abstract: This invention involves a safe earphone, applied to the communication equipment like mobile phones with severe radiations of high frequency magnetic field, comprising an ear-insert, a sound transmitting passage for transmitting sound wave, a micro-speaker, a microphone, a lead, a plug and a shell. The ear-insert is connected with the micro-speaker by the sound transmitting passage. The technical design for this invention is to remove the micro-speaker out from the ear-insert, and put it far away human's ears. Using the sound transmitting passage for transmitting sound wave to users' ear. Thus, the safe earphone will be able to minimize the magnetic field strength from micro-speakers or mobile phone, so as to prevent harmful magnetic field to damage users' brains, and to avoid long time users suffering from such diseases as headaches, dizzies, and numbness. Further more, the sound heard from the safe earphone is clearer the common earphone.