CN214228432U

CN214228432U - Noise reduction communication system

Info

Publication number: CN214228432U
Application number: CN202022009042.5U
Authority: CN
Inventors: 诸爱道
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-28
Filing date: 2020-08-26
Publication date: 2021-09-17
Anticipated expiration: 2030-08-26
Also published as: CN112449268A

Abstract

The present invention relates to a noise reduction communication system, which comprises: a receiving and transmitting device arranged in the control room; the receiving and transmitting device is connected with the sound-electricity conversion device, the air duct microphone earphone is used for voice communication between a control room and the scanning room, and a noise reduction module is arranged after sound signals of the air duct microphone earphone and the sound-electricity conversion device are converted into electric signals. The invention not only can realize the bidirectional wireless transmission of the voice information of the control room and the scanning room of the nuclear magnetic resonance, but also can reduce the noise of the voice information received by the contents of the control room and the scanning room, thereby improving the voice transmission quality.

Description

Noise reduction communication system

Technical Field

The invention relates to a two-way communication device without a magnetic field or an audio-frequency electric signal entering a special environment, in particular to a noise reduction communication system.

Background

The existing communication equipment is generally suitable for conventional application scenes, but for some special or extreme scenes, such as strong magnetic field and strong noise places, a strong magnetic field and strong noise exist in working places, weak active magnetic signals cannot interfere the weak magnetic fields in the working places, for example, the strong magnetic field and strong noise scenes which can be contacted by general people are scanning rooms where nuclear magnetic resonance instruments are located, and the patent solves the difficult places.

When nuclear magnetic resonance detection is carried out, a person to be detected is in a scanning room, an operator controls equipment in a control room to scan the person to be detected, but the scanning room and the control room are completely isolated, and a shielding layer is arranged between the scanning room and the control room, so that sound isolation between the control room and the scanning room is caused, and the problem of difficult communication between the person to be detected and the operator is caused.

Because the nuclear magnetic resonance apparatus can produce powerful magnetic field and huge noise when working, the present talking equipment with metal material can not use, so the measure taken at present is to inlay and set up the megaphone on the wall in the scanning room, but in order not to hinder the normal work of magnetic resonance apparatus, so install the loudspeaker very high, very far away from the person being examined and the noise in the scanning room is very big, can lead to the person being examined to be unable to hear clearly, cause the mistake to survey very easily, bring the misdiagnosis to the patient.

In addition, since the loudspeaker is generally unidirectional, only the sound in the control room can be transmitted to the scanning room, but the person to be inspected in the scanning room cannot actively communicate with the operator in the control room, so that the person to be inspected can only listen to the instruction of the operator in a single direction to act, and when the person to be inspected is in an uncomfortable condition or an emergency condition, the person to be inspected cannot communicate with the operator in the control room to take corresponding measures, so that the false detection of the nuclear magnetic resonance detection can be caused, the accuracy and the reliability of the nuclear magnetic resonance detection are reduced, and the interruption of the detection can be caused.

Meanwhile, part of the tested personnel take off the scanning bed on the oxygen mask, the scanning time is as short as 20 minutes, if a plurality of parts are scanned, 40 minutes or more are needed, and in the time, if the tested personnel have discomfort, the potential risk exists when the tested personnel cannot be provided for the personnel in the control room.

In addition, some tested patients are quite small, and the sound is quite loud when the tested patients lie in the round hole which is pushed by a large magnetic field on the bed, so that the patients are easy to panic, and the patients who are frightened are often found in the control room.

In order to realize the communication between the nuclear magnetic resonance scanning room and the control room, at present, manufacturers set an alarm air bag for a patient in the scanning room, once the patient needs to talk, the alarm air bag is triggered by hands, the control room staff is informed to close the magnetic resonance equipment to stop scanning work, the patient can talk for the control room, after the talk is over, the control room staff needs to restart the magnetic resonance equipment to scan, the operation is very troublesome, the time is wasted, and the scanning quality problem is easy to cause.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a noise reduction conversation system for nuclear magnetic resonance detection.

In order to achieve the purpose, the invention provides the following technical scheme:

a noise-reducing call system, comprising:

a receiving and transmitting device arranged in the control room;

an acoustoelectric conversion device arranged in the scanning room and an air duct microphone earphone connected with the acoustoelectric conversion device,

the receiving and transmitting device is connected with the sound-electricity conversion device, the air duct microphone earphone is used for voice communication between the control room and the scanning room,

and the air duct microphone earphone and the sound signal of the sound-electricity conversion device are provided with a noise reduction module after being converted into an electric signal.

Further, air duct microphone earphone includes the earphone frame, the both sides of earphone frame all are equipped with the pronunciation delivery outlet, and arbitrary one side is equipped with sound collector one, pronunciation delivery outlet and sound collector one all are connected with sound electricity conversion equipment through independent air duct.

Furthermore, the two voice output ports are respectively connected with the air duct I through the air duct I and the air duct II, the sound collector I is connected with the air duct V through the air duct IV, and the air duct III is independent of the air duct V and is connected with the sound-electricity conversion device.

Further, an air duct plug seat is arranged in the middle of the air duct microphone earphone.

Further, the noise reduction module comprises a first noise reduction module, a second noise reduction module and a third noise reduction module, wherein the first noise reduction module is connected with a first microphone for detecting environmental noise, the second noise reduction module is connected with a first loudspeaker, the third noise reduction module is connected with a second microphone, the first loudspeaker is connected with an air conduit A of a sound head for collecting noise, and the second microphone is connected with an air conduit B of a second sound collector of an air conduit microphone earphone.

Furthermore, a vibrating diaphragm is arranged in a sound collector II of the air conduit microphone earphone and is connected with a microphone II with an amplifying port through an air conduit B, the microphone II is connected with a noise reduction module III through a metal shielding wire, the noise reduction module III is used for processing the spectrum signal-to-noise ratio algorithm, and the noise is filtered and is connected with a comprehensive unit I positioned in a control room through a filter I.

The audio signal of the first synthesis unit in the control room is sent to the first loudspeaker with the sound wave concentration port through the second filter and the conducting wire, and the alternating current signal with the opposite phase waveform sent by the second noise reduction module is used for offsetting the noise received by the patient before being sent to the first loudspeaker.

The vibration sound generated by the diaphragm collected by the sound head for collecting the noise is sent to the third microphone through the air conduit C, the audio signal generated by the third microphone is sent to the second noise reduction module and the second noise reduction module for noise reduction treatment, and the generated anti-phase signal is sent to the first loudspeaker.

The first microphone collects ambient noise, and performs feedforward active noise reduction through the first noise reduction module and the first noise reduction module to generate an anti-phase signal, and the anti-phase signal is sent to the first loudspeaker.

Further, the receiving and transmitting device is wirelessly connected with the sound-electricity conversion device.

Furthermore, the receiving and transmitting device comprises a fourth microphone, a controller and a control room transceiver which are sequentially connected, a radio frequency cable for an antenna of the control room transceiver passes through a third filter and a shielding wall to be installed in a scanning room close to the shielding wall, the sound-electricity conversion device is connected with the patient transceiver, the patient transceiver is provided with a patient transceiver antenna, and the control room transceiver antenna and the patient transceiver antenna form communication connection.

Furthermore, the control room transceiver antenna and the patient transceiver antenna are both directional antennas, and the transmission power of the patient transceiver antenna is smaller than that of the control room transceiver antenna.

Further, the receiving and transmitting device is connected with the sound-electricity conversion device in a wired mode.

Furthermore, the receiving and transmitting device comprises a first receiving channel and a first transmitting channel, the sound-electricity conversion device comprises a second receiving channel and a second transmitting channel which are independent from each other, and the first receiving channel and the second transmitting channel and the first transmitting channel and the second receiving channel are connected through air ducts respectively.

Furthermore, the first receiving channel comprises a microphone five with an amplifying port I, an amplifying circuit I and a loudspeaker II which are connected in sequence;

the first voice transmission channel comprises a third loudspeaker with a sound wave concentrator, a second amplifying circuit and a sixth microphone which are sequentially connected.

Furthermore, the second receiving channel comprises a first shielding box, a fourth loudspeaker with a first sound wave concentrator, a third amplifying circuit and a seventh microphone with a second amplifying port, wherein the fourth loudspeaker, the third amplifying circuit and the seventh microphone are sequentially connected and positioned in the first shielding box;

the second transmitting channel comprises a second shielding box, a fifth loudspeaker with a second sound wave concentrator, a fourth amplifying circuit and a eighth microphone with a third amplifying port, wherein the fifth loudspeaker, the fourth amplifying circuit and the eighth microphone are sequentially connected and positioned in the second shielding box, the fifth loudspeaker is connected with the first receiving channel through an air conduit F, and the eighth microphone is connected with one jack of the socket through an air conduit G.

The control room transceiver comprises a control room transceiver comprehensive service processing unit, a control room transceiver analog-to-digital conversion unit, a control room transceiver digital-to-analog conversion unit, a control room transceiver zero intermediate frequency conversion unit, a control room transceiver amplitude limiting and filtering unit, a control room transceiver amplification unit, a control room transceiver switch and a control room transceiver antenna;

the patient transceiver comprises a patient transceiver comprehensive service processing unit, a patient transceiver analog-to-digital conversion unit, a patient transceiver digital-to-analog conversion unit, a patient transceiver zero intermediate frequency conversion unit, a patient transceiver amplitude limiting and filtering unit, a patient transceiver power amplification unit, a patient transceiver switch and a patient transceiver antenna;

the audio signal transmitted by the receiving and transmitting device is processed by the control room transceiver integrated service processing unit, the control room transceiver analog-to-digital conversion unit, the control room transceiver zero intermediate frequency conversion unit, the control room transceiver power amplification unit, the control room transceiver switch and the control room transceiver antenna in sequence and then converted into a wireless signal, and the wireless signal is directionally transmitted to the patient transceiver antenna through the control room transceiver antenna; the wireless signals received by the patient transceiver antenna and directionally transmitted by the control room transceiver antenna are sequentially processed by the patient transceiver receiving and transmitting switch, the patient transceiver amplitude limiting and filtering unit, the patient transceiver zero intermediate frequency conversion unit, the patient transceiver analog-to-digital conversion unit and the patient transceiver comprehensive service processing unit and then converted into audio signals for transmission to the sound-electricity conversion device;

the audio signal transmitted by the sound-electricity conversion device is converted into a wireless signal after being processed by the patient transceiver comprehensive service processing unit, the patient transceiver digital-to-analog conversion unit, the patient transceiver zero intermediate frequency conversion unit, the patient transceiver power amplification unit, the patient transceiver switch and the patient transceiver antenna in sequence, and is directionally transmitted to the control room transceiver antenna by the patient transceiver antenna; the wireless signals received by the control room transceiver antenna and directionally transmitted by the patient transceiver antenna are sequentially processed by the control room transceiver receiving and transmitting switch, the control room transceiver amplitude limiting and filtering unit, the control room transceiver zero intermediate frequency conversion unit, the control room transceiver analog-to-digital conversion unit and the control room transceiver comprehensive service processing unit and then converted into audio signals for transmission to the receiving and transmitting device.

Furthermore, the patient transceiver and the control room transceiver are both provided with antennas for configuration modulation of the transmitting circuit, the antennas are directional narrow transmitting channel antennas, a narrow channel is arranged between the patient transceiver and the control room transceiver, and the antennas transmit in the narrow channel and perform signal exchange.

Further, the narrow channel is located outside the scanning area.

Further, the patient transceiver is provided with a wireless-transmitting airbag alarm device; the wireless-transmitting safety air bag alarming device is provided with a safety air bag ball; the patient transceiver is provided with a pneumatic switch and a control alarm circuit; one end of the control alarm circuit is connected with the pneumatic switch; the other end of the pneumatic switch is connected with an air conduit through a plug connector, the other end of the air conduit is connected with an air bag ball, and the other end of the control alarm circuit is connected with a comprehensive service processing unit of a patient transceiver.

Furthermore, the second voice transmission channel comprises a third shielding box and a fourth shielding box which are sequentially connected, wherein a ninth microphone with an amplifying port, a fifth amplifying circuit and a sixth loudspeaker with a sound wave concentrator are sequentially connected in the fourth shielding box, the sixth loudspeaker is connected with the fifth amplifying circuit through an air conduit H, a fourth noise reduction module, the sixth amplifying circuit and a seventh loudspeaker with the sound wave concentrator are sequentially connected in the third shielding box, the small end of the sound wave concentrator is connected with the small end of the amplifying port, and the other end of the fourth noise reduction module is connected with the first wheat microphone;

the first speech channel comprises a loudspeaker eight and a comprehensive unit two which are connected in sequence.

Furthermore, the second voice transmission channel comprises a shielding box five, a noise reduction module five, an amplifying circuit seven and a loudspeaker nine with a sound wave concentrator six are sequentially arranged in the shielding box five, wherein the small end of the sound wave concentrator four is connected with the small end of an amplifying port five positioned on the outer side of the shielding box through an air conduit, the large end of the amplifying port five is connected with a microphone ten, the other end of the noise reduction module five is connected with a wheat microphone two, and the other end of the microphone ten is connected with a filter four;

the first voice transmission channel comprises a loudspeaker ten, a synthesis unit three and a filter four which are connected in sequence.

Furthermore, the air conduit microphone earphone is made of no metal material from the head bow to the air conduit plug seat.

Furthermore, an additional air bag alarm is provided for a patient who cannot speak, a gas sounder is arranged on the sound receiving surface of a first sound collector of an earphone of the air duct microphone and is covered by a housing cover, the housing is movably arranged on the first sound collector, and when the gas sounder is not used, the housing is opened to take the gas sounder and the air bag;

if the patient needs to contact with a doctor in the control room, the air bag is pressed down, the air in the air bag transmits air pressure to the air sound generator through the air conduit I, the air sound generator generates alarm sound and transmits the alarm sound to the first sound collector, and the alarm sound received by the first sound collector transmits an alarm signal to the control room through the air conduit microphone earphone and the patient transceiver or the sound-electricity conversion device.

The invention has the beneficial effects that:

1. the air conduit earphone in the communication system can be applied to a strong magnetic and strong noise scene, an audio signal transmitted by a receiving and transmitting device can be converted into a sound signal through the sound-electricity conversion device, then the sound signal is transmitted to the ears of personnel through the lengthened air conduit, and the air conduit earphone does not contain metal components and cannot be linked with a strong magnetic environment; the invention is particularly suitable for nuclear magnetic resonance examination, can enable the control room and the scanning room of the nuclear magnetic resonance to realize the bidirectional wireless transmission of voice information, has simpler structure of a communication system and longer voice transmission distance, and ensures that nuclear magnetic resonance equipment is not influenced by an audio signal electromagnetic field of voice communication when carrying out nuclear magnetic resonance scanning.

2. The noise reduction module is arranged in the sound-electricity conversion device and comprises the sound listening noise reduction device and the sound production noise reduction device, and the noise of the voice information received by the contents in the control room and the scanning room is greatly reduced by arranging the sound production noise reduction device and the sound production noise reduction device, so that the voice transmission quality is improved.

3. The control room transceiver antenna and the patient transceiver antenna are both directional antennas, and the transmitting power of the patient transceiver antenna is smaller than that of the control room transceiver antenna; the invention realizes the wireless transmission of the voice information between the control room and the scanning room through the control room transceiver and the patient transceiver, so that the structure of the communication system is simpler and the voice transmission distance is longer.

Drawings

FIG. 1 is a schematic block diagram of one embodiment of the present invention.

Fig. 2 is a schematic structural diagram of an air duct microphone earphone according to the present invention.

Fig. 3 is a noise reduction schematic diagram of an embodiment of the present invention.

Fig. 4 is a schematic block diagram of an embodiment of the invention (wireless connection).

Fig. 5 is a functional block diagram of an embodiment of the present invention (wired connection).

Fig. 6 is a schematic block diagram of an embodiment (noise reduction function) of the present invention.

Fig. 7 is a schematic block diagram of another embodiment (noise reduction function) of the present invention.

Fig. 8 is a schematic structural diagram of a communication system according to the present invention.

Fig. 9 is a schematic configuration diagram of a call system (with an airbag) of the present invention.

Fig. 10 is a schematic structural view of an airbag warning device of the present invention.

Fig. 11 is a block diagram schematically showing the composition of the directional transceiver unit of the present invention.

Fig. 12 is a diagram illustrating a channel design of the directional transceiver of the present invention at a radio frequency of 2400 MHz.

Fig. 13 is a schematic view of an antenna of the directional transceiver of the present invention.

Fig. 14 is a schematic diagram of a control room transceiver according to the present invention.

Figure 15 is a schematic diagram of the patient transceiver of the present invention.

Fig. 16 is a schematic view showing the structure of the alarming bladder attached to the sound collector of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, a noise reduction conversation system includes: an air duct microphone headset 300, an acoustic-electric conversion device 200, a patient transceiver 410 arranged in the scanning room 49D, and a transmitted-receiving device 100 and a control room transceiver 510 arranged in the control room 50D, wherein the sound emitted by the patient is connected with the acoustic-electric conversion device 200 through the air duct microphone headset 300, and the acoustic-electric conversion device 200 is in communication connection with the transmitted-receiving device 100 through the patient transceiver 410 and the control room transceiver 510;

the acoustic-electric conversion device 200 includes a noise reduction module that is bi-directionally connected to the air duct microphone headset 300 and the patient transceiver 410, respectively;

the receiving and transmitting device 100 includes a receiving and transmitting device microphone, a receiving and transmitting device amplifying circuit, a receiving and transmitting device loudspeaker, and a receiving and transmitting device sound wave concentrator connected in sequence, and the receiving and transmitting device sound wave concentrator is connected with the acoustoelectric conversion device 200 through an air conduit.

Specifically, when a person in the control room 50D needs to transmit voice information to a person in the scanning room 49D, the talked device 100 collects the voice information of the person in the control room 50D and converts it into an audio signal, and the control room transceiver 510 receives the audio signal transmitted by the talked device 100 and converts it into a wireless signal. The converted wireless signal is transmitted to the patient transceiver 410 through a wireless network, the patient transceiver 410 receives the wireless signal transmitted by the control room transceiver 510 and converts the wireless signal into an audio signal, the converted audio signal is converted into a sound signal by the sound-electricity conversion device 200 and transmitted to the air duct earphone 300, and a person wearing the air duct earphone 300 in the scanning room 49D can receive the voice information sent by a person in the corresponding control room 50D.

When a person in the scanning room 49D needs to transmit voice information to a person in the control room 50D, the air duct earphone 300 collects a sound signal formed by the voice information of the person in the scanning room 49D and transmits the sound signal to the acoustoelectric conversion device 200, the acoustoelectric conversion device 200 converts the sound signal into an audio signal and transmits the audio signal to the patient transceiver 410, and the patient transceiver 410 converts the audio signal into a wireless signal. The converted wireless signal is transmitted to the control room transceiver 510 through the wireless network, the control room transceiver 510 converts the wireless signal into a corresponding audio signal and transmits the audio signal to the receiving and transmitting device 100, the receiving and transmitting device 100 converts the audio signal into a corresponding sound signal and broadcasts the sound signal, and the person in the control room 50D can receive the voice information sent by the person in the scanning room 49D.

The control room transceiver 510 and the patient transceiver 410 can replace or shorten the audio cable between the talker device 100 and the acousto-electric transducer device 200 in the above embodiments, thereby reducing the wiring of the telephony system and making the structure of the telephony system simpler.

Air duct microphone earphone is as shown in fig. 2, air duct microphone earphone includes earphone frame 1D, earphone frame 1D's both sides all are equipped with pronunciation delivery outlet 2D, and arbitrary one side is equipped with a sound collector 4D, pronunciation delivery outlet 2D and sound collector 4D all are connected with the acoustoelectric conversion equipment through independent air conduit, and two pronunciation delivery outlets are connected with three 8D of air conduit through air conduit 5D, two 3D of air conduit respectively, sound collector 4D is connected with five 9D of air conduit through four 6D of air conduit, just three 8D of air conduit and five 9D mutual independence of air conduit, and with the acoustoelectric conversion equipment connects. A4D sound collector on be equipped with the vibrating diaphragm, the vibrating diaphragm is installed at sound wave concentrator main aspects, sound wave concentrator tip connect 6D's of air duct one end, four 6D of air duct install the transmission arm 25D at the adjustable position of can freely bending, transmission arm 25D make with plastics or with the stainless steel of elasticity copper product or with 318 or 316L material.

The middle of the air conduit microphone earphone is provided with an air conduit plug seat 10D which can be fixed in a plugging mode and can be replaced.

As shown in fig. 3, the noise reduction module includes a first noise reduction module 29A connected to a first microphone 28A for detecting ambient noise, a first noise reduction module 30A, a second noise reduction module 22A connected to a first speaker 17A connected to an air duct of a sound head 2A for collecting noise, a second noise reduction module 23A connected to a second microphone 6A connected to an air duct connected to a sound collector of an air duct microphone earphone.

A vibrating diaphragm is arranged in a sound collector of the air duct microphone earphone and is connected with a second microphone 6A with an amplifying port through an air duct, the second microphone 6A is connected with a third noise reduction module 9A through a metal shielding wire 7A, spectral signal-to-noise ratio algorithm processing is carried out through the third noise reduction module 9A, noise is filtered and is connected with a first control room comprehensive unit 26A located in a control room through a first filter 12A, and sound is output through a loudspeaker after processing.

The audio signal of the control room integration unit 26A in the control room is sent to the speaker 17A with the sound wave concentration port through the filter two 11A and the alternating current signal with the reverse phase waveform sent by the noise reduction module two 23A before being sent to the speaker 17A to cancel the noise received by the patient.

The vibration sound generated by the diaphragm collected by the sound head 2A for collecting the noise is sent to the third microphone 21A through the air duct, and the audio signal generated by the third microphone 21A is sent to the second noise reduction module 22A and the second noise reduction module 23A for noise reduction processing, and the generated anti-phase signal is sent to the first loudspeaker 17A. The third microphone 21A can also acquire noise, which plays a role in shortening time.

The first microphone 28A collects ambient noise, and performs feedforward active noise reduction through the first noise reduction module 29A and the first noise reduction module 30A to generate an anti-phase signal, which is sent to the first speaker 17A.

Wherein the patient's vocal noise reduction process:

the second patient sounding sound collector 3A is provided with a vibrating diaphragm and is connected to a second microphone 6A with an amplifying port through an air conduit B5A of the air conduit microphone 1A to form an air conduit microphone, an audio signal of the air conduit microphone is sent to a third patient sending noise reduction module 9A through a metal shielding wire 7A to be processed by a spectral signal-to-noise ratio algorithm, noise is filtered, human voice is sent to an amplifying circuit 13A-1 and a tuning processing of a controller 26A through an indoor and outdoor filter I12A, and then the speaker 13A sounds to be listened by control room personnel.

The power supply is provided by a regulated power supply or charged by a charger.

The control room can insert music into the communication channel of the patient at the same time, and can also close or regulate the volume at any time.

Wherein the process of noise reduction of the hearing of the patient:

the audio signal of the microphone 14A passes through the indoor and outdoor filter II 11A and is sent to the loudspeaker I17A with the sound wave concentration port by the lead to produce sound. The alternating current signal with the opposite phase waveform sent by the lead 24A before sending to the loudspeaker I17A is used for canceling the noise received by the patient. The vibration sound generated by the diaphragm in the sound head for offsetting the noise is sent to the third microphone 21A through the conduit C20A of the air conduit microphone, the audio signal of the third microphone 21A is sent to the second noise reduction module 22A and the second noise reduction module 23A through the conducting wire to generate a signal 27A with an opposite phase for noise reduction algorithm, and the signal 27A is sent to the first loudspeaker 17A through the conducting wire 24A to offset the noise signal, so that the sound heard by the patient achieves the noise reduction effect.

Wherein the ambient noise reduction process:

the first microphone 28A collects the ambient noise, and the first noise reduction module 30A performs a feedforward active noise reduction algorithm to generate an anti-phase signal, which is sent to the first speaker 17A to cancel the ambient noise.

As shown in fig. 4, the receiver-transmitter apparatus includes a microphone, a controller 56 and a control room transceiver 52 connected in sequence, the antenna 53 of the control room transceiver 52 is installed in the scanning room near the shielding wall 57 by passing through the shielding wall 57 via the filter three 51-3 by using the radio frequency cable 54, the acousto-electric conversion apparatus is connected to the patient transceiver 51-1, the patient transceiver 51-1 is provided with a patient transceiver antenna 51-2, and the control room transceiver antenna and the patient transceiver antenna are connected in communication.

The control room transceiver antenna 53 and the patient transceiver antenna 51-2 are both directional antennas, and the transmission power of the patient transceiver antenna 51-2 is less than the transmission power of the control room transceiver antenna 53.

A jack 27 in the socket 26 is connected with an air duct plug holder 10D of an air duct microphone earphone, one of two small holes in the jack 27 is connected with a small end of the sound wave concentrator 28 by an air duct 29-2, a loudspeaker 29 is arranged at a large end of the sound wave concentrator 28, a lead 29-3 of the loudspeaker 29 is connected with a plug 51-1, and the plug 51-1 is connected with a socket of a patient transceiver 51.

The other small hole of the jack 27 is connected to the amplifying port 30 by an air conduit 31-2, the microphone 31 is arranged at the large end of the amplifying port 30, the microphone 31 is connected with the noise reduction module 60, the noise reduction module 60 is connected with the other core wire of the plug 51-1 by a wire 31-3, and the plug 51-1 is connected with the socket of the patient transceiver 51.

Signals of the patient transceiver antenna 51-2 and signals of the control room transceiver antenna 53 are wirelessly exchanged, the control room transceiver antenna 53 is connected with the control room transceiver 52 through a radio frequency cable 54 and a filter 55, and audio signals obtained after signal processing are connected with the controller 56 through the control room transceiver 52 through a wire or a wire with a plug.

The patient's transceiver 51 is mounted outside the scan region of the nuclear magnetic resonance in order to achieve no effect on the scan.

The circuit of the patient transceiver 51 is selected from Bluetooth, the control room transceiver 52 is selected from a Bluetooth functional circuit and a device in a mobile phone, or the circuit and the device of the Bluetooth are also used, the power of an antenna is reduced, the transmitting distance is shortened, the transmitting and receiving frequency is selected so as to achieve the aim of not influencing the scanning work of the magnetic resonance, and the output power is required to meet the requirement.

The transmit power of the patient transceiver antenna 51-2 is less than the transmit power of the control room transceiver antenna 53, and is set to achieve no effect on the scanning of magnetic resonance, and the control room transceiver 52 is far away from the scanning area, so that the transmitted signal with a certain power can be attenuated to achieve no effect on the scanning quality of magnetic resonance.

The patient transceiver 51 and the control room transceiver 52 are powered by chargers or regulated power supplies.

As shown in fig. 5, the receiving and transmitting device and the acoustic-electric conversion device are connected by wire.

The receiving and transmitting device comprises a first receiving channel and a first transmitting channel, the sound-electricity conversion device comprises a second receiving channel and a second transmitting channel which are independent of each other, and the first receiving channel and the second transmitting channel and the first transmitting channel and the second receiving channel are connected through air ducts respectively.

The first receiving channel comprises a microphone five 18E with an amplifying port one 17E, an amplifying circuit one 16E and a loudspeaker two 15E which are connected in sequence;

the first speech channel comprises a third loudspeaker 12E with a sound wave concentrator 11E, a second amplifying circuit 13E and a sixth microphone 14E which are connected in sequence.

The second receiving channel comprises a shielding box I6E, a loudspeaker IV 5E with a sound wave concentrator I4E, an amplifying circuit III 7E and a microphone IV 8E with an amplifying port II 9E which are sequentially connected and positioned in the shielding box I6E, wherein the microphone IV 8E is connected with the first sending channel through an air conduit D10E, and the loudspeaker IV 5E is connected with a jack II 2E of the socket 27E through an air conduit E3E;

the second sending channel comprises a second shielding box 20E, a fifth loudspeaker 22E with a second sound wave concentrator 21E, a fourth amplifying circuit 23E and a eighth microphone 24E with a third amplifying port 25E, wherein the fifth loudspeaker 22E is connected with the first receiving channel through an air conduit F19E, and the microphone 25E is connected with a first jack 1E of the socket 27E through an air conduit G26E.

The third 12E of the loudspeaker of the host computer in the control room is sent to the seventh 8E of microphone in the shielding box 6E through the air conduit D10E with the sound wave concentrator 11E, said air conduit D10E and microphone seventh 8E have amplifying ports two 9E, said microphone seventh 8E produce the electrical signal and amplify the signal and send to the fourth 5E of loudspeaker to make the sound through the third 7E of the amplifying circuit, its sound is sent to the socket 27E through the air conduit E3E again through the first 4E of the sound wave concentrator, send to the air conduit earphone for the patient to listen by the socket 27E connection. The amplifier circuit and the speaker are all mounted in a shield case-6E.

The signal of the socket 27E of the air conduit earphone is transmitted to the microphone eight 24E through the air conduit G26E and the amplifying port three 25E, the microphone eight 24E transmits the electric signal to the amplifying circuit four 23E to be amplified and then transmits the electric signal to the loudspeaker five 22E to make sound, and the sound of the loudspeaker five 22E is transmitted to the microphone 17E in the host machine of the control room through the sound wave concentrator two 21E and the air conduit F19E. The wheat wind 17E is amplified by the first amplifying circuit 16E and then sent to the second loudspeaker 15E for the control room.

The amplifying circuit in the scanning room is powered by a battery, and the method has the opportunity of secondary amplification of the talking in the control room and the shielding room, and the amplifying function is improved. The air duct can be made smaller.

The

antennas

53E, 55E modulated by the transmitter/receiver 52E in the control room G and the transmitter/receiver 51-1 in the scanning shielding room F and configured respectively are arranged to transmit in a narrow transmission channel 51E having a certain width in one direction respectively, and exchange signals with each other in the narrow channel 51E. The narrow passage 51E is provided outside the scanning region 58E in the scanning room, in the shielding room F, thereby achieving a good effect of not affecting the scanning quality of the magnetic resonance.

The transmitter radio frequency circuit and the antenna adopt the prior technology of a transmitter and a receiver which are prevented from leaking signals and are ultra-secret, and the transceiver does not influence the work of electromagnetic electric signals or other active devices in the surrounding environment.

The transceiver 51-1 receives and transmits signals to and from the patient using an air duct microphone earpiece 59E to connect the patient. Thus, the passive non-magnetic state in the scanning area is ensured, and the scanning quality is ensured.

The third loudspeaker 12E of the host machine in the control room is sent to the seventh microphone 8E in the first shielding box 6E through the air duct D10E by the sound wave concentrator 11E, the second amplifying port 9E is arranged between the air duct D10E and the seventh microphone 8E, the noise reduction module 31E is arranged between the seventh microphone 8E and the third amplifying circuit 7E, the seventh microphone 8E generates an electric signal, the electric signal is subjected to noise reduction by the noise reduction module 31E and then is sent to the fourth loudspeaker 5E to generate sound by amplifying the signal by the third amplifying circuit 7E, the sound is sent to the socket 27E through the first sound wave concentrator 4E and then through the air duct E3E, and the sound is sent to the air duct earphone by the socket 27E to be connected with the air duct earphone to be heard by a patient. The amplifier circuit and the speaker are all mounted in a shield case-6E.

The socket 27E signal of the air conduit earphone is transmitted to the microphone eight 24E through the air conduit G26E and the amplifying port three 25E, the microphone eight 24E makes the electric signal noise reduced by the noise reduction module 30E and then transmits the electric signal to the amplifying circuit four 23E to be amplified and then transmits the electric signal to the loudspeaker five 22E to make sound, the sound of the loudspeaker five 22E is transmitted to the microphone five 18E arranged on the large end of the sound wave amplifying port one 17E in the main machine of the control room through the sound wave concentrator two 21E and the air conduit F19E. And the microphone five 18E is amplified by the amplifying circuit one 16E and then sent to the loudspeaker two 15E for the control room.

As shown in fig. 6, in an application manner of the noise reduction module, the second voice transmission channel includes a five shielding box 12F, and a five noise reduction module 11F, an amplifying circuit seven 13F, and a nine speaker 14F with a six acoustic wave concentrator 15F are sequentially connected and disposed in the five shielding box 12F, where a small end of the six acoustic wave concentrator 15F is connected to a small end of an amplifying port five 17F located outside the five shielding box 12F through an air duct 16F, a large end of the amplifying port five 17F is connected to a ten microphone 18F, another end of the five noise reduction module 11F is connected to a second wheat microphone 10F, and another end of the ten microphone 18F is connected to a fourth filter 19F; meanwhile, the fifth amplifying port 17F and the tenth microphone 18F are arranged in the shielding case 45F, the noise reduction module 46F is arranged on the outer side of the shielding case, and the noise reduction module 46F is connected with the tenth microphone 18F, so that a better noise reduction effect is achieved. The first speech channel includes a speaker ten 21F, a synthesizing unit three 20F, and a filter four 19F, which are connected in this order.

The second small microphone 10F is connected with the fifth noise reduction module 11F, the fifth noise reduction module 11F is connected with the seventh amplification circuit 13F through a conducting wire to amplify electric signals, the seventh amplification circuit 13F is connected with the ninth loudspeaker 14F, the ninth loudspeaker 14F is installed at the large end of the sixth sound wave concentrator 15F, the small end of the sixth sound wave concentrator 15F is connected with one end of the air duct 16F, the other end of the air duct 16F is connected with the sound wave amplifier 17F, the large end of the amplifier 17F is provided with the tenth microphone 18F, the tenth microphone 18F is connected with a conducting wire, the other end of the conducting wire is connected with the fourth filter 19F, the other end of the fourth filter 19F is connected with the third synthesis unit 20F in the control room, and the amplified sound sends signals to the tenth loudspeaker 21F to send sound to be heard by workers in the control room.

And the integrated unit III 20F of the control room is internally provided with the loudspeaker V21F.

The receiver and the amplifying circuit of the shielding room of the invention are isolated from the control room through the air conduit, so the scanning quality of the scanning room is not influenced by external signals.

As shown in fig. 7, the second voice transmission channel includes a third shielding box 22F and a fourth shielding box 32F, which are connected in sequence, a ninth microphone 28F with an amplifying port four 27F, a fifth amplifying circuit 29F, and a sixth loudspeaker 30F with a third acoustic wave concentrator 31F are arranged in the fourth shielding box 32F, which are connected in sequence, wherein the sixth loudspeaker 30F is connected to the second synthesis unit 34F through an air duct H33F, a fourth noise reduction module 36F, a sixth amplifying circuit 23F, and a seventh loudspeaker 24F with a fourth acoustic wave concentrator 25F are arranged in the third shielding box 22F, which are connected in sequence, wherein a small end of the fourth acoustic wave concentrator 25F is connected to a small end of the fourth amplifying port 27F through an air duct, and the other end of the fourth noise reduction module 36F is connected to the first wheat microphone 40F;

the first speech channel comprises a loudspeaker eight 35F and a second synthesis unit 34F which are connected in sequence.

The scan screening room staff is isolated with a 2-level transmitter:

the first small microphone 40F is connected with the fourth noise reduction module 36F, the fourth noise reduction module 36F is connected with the sixth amplifying circuit 23F, the sixth amplifying circuit 23F is connected with the seventh loudspeaker 24F, the seventh loudspeaker 24F is installed at the large end of the fourth sound wave concentrator 25F, the small end of the fourth sound wave concentrator 25F is connected with the air conduit 26F, the other end of the air conduit 26F is connected with the sound wave amplifier 27F, the large end of the sound wave amplifier 27F is installed with the ninth microphone 28F, the ninth microphone 28F is connected with the fifth amplifying circuit 29F by a lead, the fifth amplifying circuit 29F is connected with the sixth loudspeaker 30F by a lead, the sixth loudspeaker 30F is installed at the large end of the third sound wave concentrator 31F, the small end of the third sound wave concentrator 31F is connected with the air conduit H33F, and the other end of the air conduit H33F passes through the shielding wall 37F and is connected with the second control room comprehensive unit 34F, and played by speaker eight 35F for the control room staff to listen to.

Meanwhile, the small microphone is arranged, so that the hands-free effect can be realized.

As shown in fig. 8, the

antennas

53E and 55E modulated and respectively configured by the transmitter and receiver 52E in the control room G and the transmitter and receiver 51-1 in the scanning shielded room F are arranged to transmit in a narrow transmission channel 51E having a certain width in a single direction, respectively, and exchange signals with each other in the narrow transmission channel 51E. The narrow passage 51E is provided outside the scanning region 58E in the scanning room, in the shielding room F, thereby achieving a good effect of not affecting the scanning quality of the magnetic resonance.

The directional transceiver radio frequency circuit and antenna can be used as directional transceiver without affecting the operation of the electromagnetic signal or other active devices in the surrounding environment.

In this embodiment, the acoustic wave conversion device is disposed in the patient transceiver, and the air duct microphone earpiece 59E is connected to the patient transceiver through an air duct.

As shown in figure 9, an airbag 60E is added to figure 8, the airbag 60E is connected to the patient transceiver 51-1 via an air conduit 61E, and a compression alarm signal is transmitted via the patient transceiver antenna.

Wherein one path of the air duct microphone earpiece 59E is connected to the small end of the sound concentrator 28D through an air duct, the large end of the sound concentrator 2D8 is fitted with a speaker 29D, and the lead of the speaker 29D is connected to the patient transceiver 51-1.

The other path of the air conduit microphone earphone 59E is connected to the amplifying port 30D by an air conduit, the microphone 31D is installed at the large end of the amplifying port 30D, the conducting wire of the microphone 31D is connected with the noise reduction module 32D, and the other end of the noise reduction module 32D is connected with the patient transceiver 51-1.

As shown in fig. 10, the patient transceiver is provided with a wirelessly transmitted airbag alarm device; the wireless-transmitting safety airbag alarming device is provided with a safety airbag ball 1F; the patient transceiver is provided with a pneumatic switch 4F and a control alarm circuit 8F; one end of the control alarm circuit 8F is connected with the pneumatic switch 4F; the other end of the pneumatic switch 4F is connected with an air conduit through a plug-in connector 2F, the other end of the air conduit is connected with an air bag ball, and the other end of the control alarm circuit is connected with a comprehensive service processing unit of a patient transceiver;

one end of the control alarm circuit 8F is connected with the pneumatic switch 4F; the other end of the pneumatic switch 4F is connected with an air conduit 3F through an air conduit connector 2F, and the other end of the air conduit 3F is connected with an airbag ball 1F; the other end of the control alarm circuit 8F is connected to the integrated service processing unit of the patient transceiver.

The control alarm circuit 8F is provided with a singlechip 5F and a signal amplification driving circuit 6F, and the singlechip 5F is connected with the signal amplification driving circuit 6F.

The alarm signal generated by the singlechip 5F passes through the integrated service processing unit 7F of the patient transceiver, the baseband processing component, the directional antenna of the transceiving front-end component and the directional antenna 51-2 of the control room transceiver in sequence to exchange signals, and the signals are processed by the control room transceiver to send out alarm sound.

As shown in fig. 11, which is a schematic structural diagram of a directional transceiver in a call system, a control room transceiver (such as the control room transceiver 510 or the transceiver 52E in the above embodiment) and a patient transceiver (such as the patient transceiver 410 or the transceiver 51-1 in the above embodiment) are directional transceivers, both of which have the same structure, and the directional transceiver is composed of the following units: the signals processed by the integrated service pass through the DAC unit, pass through zero intermediate frequency conversion, pass through the power amplifier, and pass through the receiving and transmitting switch to the antenna for directional transmission. The received signal is passed as follows: the antenna receives signals from the directional channel, the signals pass through the receiving and transmitting switch, the amplitude limiting and the LAN + filtering, and then the signals pass through the zero intermediate frequency conversion and the ADC of the baseband processing component to be processed by the comprehensive service.

The main indicators of the high-frequency part of the directional transceiver with the transmitting frequency of 2400MHz are as follows:

1) the working frequency is as follows: 2400MHz-2485 MHz;

2) input signal level: -107 to-16.5 dBm;

3) receiver noise figure: less than or equal to 4.0 dB;

4) rated output power of the transmitter: 31.5 dBm;

5) antenna gain: not less than 9 dBi;

6) beam width: 30 mouths (typical value);

7) the communication distance is 10 meters.

The transceiver channel is designed as shown in fig. 12, the width of the radio frequency channel of the transceiver is within the tolerance of ± 15 °, the antenna length is about 190mm, the width is 60mm, and the shape is shown in fig. 13.

Both the control room transceiver antenna 418 and the patient transceiver antenna 51-2 are directional antennas with a length of 190mm and a width of 60 mm. The directional antenna does not affect the operation of its surrounding electromagnetic signals or other active devices.

As shown in figures 14 and 15 of the drawings,

the control room transceiver 52 comprises a control room transceiver integrated service processing unit 411, a control room transceiver analog-to-digital conversion unit 412, a control room transceiver digital-to-analog conversion unit 413, a control room transceiver zero intermediate frequency conversion unit 414, a control room transceiver amplitude limiting and filtering unit 415, a control room transceiver power amplification unit 416, a control room transceiver switch 417 and a control room transceiver antenna 418;

the patient transceiver 51-1 comprises a patient transceiver integrated service processing unit 511, a patient transceiver analog-to-digital conversion unit 512, a patient transceiver digital-to-analog conversion unit 513, a patient transceiver zero intermediate frequency conversion unit 514, a patient transceiver amplitude limiting and filtering unit 515, a patient transceiver power amplification unit 516, a patient transceiver transmit-receive switch 517 and a patient transceiver antenna 51-2;

the audio signal transmitted by the receiving and transmitting device is processed by the control room transceiver integrated service processing unit 411, the control room transceiver analog-digital conversion unit 412, the control room transceiver zero intermediate frequency conversion unit 414, the control room transceiver power amplification unit 416, the control room transceiver switch 417 and the control room transceiver antenna 418 in sequence and then converted into a wireless signal, and the wireless signal is directionally transmitted to the patient transceiver antenna 51-2 through the control room transceiver antenna 418; the wireless signals received by the patient transceiver antenna 51-2 and transmitted by the control room transceiver antenna 418 in a directional manner are processed by a patient transceiver transceiving switch 517, a patient transceiver amplitude limiting and filtering unit 515, a patient transceiver zero intermediate frequency conversion unit 514, a patient transceiver analog-to-digital conversion unit 512 and a patient transceiver integrated service processing unit 511 in sequence and then converted into audio signals for transmission to the acousto-electric conversion device;

the audio signal transmitted by the sound-electricity conversion device is processed by the patient transceiver comprehensive service processing unit 511, the patient transceiver digital-to-analog conversion unit 513, the patient transceiver zero intermediate frequency conversion unit 514, the patient transceiver power amplification unit 516, the patient transceiver receiving and transmitting switch 517 and the patient transceiver antenna 51-2 in sequence, then converted into a wireless signal, and directionally transmitted to the control room transceiver antenna 418 by the patient transceiver antenna 51-2; the wireless signal received by the control room transceiver antenna 418 and transmitted by the patient transceiver antenna 51-2 in a directional manner is processed by the control room transceiver switch 417, the control room transceiver amplitude limiting and filtering unit 415, the control room transceiver zero intermediate frequency conversion unit 414, the control room transceiver digital-to-analog conversion unit 412 and the control room transceiver integrated service processing unit 411, and then converted into an audio signal for transmission to the receiving and transmitting device.

As shown in figure 16 of the drawings,

the additional air bag alarm is provided for a patient who cannot speak, a gas sound generator 36A is arranged on the sound receiving surface of a sound collector I4D of an air duct microphone earphone and covered by a cover 34A, the cover 34A is movably arranged on the sound collector I4D, and when the gas sound generator 36A is not used, the cover 34A is opened to take the gas sound generator 36A and the air bag 38A;

if the patient presses the air bag 38A several times when the patient needs to communicate with the control room physician, the air from the air bag 38A transmits air pressure to the air sound generator 36A through the air conduit I37A, the air sound generator 36A generates an alarm sound and transmits the alarm sound to the first sound collector 4D, and the first sound collector 4D transmits the alarm sound to the control room transceiver in a wireless signal mode through the patient transceiver via the air conduit microphone earphone.

Or the air duct microphone earphone of the air bag alarm attached to the sound collector is directly plugged into the socket 27E in the figure 5 by the air duct plug seat 10D, and the alarm signal is transmitted to the control room by the sound-electricity conversion device.

The examples should not be construed as limiting the present invention, but any modifications made based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. A noise reduction communication system, comprising: it includes:

a receiving/transmitting device (100) provided in the control room;

an acoustoelectric conversion device (200) arranged in the scanning room and an air duct microphone earphone (300) connected with the acoustoelectric conversion device,

the receiving and transmitting device (100) is connected with the sound-electricity conversion device (200), the air duct microphone earphone (300) is used for voice communication between a control room (50D) and a scanning room (49D),

and the noise reduction module is arranged after the acoustic signals of the air duct microphone earphone (300) and the acoustic-electric conversion device (200) are converted into electric signals.

2. A noise reduction conversation system according to claim 1, wherein: air conduit microphone earphone (300) include earphone frame (1D), the both sides of earphone frame (1D) all are equipped with pronunciation delivery outlet (2D), and arbitrary one side is equipped with sound collector (4D), pronunciation delivery outlet (2D) and sound collector (4D) all are connected with reputation conversion equipment (200) through independent air conduit.

3. A noise reduction conversation system according to claim 2, wherein: two pronunciation delivery outlets are connected with air conduit three (8D) through air conduit one (5D), air conduit two (3D) respectively, sound collector one (4D) is connected with air conduit five (9D) through air conduit four (6D), just air conduit three (8D) and air conduit five (9D) are independent each other, and with sound electricity conversion equipment (200) are connected.

4. A noise reduction conversation system according to claim 1, 2 or 3, wherein: the middle of the air duct microphone earphone (300) is provided with an air duct plug seat (10D).

5. A noise reduction conversation system according to claim 1, 2 or 3, wherein: the noise reduction module comprises a first noise reduction module (29A) connected with a first microphone (28A) for detecting environmental noise, a first noise reduction module (30A), a second noise reduction module (22A) connected with a first loudspeaker (17A), a second noise reduction module (23A) and a third noise reduction module (9A) connected with a second microphone (6A), wherein the first loudspeaker (17A) is connected with an air duct A (19A) of a sound head (2A) for collecting noise, and the second microphone (6A) is connected with an air duct B (5A) connected with a second sound collector (3A) of an air duct microphone earphone (300).

6. A noise reduction conversation system according to claim 5, wherein: a vibrating diaphragm is arranged in a second sound collector (3A) of the air duct microphone earphone (300) and is connected with a second microphone (6A) with an amplifying port through an air duct B (5A), the second microphone (6A) is connected with a third noise reduction module (9A) through a metal shielding wire (7A), spectral signal-to-noise ratio algorithm processing is carried out through the third noise reduction module (9A), and noise is filtered and is connected with a first comprehensive unit (26A) located in a control room through a first filter (12A).

7. A noise reduction conversation system according to claim 5, wherein: the audio signal of the first synthesis unit (26A) in the control room is sent to the first loudspeaker (17A) with the sound wave concentration port through the second filter (11A) and is sent to the first loudspeaker (17A) through the second noise reduction module (23A) before being sent to the first loudspeaker (17A), and the alternating current signal with the opposite phase waveform is sent to counteract the noise received by the patient.

8. A noise reduction conversation system according to claim 7, wherein: the vibration sound generated by the diaphragm collected by the sound head (2A) for collecting the noise is sent to the third microphone (21A) through the air conduit C (20A), and the audio signal generated by the third microphone (21A) is sent to the second noise reduction module (22A) and the second noise reduction module (23A) for noise reduction processing, and the generated anti-phase signal is sent to the first loudspeaker (17A).

9. A noise reduction conversation system according to claim 5, wherein: the first microphone (28A) collects ambient noise, and performs feed-forward active noise reduction through the first noise reduction module (29A) and the first noise reduction module (30A) to generate a phase-reversal signal, and the phase-reversal signal is sent to the first loudspeaker (17A).

10. A noise reduction conversation system according to claim 1, wherein: the receiving and transmitting device (100) is wirelessly connected with the sound-electricity conversion device (200).

11. A reduced noise communication system as defined in claim 10, wherein: the receiving and transmitting device (100) comprises a microphone four (61), a control machine (56) and a control room transceiver (52) which are sequentially connected, an antenna (53) of the control room transceiver (52) penetrates through a shielding wall (57) through a radio frequency cable (54) and a filter three (51-3) to be installed in a scanning room close to the shielding wall, the sound-electricity conversion device (200) is connected with a patient transceiver (51-1), the patient transceiver (51-1) is provided with a patient transceiver antenna (51-2), and the control room transceiver antenna and the patient transceiver antenna form communication connection.

12. A reduced noise communication system as defined in claim 11, wherein: the control room transceiver antenna (53) and the patient transceiver antenna (51-2) are both directional antennas, and the transmission power of the patient transceiver antenna (51-2) is less than that of the control room transceiver antenna (53).

13. A noise reduction conversation system according to claim 1, wherein: the receiving and transmitting device (100) and the sound-electricity conversion device (200) are connected by a wire.

14. A reduced noise communication system as defined in claim 13, wherein: the receiving and transmitting device (100) comprises a first receiving channel and a first transmitting channel, the sound-electricity conversion device (200) comprises a second receiving channel and a second transmitting channel which are independent of each other, and the first receiving channel and the second transmitting channel and the first transmitting channel and the second receiving channel are connected through air ducts respectively.

15. A reduced noise communication system as defined in claim 14, wherein: the first receiving channel comprises a microphone five (18E) with an amplifying port I (17E), an amplifying circuit I (16E) and a loudspeaker II (15E) which are connected in sequence;

the first voice transmission channel comprises a third loudspeaker (12E) with a sound wave concentrator (11E), a second amplifying circuit (13E) and a sixth microphone (14E) which are connected in sequence.

16. A reduced noise communication system as defined in claim 14, wherein: the second telephone receiving channel comprises a first shielding box (6E), a fourth loudspeaker (5E) with a first sound wave concentrator (4E), a third amplifying circuit (7E) and a seventh microphone (8E) with a second amplifying port (9E), wherein the fourth loudspeaker (5E) is positioned in the first shielding box (6E) and is sequentially connected with the fourth loudspeaker (5E) with the first sound wave concentrator (4E), the seventh microphone (8E) is connected with the first telephone receiving channel through an air conduit D (10E), and the fourth loudspeaker (5E) is connected with a second jack (2E) of the socket (27E) through an air conduit E (3E);

the second sending channel comprises a second shielding box (20E), a fifth loudspeaker (22E) with a second acoustic wave concentrator (21E), a fourth amplifying circuit (23E) and an eighth microphone (24E) with a third amplifying port (25E), wherein the fifth loudspeaker (22E) is sequentially connected with the second shielding box (20E), the fourth amplifying circuit (23E) and the eighth microphone (24E) are positioned in the second shielding box (20E), the fifth loudspeaker (22E) is connected with the first receiving channel through an air conduit F (19E), and the eighth microphone (24E) is connected with a first jack (1E) of the socket (27E) through an air conduit G (26E).

17. A noise reducing conversation system according to claim 11 or 12, wherein: the control room transceiver (52) comprises a control room transceiver integrated service processing unit (411), a control room transceiver analog-to-digital conversion unit (412), a control room transceiver digital-to-analog conversion unit (413), a control room transceiver zero intermediate frequency conversion unit (414), a control room transceiver amplitude limiting filtering unit (415), a control room transceiver power amplification unit (416), a control room transceiver transceiving switch (417) and a control room transceiver antenna (418);

the patient transceiver (51-1) comprises a patient transceiver integrated service processing unit (511), a patient transceiver analog-to-digital conversion unit (512), a patient transceiver digital-to-analog conversion unit (513), a patient transceiver zero intermediate frequency conversion unit (514), a patient transceiver amplitude limiting filtering unit (515), a patient transceiver power amplification unit (516), a patient transceiver transceiving switch (517) and a patient transceiver antenna (51-2);

the audio signal transmitted by the receiving and transmitting device (100) is processed by the control room transceiver integrated service processing unit (411), the control room transceiver analog-to-digital conversion unit (412), the control room transceiver zero intermediate frequency conversion unit (414), the control room transceiver power amplification unit (416), the control room transceiver switch (417) and the control room transceiver antenna (418) in sequence and then converted into a wireless signal, and the wireless signal is directionally transmitted to the patient transceiver antenna (51-2) through the control room transceiver antenna (418); the wireless signals received by the patient transceiver antenna (51-2) and transmitted by the control room transceiver antenna (418) in a directional manner are processed by a patient transceiver transceiving switch (517), a patient transceiver amplitude limiting and filtering unit (515), a patient transceiver zero intermediate frequency conversion unit (514), a patient transceiver analog-to-digital conversion unit (512) and a patient transceiver comprehensive service processing unit (511) in sequence and then converted into audio signals for transmission to the sound-to-electricity conversion device (200);

audio signals transmitted by the sound-electricity conversion device (200) are processed by the patient transceiver comprehensive service processing unit (511), the patient transceiver digital-to-analog conversion unit (513), the patient transceiver zero intermediate frequency conversion unit (514), the patient transceiver power amplification unit (516), the patient transceiver receiving switch (517) and the patient transceiver antenna (51-2) in sequence, converted into wireless signals, and directionally transmitted to the control room transceiver antenna (418) through the patient transceiver antenna (51-2); the wireless signals received by the control room transceiver antenna (418) and transmitted by the patient transceiver antenna (51-2) in a directional mode are processed by a control room transceiver receiving and transmitting switch (417), a control room transceiver amplitude limiting and filtering unit (415), a control room transceiver zero intermediate frequency conversion unit (414), a control room transceiver analog-to-digital conversion unit (412) and a control room transceiver comprehensive service processing unit (411) in sequence and then converted into audio signals for transmission to the receiving and transmitting device (100).

18. A noise reducing conversation system according to claim 11 or 12, wherein: the patient transceiver and the control room transceiver are both provided with antennas for configuration modulation of a transmitting circuit, the antennas are directional narrow transmitting channel antennas, a narrow channel (51E) is arranged between the patient transceiver and the control room transceiver, and the antennas transmit in the narrow channel and perform signal exchange.

19. A reduced noise communication system as defined in claim 18, wherein: the narrow channel (51E) is located outside the scanning area.

20. A reduced noise communication system as defined in claim 11, wherein: the patient transceiver is provided with a wireless-transmitting airbag alarm device; the wireless-transmitting safety airbag alarming device is provided with a safety airbag ball (1F); the patient transceiver is provided with a pneumatic switch (4F) and a control alarm circuit (8F); one end of the control alarm circuit (8F) is connected with the pneumatic switch (4F); the other end of the pneumatic switch (4F) is connected with an air conduit through a plug connector (2F), the other end of the air conduit is connected with an air bag ball, and the other end of the control alarm circuit is connected with a comprehensive service processing unit of a patient transceiver.

21. A reduced noise communication system as defined in claim 14, wherein: the second voice transmission channel comprises a third shielding box (22F) and a fourth shielding box (32F) which are connected in sequence, wherein a ninth microphone (28F) with an amplifying port four (27F), a fifth amplifying circuit (29F) and a sixth loudspeaker (30F) with a sound wave concentrator three (31F) which are connected in sequence are arranged in the fourth shielding box (32F), the sixth loudspeaker (30F) is connected with the fifth amplifying circuit (29F) through an air conduit H (33F), a fourth noise reduction module (36F), a sixth amplifying circuit (23F) and a seventh loudspeaker (24F) with a sound wave concentrator four (25F) which are connected in sequence are arranged in the third shielding box (22F), the small end of the sound wave concentrator four (25F) is connected with the small end of the amplifying port four (27F) through an air conduit, and the other end of the fourth noise reduction module is connected with the first wheat microphone (40F);

the first speech channel comprises a loudspeaker eight (35F) and a synthesis unit two (34F) which are connected in sequence.

22. A reduced noise communication system as defined in claim 14, wherein: the second voice transmission channel comprises a shielding box five (12F), a noise reduction module five (11F), an amplification circuit seven (13F) and a loudspeaker nine (14F) with a sound wave concentrator six (15F) which are sequentially connected are arranged in the shielding box five (12F), wherein the small end of the sound wave concentrator four (25F) is connected with the small end of an amplification port five (17F) positioned on the outer side of the shielding box through an air conduit, the large end of the amplification port five (17F) is connected with a microphone ten (18F), the other end of the noise reduction module five is connected with a wheat microphone two (10F), and the other end of the microphone ten (18F) is connected with a filter four (19F);

the first speech channel includes a speaker ten (21F), a synthesizing unit three (20F), and a filter four (19F) connected in this order.

23. A noise reduction conversation system according to claim 1, 2 or 3, wherein: the air conduit microphone earphone (300) is made of no metal material from the head bow to the air conduit plug seat.

24. A reduced noise communication system as defined in claim 14, wherein: an additional air bag alarm is provided for a patient who cannot speak, an air sound generator (36A) is arranged on the sound receiving surface of a sound collector I (4D) of an air duct microphone earphone (300) and is covered by a shell (34A), the shell (34A) is movably arranged on the sound collector I (4D), and when the air sound generator (36A) is not used, the shell (34A) is opened to take out the air sound generator (36A) and an air bag (38A);

if a patient needs to contact with a doctor in a control room, the air bag (38A) is pressed down, air pressure is transmitted to the air sound generator (36A) through the air conduit I (37A) by air of the air bag (38A), the air sound generator (36A) generates alarm sound, the alarm sound is transmitted to the first sound collector (4D), and the alarm sound received by the first sound collector (4D) transmits an alarm signal to the control room through the air conduit microphone earphone (300) through the patient transceiver or the sound-electricity conversion device (200).