CN209845282U

CN209845282U - Circuit device capable of being used for hearing detection

Info

Publication number: CN209845282U
Application number: CN201920510295.5U
Authority: CN
Inventors: 胡拥军; 张大伟; 王浩; 温新国; 于宁
Original assignee: China Assistive Devices And Technology Center For Persons With Disabilities; Wuhan Douting Technology Co Ltd
Current assignee: China Assistive Devices And Technology Center For Persons With Disabilities; Wuhan Douting Technology Co Ltd
Priority date: 2019-04-15
Filing date: 2019-04-15
Publication date: 2019-12-24
Anticipated expiration: 2029-04-15

Abstract

The utility model relates to a circuit field provides a circuit arrangement that can be used for hearing to detect, include: a control circuit comprising a processor; the Bluetooth module is used for receiving audio files from the outside, and the output end of the Bluetooth module is connected to the control circuit; the digital-to-analog conversion circuit is used for converting the audio file output by the control circuit into an analog signal, and the digital-to-analog conversion circuit is connected to the output end of the control circuit; and the input end of the digital-to-analog conversion circuit is connected to the output end of the digital-to-analog conversion circuit. The utility model discloses can cooperate the procedure on the panel computer to carry out the hearing and detect. The novel testing equipment and the testing method are provided, so that a non-professional person can also use the intelligent hearing screening instrument to test hearing for a common person, screen out a person with hearing impairment and monitor the current hearing situation of the person with hearing impairment.

Description

Circuit device capable of being used for hearing detection

Technical Field

The present invention relates to a circuit device, and more particularly, to a circuit device that can be used for hearing test.

Background

The hearing detector is a common device for detecting hearing of an otolaryngologist, the existing hearing detection devices are all used by professionals such as doctors, and patients only need to go to a hospital to detect hearing.

With the continuous development of IT information technology and the continuous increase of internet speed, client application software (APP) based on an APPLE mobile phone and an Android mobile phone system is gradually started, various mobile phone client applications are gradually familiar to the public, and bluetooth is accepted by the public as a communication mode and popularization to complete medical detection and remote diagnosis through networks and mobile phone applications. Current hearing technologies suffer from the following disadvantages:

firstly, the method comprises the following steps: at present, the hearing test equipment which is commonly used has strong professional, and is used by professional personnel, and ordinary people can only go to hospitals to test hearing. The utility model discloses pass through bluetooth wireless connection to panel computer with ear muff formula earphone, APP through panel computer realizes the hearing test, and the interface is friendly, easy operation, and the output result is directly perceived, lets non-professional also can use.

Secondly, the method comprises the following steps: traditional hearing test equipment, it is bulky, need external power supply, each annex peripheral equipment all adopts wired connection, can only put in the hospital the inside, the utility model discloses an earmuff formula earphone and flat board all are lithium cell power supply, need not external power supply, and it is also very convenient to carry out the diagnosis for the professional such as the doctor.

Thirdly, performing secondary filtration; traditional hearing test equipment, non-intelligent, the network of not connecting to, the utility model discloses realize the intellectuality, the networking, its diagnostic result can be printed out in real time through wireless bluetooth printer promptly, accessible wireless network connection is to remote data again, provides long-range medical diagnosis mode for the doctor to the accessible screens data, makes statistics of, excavates etc. provides a big data analysis method.

Fourthly: the conventional apparatus does not have the processing means of making an uproar, the utility model discloses a physics is fallen and is fallen the mode of making an uproar that falls like the combination of making an uproar with the electron, has better suppression to ambient noise, can use at the great social environment of noise.

SUMMERY OF THE UTILITY MODEL

In view of the problems in the background art,

the utility model provides a new test equipment and test means lets non-professional personage also can utilize intelligent hearing screening appearance for general people test hearing, screens out personage that the hearing is obstructed to monitor hearing personage's hearing current situation.

The utility model discloses a circuit arrangement that can be used for hearing to detect includes: a control circuit comprising a processor; the Bluetooth module is used for receiving audio files from the outside, and the output end of the Bluetooth module is connected to the control circuit; the digital-to-analog conversion circuit is used for converting the audio file output by the control circuit into an analog signal, and the digital-to-analog conversion circuit is connected to the output end of the control circuit; the input end of the digital-to-analog conversion circuit is connected to the output end of the digital-to-analog conversion circuit; and the input end of the noise reduction circuit is connected to the output end of the volume control circuit.

Optionally, the circuit arrangement capable of being used for hearing test comprises: and the input end of the audio amplification circuit is connected to the output end of the noise reduction circuit.

Optionally, the circuit arrangement capable of being used for hearing test comprises: an earphone connected to the audio amplification circuit.

Optionally, the circuit arrangement capable of being used for hearing test comprises: the earphone is an earmuff type earphone, and a battery for supplying power to the circuit device is arranged in the earphone.

Optionally, the circuit arrangement capable of being used for hearing test comprises: an LED light connected to the control circuit and capable of illuminating when the Bluetooth module is transmitting data.

Optionally, the control circuit includes a processor, the processor is a chip STM32F105RCT6, the analog-to-digital conversion circuit includes a chip CS4334, the volume control circuit includes a chip PGA2311, and the noise reduction circuit includes a chip AS 3415.

Optionally, the audio amplifying circuit includes a chip LM 4991.

The utility model provides a circuit arrangement that can be used for hearing to detect connects the panel computer with ear muff formula earphone, carries out the hearing test, and accessible bluetooth printer prints out the test result, also can upload the test result through the network. The utility model discloses a non-professional personage provides a hearing test means. Ear muff formula earphone, the flat board, the printer all adopts lithium cell power supply through wireless connection, conveniently carries.

The beneficial effect of this application does:

1) the novel testing equipment and the testing method are provided, the hearing test can be carried out on the tablet personal computer by using the earmuff type earphones through simple operation, and non-professional persons can use the testing equipment and the testing method easily.

2) The system can be connected with a network to support remote automatic calibration.

3) Ear muff formula earphone with the utility model discloses a circuit arrangement all is the lithium cell power supply, need not external power supply, conveniently carries.

4) The earmuff type earphone part adopts a noise reduction mode combining physical noise reduction and electronic noise reduction, the noise reduction reaches more than 20dB, the environmental noise is well inhibited, and the test precision reaches +/-5 dB under the condition that the environmental noise is less than 50 dB.

5) Supported frequency range: 125-8000 KHz, frequency tolerance: plus or minus 1%, total harmonic distortion < 2.5%.

6) The audiometry of 125, 250, 500, 750, 1000, 1500, 2000, 3000, 4000, 6000, 8000Hz frequencies is supported, and the user can select the testable frequency.

7) Hearing range: 25-100 dBHL.

8) To support masked audiometry, a masking sound should provide at least enough pure tones on the same ear to mask 60dB at 250Hz, 75dB at 500Hz, and 80dB at 1kHz to 4kHz levels.

Drawings

Fig. 1 is a schematic circuit diagram of the circuit arrangement for hearing test according to the present application.

FIG. 2 is a circuit diagram of one embodiment of a processor in the circuit arrangement of FIG. 1.

Fig. 3 is a circuit diagram of a control circuit of the circuit arrangement in fig. 2.

Fig. 4 is a circuit diagram of the bluetooth module in fig. 2.

FIG. 5 is a flow chart of a method of operating a hearing test instrument.

Detailed Description

Embodiments of the present invention will now be described with reference to the drawings, wherein like parts are designated by like reference numerals. The embodiments described below and the technical features of the embodiments may be combined with each other without conflict.

Fig. 1 is a schematic block circuit diagram of a hearing screening instrument of the present invention, which includes a control circuit including a processor MCU, for example, using STM32F105RCT6, as shown in fig. 2-3.

The control circuit is connected to the Bluetooth module, is wirelessly connected with the Bluetooth module of the tablet computer through the Bluetooth module, and receives test data sent by the tablet computer. The Bluetooth module is a PCBA board integrating the Bluetooth function, is used for short-distance wireless communication, and is divided into a Bluetooth data module and a Bluetooth voice module according to functions. The Bluetooth headset with the noise reduction function in the prior art has no built-in Bluetooth voice module, but can only play simple audio, cannot realize data interaction with a panel, is low in precision and high in distortion degree, and cannot perform hearing test. This application adopts bluetooth data module, through control circuit realizes the data exchange with the panel computer. The Bluetooth module of each product has an independent MAC address, and multiple devices can share the same flat board for test application through connection setting, and the Bluetooth module adopted in the application is as shown in figure 4.

The control circuit is connected with a digital-to-analog conversion circuit, for example, a chip CS4334 is adopted, and the packaging volume of the chip is small. And the digital-to-analog converter receives the data processed by the control circuit.

The digital-to-analog conversion circuit is connected with a volume control circuit, for example, a chip PGA2311 is used, and an analog audio signal converted by the digital-to-analog converter is transmitted to the volume control circuit to control the volume. Because the hearing level needs to be adjustable for hearing detection, a volume control circuit is provided for volume control to adjust the final output sound pressure.

The volume control circuit is connected to a noise reduction circuit, for example using a chip AS3415, which processes the signal output by the volume control circuit. The noise reduction chip AS3415 can provide 20dB electronic noise reduction, and the noise reduction of the whole earmuff type earphone can reach more than 50dB due to the physical noise reduction design of the earmuff type earphone. Performing noise reduction processing is not known in the art.

The noise reduction circuit is connected with an audio amplification circuit, and the noise-reduced signal is amplified by the audio amplification circuit and then sent to the earphone for output. The audio amplifying circuit comprises a power amplifier chip LM4991, and is small in distortion, small in size and high in output power.

The circuit arrangement further comprises a headphone, connected to the audio amplification circuit. The PCB of the circuit device and the battery part for supplying power are arranged in the structure of the ear muff type earphone, and a flat plate between the PCB and the battery part does not have a connecting wire, and an external power supply is not needed. For example, the power supply can be supplied by a lithium battery, a +3.3V, +5V and-5V power supply is required on the board, DC-DC conversion is realized by LT3462 and TPS561201 respectively, and the two chips are safe and reliable, small in size and high in conversion efficiency.

FIG. 5 is a flow chart of a method of operating a hearing test instrument. Wherein, the hearing detector includes the utility model discloses a circuit arrangement, circuit arrangement includes the LED lamp, and when the standby, built-in LED sends out the red light and instructs, works as when circuit arrangement's bluetooth module and panel computer intercommunication, when being in hearing test state, built-in LED sends out green light and instructs, and when shutting down, no pilot lamp is bright.

When circuit intelligence hearing screening appearance starts the back, opens the APP that corresponds on the panel computer, logs in through user name and password according to different users, then can search for the bluetooth module address of earphone through APP, sets up the connection and can connect intelligence hearing screening appearance and panel computer. The data transmission, the volume control and the noise reduction switch of the circuit device are all realized through a flat built-in APP (application program).

Tablet computer with circuit arrangement connects the back, and the user can set up and carry out the pure tone test, in pure tone test interface, can carry out sound pressure level intensity and keep, and automatic frequency jumps, and frequency selection, intensity step-by-step size, whether have setting such as shielding sound, then the user wears the earphone, selects the test in APP, begins the test, and the tablet computer sends test audio data to intelligent hearing screening appearance, intelligent hearing screening appearance circuit arrangement's control circuit gives digital analog conversion circuit with bluetooth module received audio data according to the IIS agreement, and digital analog conversion circuit converts received audio data into audio analog signal, sends the sound production part through audio amplifier circuit and broadcasts. The user responds in the APP according to the heard audio until the test is finished, and then the APP displays and stores the result. The user also can select to connect WIFI, prints the result or uploads the result to the remote database through the small printer.

The above-mentioned embodiments are only preferred embodiments of the present invention, and the ordinary changes and substitutions performed by those skilled in the art within the technical scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A circuit arrangement usable for hearing test, comprising:

a control circuit comprising a processor;

the Bluetooth module is used for receiving audio files from the outside, and the output end of the Bluetooth module is connected to the control circuit;

the digital-to-analog conversion circuit is used for converting the audio file output by the control circuit into an analog signal, and the digital-to-analog conversion circuit is connected to the output end of the control circuit;

the input end of the digital-to-analog conversion circuit is connected to the output end of the digital-to-analog conversion circuit;

and the input end of the noise reduction circuit is connected to the output end of the volume control circuit.

2. The circuit arrangement which can be used for hearing tests according to claim 1, characterized in that it comprises:

and the input end of the audio amplification circuit is connected to the output end of the noise reduction circuit.

3. The circuit arrangement which can be used for hearing tests according to claim 2, characterized in that it comprises:

an earphone connected to the audio amplification circuit.

4. The circuit arrangement which can be used for hearing tests according to claim 3, characterized by comprising:

the earphone is an earmuff type earphone, and a battery for supplying power to the circuit device is arranged in the earphone.

5. The circuit arrangement which can be used for hearing tests according to claim 1, characterized in that it comprises:

an LED light connected to the control circuit and capable of illuminating when the Bluetooth module is transmitting data.

6. The circuit arrangement that can be used for hearing tests according to claim 1,

the processor is a chip STM32F105RCT6, the digital-to-analog conversion circuit comprises a chip CS4334, the volume control circuit comprises a chip PGA2311, and the noise reduction circuit comprises a chip AS 3415.

7. The circuit arrangement that can be used for hearing tests according to claim 2,

the audio amplifying circuit comprises a chip LM 4991.