CN103584859A - Electroglottography device - Google Patents
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Abstract
The invention discloses an electroglottography device. The electroglottography device comprises a signal controller, an audio collector and an electroglottography collector, wherein the signal controller is used for adjusting audio signals and electroglottography signals; the audio collector is connected with the signal controller and used for collecting the audio signals; the electroglottography collector is connected with the signal controller and used for collecting the electroglottography signals; the audio collector and the electroglottography collector respectively transmit the collected audio signals and the collected electroglottography signals to the signal controller; the signal controller adjusts the amplitude of the audio signals and the electroglottography signals. The electroglottography device is concise in structure; by means of high-frequency low voltage, achieves more accurate signal collection; can be matched with other equipment to achieve good systemized detection and evaluation of speech and noise diseases; has the advantages of high detection precision and wide application range.
Description
Technical Field
The invention belongs to the field of medical instruments, and particularly relates to an electroglottography instrument.
Background
In 1957, Fabra applied electronic glottal chart for the first time to examine throat can be regarded as that throat examination transits from qualitative stage to quantitative stage, and is widely used for research of physiological and pathological vibration. The electroglottis apparatus is an electroglottis image signal obtained by electrifying a glottis image electrode through a glottis image electrode attached to the skin of the thyroid cartilage plate of the larynx and due to the current change caused by the impedance change between the two side vocal cords when the larynx moves. The requirement of the instrument on precision is very high, and the control on current and voltage needs to be ensured in a safety range. Meanwhile, a large number of signals such as the fundamental frequency of vocal cord vibration, the closing rate, the perturbation, the abduction degree of the vocal cords and the height change of the throat position and the like can be fed back through the electroglottography signal. The electric glottic graphic instrument is mainly used for scientific research and clinical research abroad, the potential of the electric glottic instrument is not excavated, more improvements can be made on the aspects of convenient use, signal reliability and signal precision, and related real-time data processing tools and application courses are lacked.
In the field of otolaryngological medicine, relevant instruments for evaluating and monitoring speech diseases, voice diseases and throat diseases are lacked, and a proper electroglottic chart instrument is lacked in application practice, so that the instrument cannot be combined with actual clinical evaluation and rehabilitation therapy.
Disclosure of Invention
The invention overcomes the defects of the electroglottography instrument in the prior art and provides the electroglography instrument. The electro-acoustic glottis pattern instrument has a simple structure, breaks through the traditional low-frequency voltage limitation, adopts high-frequency weak voltage, and is more accurate in signal acquisition. Meanwhile, the system can be matched with other equipment (such as computers, software and the like) to realize systematic detection and evaluation of speech and voice diseases and physical symptoms, and has the characteristics of high precision and wide application in clinic and scientific research.
The invention provides an electroglottography instrument, comprising:
a signal controller for adjusting the audio signal and the electroglottography signal;
the audio collector is connected with the signal controller and is used for collecting the audio signal;
the electroglottis chart collector is connected with the signal controller and is used for collecting the electroglottis chart signals;
the audio collector transmits the collected audio signals to the signal controller; the electroglottography collector transmits the collected electroglottography signals to the signal controller; the signal controller amplifies and low-pass filters the amplitude and frequency of the audio signal and the electroglottography signal.
In the invention, the signal controller comprises a shell, and an audio signal filtering and amplifying module, a high-frequency oscillation module, an electroglottography filtering and amplifying module, an output control module and a monitoring module which are arranged in the shell; wherein,
and the audio signal filtering and amplifying module is connected with the audio collector and is used for amplifying and low-pass filtering the audio signal collected by the audio collector.
And the high-frequency oscillation module is connected with the electroacoustic glottis image collector and sends a high-frequency oscillation signal to the electroacoustic glottis image collector.
And the electroglottis filtering and amplifying module is connected with the electroglottis collector and is used for amplifying and low-pass filtering the electroglottis signals collected by the electroglottis collector.
The output control module is connected with the audio signal filtering and amplifying module and is used for outputting the audio signal; the filter amplifier is connected with the electro-glottal graph filter amplification module and is used for outputting the electro-glottal graph signals.
The monitoring module is connected with the audio signal filtering and amplifying module and is used for detecting the strength of the audio signal; the electro-glottal graph filtering and amplifying module is connected with the electro-glottal graph filtering and amplifying module and is used for detecting the strength of the electro-glottal graph signals.
In the invention, the frequency of the high-frequency oscillation signal output by the high-frequency oscillation module is 2.5 +/-0.2 MHz.
In the invention, the audio collector is a microphone; the microphones are a single-direction low-impedance electric microphone and a single-direction capacitor microphone.
In the invention, the electroglottis collector comprises an electroglottis electrode which is connected with the signal controller through an electrode cable and is used for collecting electroglottis signals.
The electroglottic electrodes include a first electroglottic electrode, a second electroglottic electrode.
The diameter of the electroglottis graph electrode is 25mm for children and 32mm for adults, the frequency response is 70 Hz-500 Hz, and the gain is 0-minus 3dB in the frequency response range.
In the invention, the electroglottis pattern collector further comprises an electrode neck strap which is fixedly connected with the electroglottis pattern electrode and is used for fixing the electroglottis pattern electrode, wherein the electroglottis pattern collector comprises a first electroglottis pattern electrode and a second electroglottis pattern electrode.
In the present invention, the signal controller further comprises an isolation input module; the isolation input module is arranged between the electroglottis collector and the electroglottis filtering and amplifying module and used for improving the signal-to-noise ratio of electroglottis signals collected by the electroglottis collector.
In the invention, the signal controller further comprises an isolation output module; the isolation output module is arranged between the electroacoustic glottal collector and the high-frequency oscillation module and used for improving the common-mode interference resistance of the high-frequency oscillation signal.
The invention further comprises a signal processor which is connected with the signal controller and is used for processing the audio signal and/or the electroglottography signal output by the signal controller.
The traditional electroglottography instrument in the prior art adopts low-frequency voltage, the state of a slight throat (such as the change of the upper and lower edges of a vocal cord and the change of a vocal cord viscous mode wave) cannot be detected in time, and even relevant signal data cannot be obtained. The invention uses high-frequency weak voltage (high-frequency carrier voltage), can detect the slight change of the larynx very sensitively, can detect the larynx of the crowd of all ages, and has considerable advantages.
The method does not interfere normal sounding, is simple to operate, and can identify whether the source causing speech or voice disorder is a sounding system or other functional areas. The invention can be matched with related equipment, such as a computer, an oscilloscope and the like, to evaluate the breathing mode, the expiration support, the breathing and sounding coordination, the starting mode, the sounding fundamental frequency, the sounding intensity, the sounding tone quality and the resonance function of the oral cavity and the nasal cavity focus, and has wide application prospect in clinic and scientific research. The invention is connected with other external equipment and used together with software, and can realize complete analysis of signals.
The invention provides an objective detection device and a detection method, which are special high-precision devices capable of acquiring audio signals (namely sound waves) through a microphone and analyzing the audio signals by an acoustic method and acquiring electroglottic signals (namely electroglottic images) through a glottic electrode and analyzing the electroglottic signals by an electrophysiological method. The invention uses the glottis electrode to directly collect the impedance change caused between the two side vocal cords when the user moves in the throat, thereby realizing effective and accurate detection. The invention can be widely applied to a plurality of fields, such as scientific research, medical detection, rehabilitation treatment examination and detection, and can effectively obtain the state of illness and rehabilitation condition of the patient, for example, the invention is used for children patients who are not suitable for making laryngoscopes. The invention has simple operation and can be used only by wearing the equipment and turning on the power supply. The invention fills the gap of the electroglottic instrument at home and abroad.
Drawings
Fig. 1 is a schematic structural view of the electroglottic chart apparatus of the present invention.
Fig. 2 is a schematic structural diagram of an electroglottography instrument of the present invention.
Fig. 3 is a schematic diagram of an electroacoustic glottal image collector.
Fig. 4 is a schematic view of the structure and the using state of the electroacoustic glottis apparatus of the invention.
Fig. 5 is a schematic diagram of the internal operating circuit of the electroglottography device of the present invention.
Fig. 6 is a schematic diagram of a working circuit of the electroacoustic glottal collector.
Detailed Description
The present invention is further described in detail below with reference to the drawings and examples, but the scope of the present invention should not be limited thereto.
As shown in fig. 1-6, 1-signal controller, 2-audio collector, 3-electroglottography collector, 4-signal processor, 11-audio signal filtering and amplifying module, 12-high frequency oscillation module, 13-electroglottography filtering and amplifying module, 14-output control module, 15-monitoring module, 16-shell, 17-isolation input module, 18-isolation output module, 31-first electroglography electrode, 32-second electroglography electrode, 33-electrode cable, 34-electrode neck band, 51-power switch, 52-power indicator lamp, 53-audio signal input gain switch, 54-input signal selection switch, 55-electroglography signal input amplification gain switch, 56-audio signal input port, 57-electroglottography signal input port, 58-LED level indication signal lamp, 59-signal output port, 50-signal output port.
As shown in fig. 1 and 2, the electroglottography device of the present invention includes a signal controller 1, an audio collector 2, and an electroglography collector 3. The audio collector 2 and the electroglottography collector 3 are respectively connected with the signal controller 1. The audio collector 2 transmits the collected audio signals to the signal controller 1, and the electroglottis collector 2 transmits the collected electroglottis signals to the signal controller 1. The signal controller 1 adjusts the amplitude of the audio signal and the electroglottography signal. In the present invention, "audio signal" means a microphone input signal. "electroglottography signal" refers to an electroglottography electrode input signal.
The signal controller 1 includes: the device comprises a shell 16, and an audio signal filtering and amplifying module 11, a high-frequency oscillation module 12, an electroglottography filtering and amplifying module 13, an output control module 14 and a monitoring module 15 which are arranged in the shell 16.
One end of the audio signal filtering and amplifying module 11 is connected with the audio collector 2, one end is connected with the output control module 14, and the other end is connected with the monitoring module 15. The audio signal filtering and amplifying module 11 performs low-pass filtering and amplifying on the audio signal acquired by the audio acquisition device 2, and transmits the amplified audio signal to the output control module 14. The monitoring module 15 monitors the strength of the output signal of the audio signal filtering and amplifying module 11 in real time.
The high-frequency oscillation module 12 is connected with the electroglottography collector 3, is powered by a power supply, generates oscillation level and provides a high-frequency oscillation signal for the electroglography wave collector 3.
As shown in fig. 6, the high-frequency oscillation module 12 includes an LC resonance circuit, a stabilization amplifier circuit, and a noise elimination circuit. The transistors Q9, Q10, and Q11 are connected as a main body to constitute an electrical disturbance amplifying circuit, and the output terminal is connected to the LC resonance circuit. The LC resonant circuit is composed of a capacitor C27 and an inductor L10, and can select a high frequency band. The output of the LC resonant circuit is connected to a stabilizing amplifier circuit (Q7, Q8) which can stabilize the oscillation level and amplify it, and the output is connected to the isolated output module 18. C23, C24, C26, C28, C30, C31, and C33 play a role of eliminating noise, and function to prevent the high frequency signal from shunting to the power supply, and also to suppress the power supply signal from entering the high frequency circuit, thereby further reducing noise.
One end of the electroglottography filtering amplification module 13 is connected with the electroglottography collector 3, one end is connected with the output control module 14, and the other end is connected with the monitoring module 15. The electroglottis filtering and amplifying module 13 filters and amplifies the electroglottis signals collected by the electroglottis collector 3, and transmits the amplified electroglottis signals to the output control module 14. The monitoring module 15 monitors the intensity of the output signal of the electroglottis filtering and amplifying module 13 in real time.
One end of the output control module 14 is connected to the audio signal filtering and amplifying module 11, and receives the audio signal output by the audio signal filtering and amplifying module 11. One end of the output control module 14 is connected to the electroglottography filtering and amplifying module 13, and receives the electroglography signal output by the electroglography filtering and amplifying module 13. The other end of the output control module 14 may also be connected to the signal processor 4, and the output control module 14 transmits the audio signal and/or the electroglottography signal received by the output control module to the signal processor 4.
And the signal processor 4 is connected with the signal controller 1 and is used for processing the audio signal and/or the electroglottography signal output by the signal controller 1.
As shown in fig. 2, the signal controller 1 further includes an isolation input module 17. As shown in fig. 2 and fig. 6, the isolation input module 17 is disposed between the electroglottography wave collector 3 and the electroglography filtering amplification module 13, and is configured to improve a signal-to-noise ratio of the audio signal collected by the electroglography wave collector 3. The isolation input isolates signals collected from the other electroglottic electrode and transmits the signals to the electroglottic filtering and amplifying module 13. Namely, the isolation input module 17 and the electroglottography filtering and amplifying module 13 are used for inputting, isolating and amplifying signals collected by the other electrode except the electrode outputting the high-frequency weak voltage, and transmitting the signals to the control output module 14.
As shown in fig. 2, the signal controller 1 further includes an isolation output module 18. As shown in fig. 2 and 6, the isolation output module 18 is disposed between the electroglottography collector 3 and the high-frequency oscillation module 12, and the isolation output isolates the level generated by the high-frequency oscillation and applies the isolated level to the electroglography electrode for improving the common-mode interference resistance of the high-frequency oscillation signal.
The isolation input and the isolation output adopt isolation transformers, and primary and secondary coils of the isolation transformers are isolated by shielding layers, so that distributed capacitance of the isolation transformers is reduced, and common-mode interference resistance is improved.
The audio collector 2 includes a microphone type using a single directional low impedance motorized type. It may also be a single-directional condenser microphone. The audio collector 2 collects the sound signals of the patient in the sounding process and sends the collected audio signals to the audio signal filtering and amplifying module 11 of the signal controller 1, and the frequency response of the audio signal filtering and amplifying module is 0.5-2.5 dB within the frequency range of 70 Hz-500 Hz. Preferably, a single directional low impedance power microphone is used, with the input being a 6.3mm plug or a 3.5mm mini plug (a 3.5mm → 6.35mm patch plug may be used).
As shown in fig. 1 to 4, the electroglottis collector 3 is connected to the signal controller 1, and the electroglottis collector 3 includes electroglottis electrodes and electrode cables 33 connected to the electroglottis electrodes for collecting electroglottis signals. The electroglottic electrodes comprise a first electroglottic electrode 31, a second electroglottic electrode 32. The first and second electroglottic electrodes 31, 32 are connected to the signal controller 1 by electrode cables 33, the first and second electroglottic electrodes 31, 32 being used to acquire electroglottic signals.
The electrode cable 33 has one end connected to the first electroglottic electrode 31, one end connected to the second electroglottic electrode 32, and the other end connectable to the signal controller 1. Preferably, one end of the electrode cable 33 is provided with an electrode plug (not shown) which can be conveniently inserted into a corresponding socket on the panel of the housing 16 of the signal controller 1, for example, the electroglottography signal input port 57.
The glottic image collector 3 further comprises an electrode neck strap 34. The electrode neck strap 34 is used to secure the first 31 and second 32 electroglottic electrodes. The electrode neck strap 34 can fix the electroglottis electrode 31 and the electroglottis electrode 32 on the neck of the patient, and are respectively placed between the bilateral vocal cords of the throat of the patient. The first electroglottic electrode 31 and the second electroglottic electrode 32 transmit the collected electroglottic signals to the electroglottic filtering and amplifying module 13 in the signal controller 1 through the electrode cable 33.
Example 1: setting up an electroacoustic glottis chart instrument
As shown in fig. 1, the electroglottography instrument of the invention comprises a signal controller 1, an audio collector 2 and an electroglography collector 3. The audio collector 2 adopts a microphone. Before the electroglottography instrument is used, whether the power supply is normal or not should be checked. Preferably, the invention uses battery power, for example, 6 batteries with 1.5V (R20) size, the voltage is DC9V, the current is less than 40mA, and when the power voltage is too low, the LED indicator lamp of the green power supply flickers. The power supply supplies power to all parts of the system after rectification, filtering and voltage stabilization. Then, the microphone 2, the electroglottography wave collector 3, and the signal processor 4 (as a device for subsequently processing data) are connected to the signal controller 1. The microphone 2 is connected with the audio signal filtering and amplifying module 11, the electroglottography collector 3 is connected with the electroglography filtering and amplifying module 13, and the signal processor 4 is connected with the output control module 14.
As shown in fig. 1 and 3, the signal controller 1 includes a housing 16. The case back cover of the housing 16 includes a battery cover plate and a battery cover plate screw. The panel of the shell 16 is provided with a power switch 51, a power indicator lamp 52, an audio signal input gain switch 53, an input signal selection switch 54, an electroacoustic glottis signal input amplification gain switch 55, an audio signal input port 56, an electroacoustic glottis signal input port 57, an LED level indicator signal lamp 58, a signal output port 59 and a signal output port 50.
Example 2: signal acquisition and monitoring
And turning on a power supply, setting the electro-glottic instrument respectively according to different types and requirements of input signals before the electro-glottic instrument is in a working state and receives audio signals or electro-glottic signals, and adjusting an input signal selection switch 54 on the panel of the shell 16, wherein the input signal selection switch comprises three stages of 'Mic', 'EGG' and 'Mic EGG'. For example, if the input signal is an audio signal collected by the Microphone 2, the input signal selection switch 54 is turned to the Microphone "Mic" (Mic: Microphone or Microphone) stage. If the input signal is the electroglottic signal collected by the electroglottic wave collector 3, the input signal selection switch 54 is turned to the electroglottic "EGG" (EGG) file. If the input signal includes both the input audio signal and the electroglottis signal, the input signal selection switch 54 is adjusted to the microphone and electroglottis "Mic EGG" stages.
An audio signal input port 56 on the face of housing 16 is provided for connection to a recording device such as microphone 2. An electroglottic instrument electroglottic signal input port 57 on the face of the housing 16 for connection to the electroglottic wave collector 3.
As shown in fig. 3, it is preferable to input the amplification gain switch 53 by adjusting the audio signal on the panel of the housing 16, including five steps of 10dB, 20dB, 30dB, 40dB, and 50dB, according to the input requirement of the audio signal (sound), so as to adjust the amplification gain after the sound is input. The amplification gain of the audio signal filtering and amplifying module 11 can be adjusted to 10dB, 20dB, 30dB, 40dB and 50dB five gradually increased gears (each gear error is +/-2 dB) to amplify and select the input audio signal.
As shown in fig. 3, the input amplification gain of the electroacoustic glottis signal is preferably adjusted by adjusting the electroacoustic glottis signal input amplification gain switch 55 on the panel of the housing 16, which includes three stages of Low (-6dB), Mid (0dB), and High (6 dB). The amplification gain switch of the electroglottis filtering amplification module 13 can be adjusted to the amplification selection of Low (gain-6 dB (+ -1 dB)), Mid (gain 0dB), and High (gain +6dB (+ -1 dB)) increasing gradually, and each gear is spaced by 6 dB.
Preferably, the first and second electroglottic electrodes 31, 32 used to acquire the electroglottic signals are gold-plated electrodes. Preferably, the diameter of the electrode is 25/32 mm; the length of the electrode cable is 1.2-1.4 m; the carrier frequency of the electrode is 2.5 +/-0.2 MHz, and the gain of frequency response in the frequency range of 70Hz to 500Hz is 0 to-3 dB. The material, size and area, length, frequency, etc. of the electrode may be any suitable ones for the present invention, and are not limited.
The signal acquisition is started. When an audio signal or an electroglottography signal is input, the monitoring module 15 displays the intensity of the current signal through the LED level indicating signal lamp 58. In this embodiment, the monitoring module 15 includes a TL064CN chip and two LM3915 chips as core devices. The TL064CN chip has the characteristics of high input impedance, wide bandwidth, drift current, small input bias current and the like. The input end of the TL064CN is respectively connected with the audio signal filtering and amplifying module 11 and the electroglottography filtering and amplifying module 13, and the output end is connected with the input end of the LM3915 chip. TL064CN may adjust the signal to the appropriate input level for LM 3915.
The LM3915 is an integrated circuit chip, which can drive/control at least one LED, LCD or fluorescent display screen by inputting a level value, and can realize control in units of dots or control in units of rows, for example, ten LEDs, according to different use requirements. Each drive interface of LM3915 is connected to an LED lamp. The two LM3915 chips respectively and correspondingly control two rows of single-row LED lamps, wherein one row of LED lamps indicates sound signals, and the other row of LED lamps indicates electroglottic signals. The LED level indicating signal lamp 58 can display the intensity of the sound signal/electroglottography signal when an audio signal or electroglography signal is input. When the signal is stronger, the corresponding single-row LED lamp is more lightened. When the signal is strongest, all the indicating signal lamps are on. On the contrary, when no signal is input, the LED level indicator lamp is completely turned off.
The signal output ports 59, 50 may output signals that are coupled to external device inputs, such as to the signal processor 4.
Example 3: filtering and amplification of audio signals
In this embodiment, when a sound signal is input, since the audio signal directly input by the microphone 2 has noise and low volume, the audio signal needs to be preprocessed in the filter amplifier, that is, filtered and amplified by the audio signal filter amplifier module 11. Preferably, the audio signal filtering and amplifying module 11 includes an operational amplifier, a feedback resistor and a control switch. The feedback resistor and the control switch are connected to form a feedback impedance of the operational amplifier, and two ends of the feedback impedance are respectively connected with the feedback end and the output end of the operational amplifier to form a feedback loop. Preferably, the operational amplifier is an NE5534N operational amplifier chip, and the operational amplifier is a low-noise operational amplifier with a bandwidth of 10 MHz. When the control switch is changed, the impedance of the feedback loop is changed, and the gain amplification factor of the whole operational amplifier is further changed. Preferably, the control switch is provided with 5 steps, corresponding to 5 different resistances. The filtered and amplified audio signal is output through the output control module 14; and may also be transmitted to the signal processor 4 through the output control module 14.
Example 4: filtering and amplification of an electroacoustic glottal signal
In this embodiment, the electroglottography collector 3 collects electroglottography signals, and further, unnecessary parts of the collected electroglography signals need to be removed by filtering and amplification. Preferably, the filter module in the electroglottography filtering and amplifying module 13 mainly comprises two op07 operational amplifiers, the operational amplifiers have low noise, and the input electroglography signals can be effectively filtered by matching with other resistors and semiconductor devices. The amplification gain module in the electric glottal graph filtering and amplifying module 13 is implemented by two HA17741 operational amplifiers, a feedback resistor and a control switch. The HA17741 HAs high voltage gain characteristic, the feedback resistor and the control switch are connected to form the feedback impedance of the operational amplifier, and both ends of the feedback impedance are connected to the feedback end of the operational amplifier and the output end of the operational amplifier, respectively, so as to form the feedback loop of the operational amplifier. When the control switch is changed, the impedance of the feedback loop on the operational amplifier can be changed, and the gain amplification factor of the whole operational amplifier is further changed. After the electric glottal graph signal passes through the operational amplifier, an ideal amplification effect can be obtained, and the electric glottal graph signal is output by the output control module 14; and may also be transmitted to the signal processor 4 through the output control module 14.
Example 5: signal output control
As shown in fig. 5, the output control module 14 is used for outputting a control signal, and the function of the output control module can be realized by controlling a switch. As shown in fig. 5, preferably, the control switch is composed of two switches in linkage, one end of the first switch K1 is connected to the audio signal filtering and amplifying module 11, and the other end is connected to the signal output port 59 of the electroglottography device; one end of the second switch K2 is connected to the electroglottography filtering and amplifying module 13, and the other end is connected to the signal output port 50 of the electroglography device, and the signal output port is connected to the signal processor 4.
The input signal selection switch 54 is switched. When only the sound signal is output, K1 is closed, K2 is opened, and the audio signal is output to the signal processor 4; when only the electroglottis signal is output, K1 is opened, K2 is closed, and the electroglottis signal is output to the signal processor 4; when the audio signal and the electroglottography signal are simultaneously output, both K1 and K2 are closed, and the audio signal and the electroglography signal are simultaneously output to the signal processor 4.
With one of the embodiments of the electroacoustic glottis apparatus of the present invention, the audio collector 2 and the electroacoustic glottis collector 3 may be used to simultaneously collect the audio signal and the electroacoustic glottis signal of the user, as shown in fig. 4. Before use, the microphone 2 and the electroglottis collector 3 are connected to the electroglottis instrument. The microphone 2 is close to the mouth of the user, the electroglottis collector 3 is fixed on the neck of the patient by an electrode neck strap 34, and electroglottis electrodes 32 are respectively arranged between bilateral sound straps of the throat of the patient. After the power source is successfully debugged, the glottal instrument is turned on, and then the input signal selection switch 54 on the panel of the shell 16 is adjusted to the 'Mic EGG' gear. When a user vocalizes, the microphone 2 collects an audio signal of the user's voice, and the electroglottography collector 3 collects an electroglography signal. The microphone 2 and the electroglottography collector 3 respectively transmit the electroglottography signal of the audio signal to the signal controller 1. The signal controller 1 processes the audio signal through the audio signal filtering and amplifying module 11, filters noise signals in the audio signal, improves the signal-to-noise ratio of the audio signal, reduces the influence of noise on a sounding signal of a user, amplifies the power of the filtered audio signal, and then sends the processed audio signal to the output control module 14 through the audio signal filtering and amplifying module 11. Similarly, the electroglottography signal is sequentially filtered and amplified by the isolating input module 17 and the electroglography filtering and amplifying module 13, and the electroglography filtering and amplifying module 13 sends the processed electroglography signal to the output control module 14. The monitoring module 15 monitors the signal intensity output by the audio signal filtering and amplifying module 11 and the electroglottis filtering and amplifying module 13 in real time, and displays the signal intensity in real time through the LED level indicator lamp. The output control module 14 sends the received audio signal and the electroacoustic glottal signal to the signal processor 4 connected with the output control module for subsequent processing.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. An electroglottography device, comprising:
a signal controller (1) for adjusting the audio signal and the electroglottography signal;
the audio collector (2) is connected with the signal controller (1) and is used for collecting the audio signal;
the electroglottis chart collector (3) is connected with the signal controller (1) and collects the electroglottis chart signals by adopting high-frequency weak voltage;
wherein the audio collector (2) transmits the collected audio signals to the signal controller (1); the electroglottis chart collector (3) transmits the collected electroglottis chart signals to the signal controller (1); the signal controller (1) amplifies and low-pass filters the amplitude and frequency of the audio signal and the electroglottography signal.
2. The electro-glottic instrument as claimed in claim 1, characterized in that the signal controller (1) comprises a housing (16), and an audio signal filtering and amplifying module (11), a high-frequency oscillation module (12), an electro-glottic filtering and amplifying module (13), an output control module (14) and a monitoring module (15) which are arranged in the housing (16); wherein,
and the audio signal filtering and amplifying module (11) is connected with the audio collector (2) and is used for amplifying and low-pass filtering the audio signal collected by the audio collector (2).
And the high-frequency oscillation module (12) is connected with the electroacoustic glottis diagram collector (3) and sends a high-frequency oscillation signal to the electroacoustic glottis diagram collector (3).
And the electric glottal graph filtering and amplifying module (13) is connected with the electric glottal graph collector (3) and is used for amplifying and low-pass filtering the electric glottal graph signals collected by the electric glottal graph collector (3).
The output control module (14) is connected with the audio signal filtering and amplifying module (11) and the electroglottography filtering and amplifying module (13) and is used for outputting the audio signal and the electroglottography signal;
the monitoring module (15) is connected with the audio signal filtering and amplifying module (11) and the electroglottic image filtering and amplifying module (13) and is used for detecting the intensity of the audio signal and/or the electroglottic image signal.
3. The glottal graph as claimed in claim 2, characterized in that the high-frequency oscillation signal of the output of the high-frequency oscillation module (12) has a frequency of 2.5 ± 0.2 MHz.
4. The electro-glottal instrument according to claim 1, characterized in that the audio collector (2) is a microphone; the microphones are a single-direction low-impedance electric microphone and a single-direction capacitor microphone.
5. The electro-glottic apparatus of claim 1, characterized in that the electro-glottic image collector (3) comprises electro-glottic image electrodes (31, 32); the electroglottic electrodes (31, 32) are connected to the signal controller (1) by electrode cables (33) for acquiring electroglottic signals.
6. The electroglottic apparatus of claim 4, wherein the diameter of the electroglottic electrodes (31, 32) is 25/33mm, the frequency response of the electroglottic filtering and amplifying block is 70 Hz-500 Hz, and the gain is 0-3 dB in the frequency response range.
7. The electro-glottic apparatus of claim 4, wherein the electro-glottic collector (3) further comprises an electrode neck strap (34); the electrode neck strap (34) is fixedly connected with the electroglottis electrode (31, 32).
8. The electro-glottic apparatus of claims 1-7, wherein the signal controller (1) further comprises an isolated input module (17); the isolation input module (17) is arranged between the electroglottis chart collector (3) and the electroglottis chart filtering and amplifying module (13) and is used for improving the signal-to-noise ratio of the audio signal collected by the electroglottis chart collector (3).
9. The electro-glottic apparatus of claims 1-7, wherein the signal controller (1) further comprises an isolated output module (18); the isolation output module (18) is arranged between the electroacoustic glottal image collector (3) and the high-frequency oscillation module (12) and used for improving the common-mode interference resistance of the high-frequency oscillation signals.
10. The electroglottic apparatus of claim 1, further comprising a signal processor (4), said signal processor (4) being connected to said signal controller (1) for processing the audio signal and/or electroglottic signal output by said signal controller (1).
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