CN112641535B - Fundamental frequency variable sounding method and self-adaptive variable fundamental frequency type electronic artificial larynx - Google Patents
Fundamental frequency variable sounding method and self-adaptive variable fundamental frequency type electronic artificial larynx Download PDFInfo
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/20—Epiglottis; Larynxes; Tracheae combined with larynxes or for use therewith
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/20—Epiglottis; Larynxes; Tracheae combined with larynxes or for use therewith
- A61F2002/206—Speech aids with external actuators, e.g. electrical larynxes
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Abstract
The invention discloses a fundamental frequency variable sounding method and a self-adaptive variable fundamental frequency electronic artificial larynx, which comprises the following steps: firstly, collecting and analyzing physiological signals of a user to obtain speech speed information in the physiological signals; generating a basic sinusoidal signal and a speech speed related sinusoidal signal according to speech speed information of the speech; then, frequency modulation is carried out on the basic sinusoidal signal and the speech speed related sinusoidal signal, so as to obtain a driving signal; and finally, driving the micro electric-to-electric conversion system to work after amplifying the driving signal to generate voice with variable fundamental frequency. The invention can collect physiological signals of a patient and analyze the physiological signals to obtain the pronunciation speed of the patient, and then adjusts the sounding fundamental frequency of the electronic artificial larynx according to the pronunciation speed, so that the fundamental frequency of the voice is changed and the electronic artificial larynx voice with tone information is formed, and the adjustment and control difficulty of the fundamental frequency and the learning difficulty of the patient are effectively reduced.
Description
Technical Field
The invention relates to an electronic artificial larynx, in particular to a fundamental frequency variable sounding method and a self-adaptive variable fundamental frequency electronic artificial larynx.
Background
Many people have to accept a laryngectomy due to diseases, trauma, etc., resulting in the removal of the throat of the postoperative patient, the damage or loss of vocal cords, and loss of sound production. At present, speech rehabilitation means for patients with laryngectomy are divided into three types of esophageal voice, esophageal-tracheal voice and electronic artificial larynx voice. Wherein, the esophageal voice is difficult to learn, the pronunciation is short and discontinuous, and the loudness is lower; the voice of the esophagus-trachea requires secondary operation, which is expensive and difficult to maintain, and both are difficult to accept by patients. Compared with the former two, the electronic artificial larynx voice has the advantages of consistent pronunciation, flood and bright sound, simple learning and the like, and is the most popular speech sound type Kang Fufu at present.
However, the existing electronic artificial larynx voice still has the defects of single fundamental frequency, voice machinery, large radiation noise and the like, and particularly for patients taking Chinese as a mother language, the electronic artificial larynx can not send out voice with Chinese tone, so that the correct expression thought of the patient through the electronic artificial larynx voice is greatly hindered, and the application of the electronic artificial larynx is limited. Although with the research of electronic artificial larynx, there are a great deal of researches to propose to use physiological signals such as finger pressure, surface myoelectricity, air current air pressure, etc. to adjust the fundamental frequency of sound production of electronic artificial larynx, so that the voice has tone change, and the method of sound production has the defects of complicated fundamental frequency regulation, difficult learning, etc., which limits the practical application. Therefore, the existing electronic artificial throat has the problems of single fundamental frequency of voice and complex fundamental frequency regulation and control.
Disclosure of Invention
The invention aims to provide a fundamental frequency variable sounding method and an adaptive variable fundamental frequency electronic artificial larynx. The voice frequency adjusting device can adjust the voice fundamental frequency of the electronic artificial throat according to the voice of the patient, so that the voice fundamental frequency is changed, and the difficulty in adjusting and controlling the fundamental frequency is reduced.
The technical scheme of the invention is as follows: the fundamental frequency variable sounding method comprises the following steps:
① Collecting and analyzing physiological signals of a user to obtain speech rate information in the physiological signals;
② Generating a basic sinusoidal signal and a speech speed related sinusoidal signal according to speech speed information of the speech;
③ Frequency modulation is carried out on the basic sinusoidal signal and the speech speed related sinusoidal signal, so as to obtain a driving signal;
④ The driving signal is amplified and then drives the micro electro-mechanical conversion system to work, so as to generate voice with variable fundamental frequency.
In the above-mentioned fundamental frequency variable sounding method, the physiological signal in step ① includes a voice signal of the user, and the interval between the front and rear voices in the voice signal is calculated by a voice segmentation algorithm to form voice speed information.
In the aforementioned fundamental frequency variable sounding method, the physiological signal in step ① includes surface electromyographic signals of two cheek muscles of the user, and the speech rate information is formed by extracting average peak intervals of the surface electromyographic signals.
In the above-mentioned fundamental frequency variable sounding method, the frequency of the speech speed related sinusoidal signal in step ② is 0.5 times of the speech speed, and the frequency of the basic sinusoidal signal is 60-80 Hz.
In the above-mentioned fundamental frequency variable sounding method, the frequency modulation method in step ③ is specifically to multiply the frequency of the basic sinusoidal signal with the speech speed related sinusoidal signal to generate the driving signal.
The self-adaptive variable fundamental frequency electronic artificial larynx used for realizing the fundamental frequency variable sounding method,
The voice analysis system is used for collecting physiological signals of a user and extracting speech speed information in the physiological signals;
the driving system is used for analyzing the speech speed change in the speech speed information, generating a driving signal, amplifying the driving signal and driving the miniature electric-force conversion system;
And the miniature electric-force conversion system is used for converting the driving signal into mechanical vibration and sending out electronic artificial larynx voice.
The self-adaptive variable fundamental frequency electronic artificial larynx further comprises a power supply module and a control switch.
In the foregoing adaptive variable baseband electronic artificial larynx, the voice analysis system comprises:
the physiological signal acquisition module is used for acquiring physiological signals of a user, converting the acquired analog signals into digital signals and providing the digital signals to the signal processing module;
and the signal processing module is used for extracting the speech speed information in the physiological signal.
In the foregoing adaptive variable baseband electronic artificial larynx, the physiological signal acquisition module includes a microphone and/or an myoelectricity acquisition electrode.
In the foregoing adaptive variable baseband electronic artificial larynx, the driving system comprises:
the singlechip is used for generating a variable speech speed related sinusoidal signal and a basic sinusoidal signal according to the extracted speech speed information;
the fundamental frequency generation module is used for carrying out frequency modulation on the speech speed related sinusoidal signal and the basic sinusoidal signal to synthesize a driving signal;
and the signal amplifying circuit amplifies the power of the driving signal and drives the micro electric-power conversion system to work normally.
Compared with the prior art, the voice speed information is obtained by analyzing the physiological signals of the user, and the voice fundamental frequency sent by the miniature electric-to-electric conversion system is modulated according to the voice speed information, so that the miniature electric-to-electric conversion system can send out voice with the fundamental frequency changed, and the characteristic that the fundamental frequency characteristics indirectly correspond to the tone of the mandarin is utilized, so that the fundamental frequency of the voice is changed to form electronic artificial throat voice with tone information, and the sounding quality and the intelligibility of the electronic artificial throat voice are effectively improved; compared with the existing fundamental frequency adjusting method, the fundamental frequency adjusting method can effectively reduce the adjusting and controlling difficulty of the fundamental frequency and the learning difficulty of a user by utilizing the mode of fundamental frequency modulation by using physiological signals; on the basis, the invention further optimizes the extraction and speech speed information acquisition method of physiological signals and the conversion and fundamental frequency modulation method of speech speed information, so that each control module can be integrated in the electronic artificial larynx, and the convenience and the use effect of the invention are improved. Therefore, the invention can adjust the sounding fundamental frequency of the artificial larynx of the electronic device according to the sounding language of the patient, thereby changing the sounding fundamental frequency and reducing the difficulty of adjusting the fundamental frequency.
Drawings
FIG. 1 is a schematic diagram of the structure of an adaptive variable fundamental electronic artificial larynx;
FIG. 2 is a schematic diagram of a voice analysis system;
FIG. 3 is a schematic diagram of the drive system;
Fig. 4 is an outline view of embodiment 1;
FIG. 5 is a workflow diagram of the present invention;
Fig. 6 is an outline view of embodiment 2.
The marks in the drawings are: the voice signal processing system comprises a 1-voice analysis system, a 2-driving system, a 3-miniature electric-force conversion system, a 4-power module, a 5-control switch, a 6-physiological signal acquisition module, a 7-signal processing module, an 8-singlechip, a 9-fundamental frequency generation module, a 10-signal amplification circuit, 11-electronic artificial throat voice, 12-basic sinusoidal signals, 13-speech speed related sinusoidal signals, 14-driving signals and 15-sounding fundamental frequencies.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not intended to be limiting.
Example 1. The fundamental frequency variable sounding method comprises the following steps:
① Collecting and analyzing physiological signals of a user to obtain speech speed information (namely the number of pronunciations per second of the user) in the physiological signals;
② Generating a basic sinusoidal signal and a speech speed related sinusoidal signal according to speech speed information of the speech;
③ Frequency modulation is carried out on the basic sinusoidal signal and the speech speed related sinusoidal signal, so as to obtain a driving signal;
④ The driving signal is amplified and then drives the micro electro-mechanical conversion system to work, so as to generate voice with variable fundamental frequency.
The physiological signal in step ① includes a voice signal of the user, and the interval between the front and rear voices in the voice signal is calculated by a voice segmentation algorithm to form voice speed information.
The frequency of the speech speed related sinusoidal signal in the step ② is 0.5 times of the speech speed, and the frequency of the basic sinusoidal signal is 60-80 Hz.
The frequency modulation method in step ③ specifically multiplies (amplitude-modulates) the frequency of the base sinusoidal signal and the speech-speed related sinusoidal signal to generate a base frequency signal (i.e. a driving signal) for driving.
The self-adaptive variable fundamental frequency electronic artificial larynx for realizing the fundamental frequency variable sounding method is shown in figure 1 and comprises
The voice analysis system 1 is used for collecting physiological signals of a user and extracting speech speed information in the physiological signals;
The driving system 2 is used for analyzing the speed change in the speed information, generating a changed driving signal, amplifying the driving signal and driving the micro electro-mechanical conversion system;
The miniature electric-force conversion system 3 is used for converting the driving signal into mechanical vibration and sending out electronic artificial larynx voice; the micro electro-mechanical conversion system may be selected from the adjustable micro electro-mechanical conversion parts used in patent 200910090549.3.
The self-adaptive variable fundamental frequency electronic artificial larynx also comprises a power module 4 and a control switch 5, wherein the power module 4 provides power for the whole system, and the control switch 5 controls the switch of the whole system.
The speech analysis system 1, as shown in fig. 2, includes:
the physiological signal acquisition module 6 is used for acquiring physiological signals of a user, converting the acquired analog signals into digital signals and providing the digital signals to the signal processing module;
the signal processing module 7 is used for extracting the speech speed information in the physiological signal.
The physiological signal acquisition module 6 is shown in fig. 4 and comprises a microphone, the driving system 2, the miniature electric-to-force conversion system 3 and the signal processing module 7 are integrated in the electronic artificial larynx, and the microphone is connected with the electronic artificial larynx through a connecting wire.
The driving system 2, as shown in fig. 3, includes:
the singlechip 8 is used for generating a variable speech speed related sinusoidal signal and a basic sinusoidal signal according to the extracted speech speed information;
The fundamental frequency generating module 9 is used for carrying out frequency modulation on the speech speed related sinusoidal signal and the basic sinusoidal signal (namely fundamental frequency control frequency) to synthesize a driving signal;
The signal amplifying circuit 10 amplifies the power of the driving signal and then drives the micro electro-mechanical conversion system to work normally.
The working flow chart of the self-adaptive variable fundamental frequency type electronic artificial larynx is shown in fig. 5, and when the embodiment works, a user presses the control switch 5, the micro electro-force conversion system 3 vibrates, and the user controls the mouth shape to send out the electronic artificial larynx voice 11. Then the microphone receives the electronic artificial throat voice 11 sent by the user, and the voice analysis system 1 analyzes the voice signal to obtain the voice speed information. And then the singlechip 8 generates a basic sinusoidal signal 12 and a speech speed related sinusoidal signal 13 according to the speech speed information. The fundamental frequency generation module 9 then multiplies the fundamental sinusoidal signal 12 with the speech rate related sinusoidal signal 13 to generate a drive signal 14. The driving signal 14 is amplified by the signal amplifying circuit 10 to drive the micro electro-mechanical conversion system to work, so that the user can send out the voice with the base frequency changed, thereby forming the closed-loop self-adaptive base frequency change. The fundamental frequency change rule of the voice is shown as the sounding fundamental frequency 15, when the speed-related sinusoidal signal is 0.5 times of the speed, the duration of each voice sent by the user corresponds to about 0.5 sinusoidal signals, and the fundamental frequency characteristic of the voice can indirectly correspond to four tones of the Mandarin Chinese, so that the sent electronic artificial larynx voice has tone information.
Example 2. The fundamental frequency variable sounding method comprises the following steps:
① Collecting and analyzing physiological signals of a user to obtain speech rate information in the physiological signals;
② Generating a basic sinusoidal signal and a speech speed related sinusoidal signal according to speech speed information of the speech;
③ Frequency modulation is carried out on the basic sinusoidal signal and the speech speed related sinusoidal signal, so as to obtain a driving signal;
④ The driving signal is amplified and then drives the micro electro-mechanical conversion system to work, so as to generate voice with variable fundamental frequency.
The physiological signal in step ① includes the surface electromyographic signals of the user's two cheek muscles (typically the supralingual muscle group), and speech rate information is formed by extracting the average peak interval of the surface electromyographic signals.
The frequency of the speech speed related sinusoidal signal in the step ② is 0.5 times of the speech speed, and the frequency of the basic sinusoidal signal is 60-80 Hz.
The frequency modulation method in step ③ specifically multiplies the frequency of the basic sinusoidal signal and the speech speed related sinusoidal signal to generate a fundamental frequency signal (i.e. a driving signal) for driving.
The self-adaptive variable fundamental frequency electronic artificial larynx for realizing the fundamental frequency variable sounding method is shown in figure 1 and comprises
The voice analysis system 1 is used for collecting physiological signals of a user and extracting speech speed information in the physiological signals;
The driving system 2 is used for analyzing the speed change in the speed information, generating a changed driving signal, amplifying the driving signal and driving the micro electro-mechanical conversion system;
The miniature electric-force conversion system 3 is used for converting the driving signal into mechanical vibration and sending out electronic artificial larynx voice; the micro electro-mechanical conversion system may be selected from the adjustable micro electro-mechanical conversion parts used in patent 200910090549.3.
The self-adaptive variable fundamental frequency electronic artificial larynx also comprises a power module 4 and a control switch 5, wherein the power module 4 provides power for the whole system, and the control switch 5 controls the switch of the whole system.
The speech analysis system 1, as shown in fig. 2, includes:
the physiological signal acquisition module 6 is used for acquiring physiological signals of a user, converting the acquired analog signals into digital signals and providing the digital signals to the signal processing module;
the signal processing module 7 is used for extracting the speech speed information in the physiological signal.
The physiological signal acquisition module 6 is shown in fig. 6, and comprises myoelectricity acquisition electrodes, wherein the driving system 2, the miniature electricity-force conversion system 3 and the signal processing module 7 are integrated in the electronic artificial larynx, and the myoelectricity acquisition electrodes are connected with the electronic artificial larynx through connecting wires.
The driving system 2, as shown in fig. 3, includes:
the singlechip 8 is used for generating a variable speech speed related sinusoidal signal and a basic sinusoidal signal according to the extracted speech speed information;
the fundamental frequency generation module 9 is used for carrying out frequency modulation on the speech speed related sinusoidal signal and the basic sinusoidal signal to synthesize a driving signal;
The signal amplifying circuit 10 amplifies the power of the driving signal and then drives the micro electro-mechanical conversion system to work normally.
The difference with embodiment 1 is that the present embodiment uses myoelectricity collecting electrode to obtain the surface myoelectricity signal of the user and analyzes to obtain the speech speed information, so that the present invention can form two kinds of self-adaptive variable base frequency electronic artificial throats with different structures and realize the base frequency variable sounding method with the same function.
Claims (8)
1. The fundamental frequency variable sounding method is characterized by comprising the following steps of:
① Collecting and analyzing physiological signals of a user to obtain speech rate information in the physiological signals;
② Generating a basic sinusoidal signal and a speech speed related sinusoidal signal according to speech speed information of the speech;
③ Frequency modulation is carried out on the basic sinusoidal signal and the speech speed related sinusoidal signal, so as to obtain a driving signal;
④ Driving the micro electro-mechanical conversion system to work after amplifying the driving signal to generate voice with variable fundamental frequency;
The frequency of the speech speed related sinusoidal signal in the step ② is 0.5 times of the speech speed, and the frequency of the basic sinusoidal signal is 60-80 Hz;
The frequency modulation method in step ③ specifically multiplies the basic sinusoidal signal and the speech speed related sinusoidal signal to generate a driving signal.
2. The fundamental frequency variable sounding method of claim 1, wherein: the physiological signal in step ① includes a voice signal of the user, and the interval between the front and rear voices in the voice signal is calculated by a voice segmentation algorithm to form voice speed information.
3. The fundamental frequency variable sounding method of claim 1, wherein: the physiological signal in step ① includes the surface electromyographic signals of the two cheek muscles of the user, and the speech rate information is formed by extracting the average peak interval of the surface electromyographic signals.
4. An adaptive variable fundamental frequency electronic artificial larynx for implementing the fundamental frequency variable sounding method of any one of claims 1 to 3, characterized in that:
The voice analysis system (1) is used for collecting physiological signals of a user and extracting speech speed information in the physiological signals;
The driving system (2) is used for analyzing the speech speed change in the speech speed information, generating a driving signal, amplifying the driving signal and driving the micro electric-force conversion system;
and the miniature electric-force conversion system (3) is used for converting the driving signal into mechanical vibration and emitting electronic artificial larynx voice.
5. The adaptive variable fundamental frequency electronic artificial larynx according to claim 4, wherein: the power supply device also comprises a power supply module (4) and a control switch (5).
6. The adaptive variable fundamental frequency electronic artificial larynx according to claim 4, wherein said speech analysis system (1) comprises:
the physiological signal acquisition module (6) is used for acquiring physiological signals of a user, converting the acquired analog signals into digital signals and providing the digital signals to the signal processing module;
and the signal processing module (7) is used for extracting the speech speed information in the physiological signal.
7. The adaptive variable fundamental frequency electronic artificial larynx according to claim 6, wherein: the physiological signal acquisition module (6) comprises a microphone and/or an myoelectricity acquisition electrode.
8. The adaptive variable fundamental frequency electronic artificial larynx according to claim 4, wherein said driving system (2) comprises:
The singlechip (8) is used for generating a variable speech speed related sinusoidal signal and a basic sinusoidal signal according to the extracted speech speed information;
The fundamental frequency generation module (9) carries out frequency modulation on the speech speed related sinusoidal signal and the basic sinusoidal signal to synthesize a driving signal;
And the signal amplifying circuit (10) amplifies the power of the driving signal and drives the micro electro-mechanical conversion system to work normally.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003263199A (en) * | 2002-03-11 | 2003-09-19 | Tokyo Denki Univ | Speech speed converting processor |
| CN101991475A (en) * | 2009-08-31 | 2011-03-30 | 北京航空航天大学 | Air pressure type base frequency-adjusted electronic artificial throat |
| CN103680491A (en) * | 2012-09-10 | 2014-03-26 | 财团法人交大思源基金会 | Speed dependent prosodic message generating device and speed dependent hierarchical prosodic module |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2010004397A1 (en) * | 2008-07-11 | 2010-01-14 | University Of Witwatersrand, Johannesburg | An artificial larynx |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003263199A (en) * | 2002-03-11 | 2003-09-19 | Tokyo Denki Univ | Speech speed converting processor |
| CN101991475A (en) * | 2009-08-31 | 2011-03-30 | 北京航空航天大学 | Air pressure type base frequency-adjusted electronic artificial throat |
| CN103680491A (en) * | 2012-09-10 | 2014-03-26 | 财团法人交大思源基金会 | Speed dependent prosodic message generating device and speed dependent hierarchical prosodic module |
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