阅读说明：本技术 基于声学参量阵技术的病理语音助讲系统 (Pathological voice talkback assisting system based on acoustic parametric array technology ) 是由 王立 马英楠 高星 于 2020-12-23 设计创作，主要内容包括：本发明公开了一种基于声学参量阵技术的病理语音助讲系统,包括：电源模块(1),用于为整个系统提供电源；声门波存储单元(2),用于以数字形式存储患者原始发音的声门波信号(13)；驱动系统(3),用于调节声门波信号(13)的频率以及声门波信号(13)和载波正弦信号(12)的幅度,以驱动声学参量阵(5)发声；载波发生器(4),用于产生与声学参量阵(5)使用的超声换能器中心频率一致的载波正弦信号(12)；声学参量阵(5),用于发射调幅后的超声波；控制开关(6),用于控制整个系统。本发明不会产生辐射噪声,具有个性化特征,且语音清晰易懂。(The invention discloses a pathological voice talkback system based on an acoustic parametric array technology, which comprises: the power supply module (1) is used for providing power supply for the whole system; a glottal wave storage unit (2) for storing, in digital form, a glottal wave signal (13) of the patient's original pronunciation; the driving system (3) is used for adjusting the frequency of the glottal wave signal (13) and the amplitudes of the glottal wave signal (13) and the carrier sinusoidal signal (12) so as to drive the acoustic parametric array (5) to sound; a carrier generator (4) for generating a carrier sinusoidal signal (12) coinciding with the center frequency of the ultrasonic transducer used by the acoustic parametric array (5); an acoustic parametric array (5) for transmitting amplitude-modulated ultrasonic waves; and the control switch (6) is used for controlling the whole system. The invention does not generate radiation noise, has personalized characteristics and clear and understandable voice.)

1. Pathological voice talkback system based on acoustic parametric array technology is characterized by comprising:

the power supply module (1) is used for providing power supply for the whole system;

a glottal wave storage unit (2) for storing, in digital form, a glottal wave signal (13) of the patient's original pronunciation;

the driving system (3) is used for adjusting the frequency of the glottal wave signal (13) and the amplitudes of the glottal wave signal (13) and the carrier sinusoidal signal (12) so as to drive the acoustic parametric array (5) to sound;

a carrier generator (4) for generating a carrier sinusoidal signal (12) coinciding with the center frequency of the ultrasonic transducer used by the acoustic parametric array (5);

an acoustic parametric array (5) for transmitting amplitude-modulated ultrasonic waves;

and the control switch (6) is used for controlling the whole system.

2. The pathological voice assistant system based on acoustic parametric array technology according to claim 1, characterized in that: the frequency range of the carrier sine signal (12) is 22 kHz-100 kHz.

3. The pathological voice assistant system based on acoustic parametric array technology according to claim 1, characterized in that: the drive system (3) comprises:

a frequency adjustment module (7) for adjusting the frequency of the glottal wave signal (13);

the amplitude modulation module (8) is used for carrying out amplitude modulation on the glottal wave signal (13) and the carrier sine signal (12) to generate a modulation signal (14);

and the power amplifier (9) is used for amplifying the power of the modulation signal (14) so as to drive the acoustic parametric array to work and emit ultrasonic waves.

4. The pathological voice assistant system based on acoustic parametric array technology according to claim 3, characterized in that: the frequency adjusting module (7) adjusts the frequency variation range of the glottal wave signal (13) to be 60 Hz-180 Hz.

5. The pathological voice assistant system based on acoustic parametric array technology according to claim 1, characterized in that: the acoustic parametric array (5) comprises:

a substrate (10) for providing a carrier for an ultrasound transducer array (11);

the ultrasonic transducer array (11) is composed of a plurality of ultrasonic transducers (15) with the same center frequency.

6. The pathological voice assistant system based on acoustic parametric array technology according to claim 5, characterized in that: the center frequency of the ultrasonic transducer (15) is 22 kHz-100 kHz.

7. The pathological voice assistant system based on acoustic parametric array technology according to claim 5, characterized in that: the ultrasonic transducer array (11) is arranged in a circular array or a rectangular array.

8. The pathological voice assistant system based on acoustic parametric array technology according to claim 1, characterized in that: the acoustic parametric array is characterized by further comprising a shell (19), a control circuit board (17) is arranged in the shell (19), the acoustic parametric array (5) is connected with the control circuit board (17) through a driving wire harness (16), the glottal wave storage unit (2), the driving system (3) and the carrier wave generator (4) are integrated on the control circuit board (17), and the control circuit board (17) is connected with the power module (1) through a power line (18).

9. The use method of the pathological voice assistant system based on the acoustic parametric array technology according to any one of claims 1 to 8, characterized in that: the method comprises the steps that a normal voice glottal wave signal (13) stored in a glottal wave storage unit (2) in advance is utilized, an acoustic parametric array (5) is driven to emit ultrasonic waves after amplitude modulation is carried out on a driving system (3) and a carrier sine signal (12), the ultrasonic waves emitted by the acoustic parametric array (5) are self-demodulated into the glottal wave signal (13) in a patient body, and the patient can emit normal voice.

Technical Field

The invention relates to a voice help-speaking system for a patient with voice deficiency, in particular to a pathological voice help-speaking system based on an acoustic parametric array technology.

Background

Laryngectomy is the only treatment option for patients with terminal laryngeal carcinoma, and surgically resects the patient's larynx and vocal cords, making the patient a "throat-free person". The vocal cords vibrate and sound to form a sound source (glottal wave), plays a very important role in a voice generating system, and due to the absence of the sound source, a person without a throat loses the voice function, can not exchange voice normally, the life quality is seriously reduced, and great physical and psychological pains are borne.

In the prior art, an electronic artificial larynx is one of the commonly used speech-aid systems, and the electronic artificial larynx drives an armature to impact a diaphragm to vibrate to generate a sound source by using a voice coil, and the sound is transmitted into a sound channel through neck tissues and modulated into speech. The design not only brings a serious radiation noise problem, but also has a great difference between a reconstructed sound source and an original glottal wave, and has the problems of speech mechanics and lack of normal human voice characteristics, and also has the problems of low speech intelligibility, unsatisfactory sound production effect and lower reliability.

Therefore, the existing voice help-speaking system for helping the voice patient has the problems of radiation noise, lack of normal human voice characteristics and low voice intelligibility.

Disclosure of Invention

The invention aims to provide a pathological voice talkback assisting system based on an acoustic parametric array technology. The invention does not generate radiation noise, has personalized characteristics and clear and understandable voice.

The technical scheme of the invention is as follows: pathological voice talkback system based on acoustic parametric array technology includes:

the power supply module is used for providing power supply for the whole system;

a glottal wave storage unit for storing a glottal wave signal of an original pronunciation of a patient in a digital form;

the driving system is used for adjusting the frequency of the glottal wave signal and the amplitude of the carrier sinusoidal signal so as to drive the acoustic parametric array to sound;

the carrier wave generator is used for generating a carrier wave sinusoidal signal consistent with the center frequency of the ultrasonic transducer used by the acoustic parametric array;

the acoustic parametric array is used for transmitting the ultrasonic waves after amplitude modulation;

and the control switch is used for controlling the whole system.

In the pathological voice intercom system based on the acoustic parametric array technology, the frequency range of the carrier sinusoidal signal is 22kHz to 100 kHz.

In the pathological voice help-speaking system based on the acoustic parametric array technology, the driving system includes:

the frequency adjusting module is used for adjusting the frequency of the glottal wave signal;

the amplitude modulation module is used for carrying out amplitude modulation on the glottal wave signal and the carrier sine signal to generate a modulation signal;

and the power amplifier is used for amplifying the power of the modulation signal so as to drive the acoustic parametric array to work and send out ultrasonic waves.

In the pathological voice intercom system based on the acoustic parametric array technology, the frequency adjusting module adjusts the frequency variation range of the glottal wave signal to be 60-180 Hz.

In the pathological voice help-speaking system based on the acoustic parametric array technology, the acoustic parametric array includes:

a substrate for providing a carrier for an ultrasound transducer array;

the ultrasonic transducer array is composed of a plurality of ultrasonic transducers with consistent center frequencies.

In the pathological voice intercom system based on the acoustic parametric array technology, the center frequency of the ultrasonic transducer is 22kHz to 100 kHz.

In the pathological voice intercom system based on the acoustic parametric array technology, the ultrasonic transducer array is arranged in a circular array or a rectangular array.

In the pathological voice help-to-speak system based on the acoustic parametric array technology, the pathological voice help-to-speak system further comprises a shell, a control circuit board is arranged in the shell, the acoustic parametric array is connected with the control circuit board through a driving wire harness, the glottal wave storage unit, the driving system and the carrier wave generator are integrated on the control circuit board, and the control circuit board is connected with the power module through a power line.

The method for using the pathological voice intercom system based on the acoustic parametric array technology comprises the steps of utilizing a normal voice glottal wave signal stored in a glottal wave storage unit in advance, driving an acoustic parametric array to emit ultrasonic waves after amplitude modulation is carried out on the normal voice glottal wave signal and a carrier sinusoidal signal through a driving system, and enabling the patient to emit normal voice by self-demodulating the ultrasonic waves emitted by the acoustic parametric array into the glottal wave signal in the body of the patient.

Compared with the prior art, the invention utilizes the acoustic parametric array to generate low-frequency sound wave audible sound waves with sharp directivity in human head and neck tissues, loads glottal wave signals suitable for the pronunciation characteristics of a person without larynx into ultrasonic carriers, demodulates the glottal wave signals at the tracheal mucosa of a human body by utilizing the acoustic parametric array technology, reconstructs a sound source with personal glottal wave characteristics, and reconstructs the sound source with the glottal wave characteristics of the person without larynx in a sound channel.

Therefore, the invention does not generate radiation noise, has personalized characteristics and has clear and understandable voice.

Drawings

FIG. 1 is a block diagram of a structure according to the present invention;

FIG. 2 is a block diagram of a drive system;

FIG. 3 is a block diagram of the structure of an acoustic parametric array;

FIG. 4 is a schematic diagram of an amplitude modulation method for a glottal signal and a carrier sinusoidal signal;

FIG. 5 is a schematic diagram of a structure of an acoustic parametric array;

fig. 6 is a schematic structural diagram of the present invention.

The labels in the figures are: 1. a power supply module; 2. a glottal wave storage unit; 3. a drive system; 4. a carrier wave generator; 5. an acoustic parametric array; 6. a control switch; 7. a frequency adjustment module; 8. an amplitude modulation module; 9. a power amplifier; 10. a substrate; 11. an ultrasonic transducer array; 12. a carrier sinusoidal signal; 13. a glottal wave signal; 14. modulating the signal; 15. an ultrasonic transducer; 16. driving the wire harness; 17. a control circuit board; 18. a power line; 19. a housing.

Detailed Description

The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.

Examples are given.

As shown in fig. 1, the pathological voice help system based on the acoustic parametric array technology includes: the device comprises a power module 1, a glottal wave storage unit 2, a driving system 3, a carrier generator 4, an acoustic parametric array 5 and a control switch 6.

The power supply module 1 is used for providing power supply for the whole system;

a glottal wave storage unit 2 for storing a glottal wave signal of an original pronunciation of a patient in a digital form; the signal can come from the normal voice of the patient before illness, and can also come from other normal human voices similar to the pronunciation of the patient.

The driving system 3 is used for adjusting the frequency of the glottal wave signal, modulating the amplitude of the glottal wave signal and the amplitude of the carrier sinusoidal signal, and then performing power amplification to drive the acoustic parametric array 5 to emit ultrasonic waves; as shown in fig. 2, the driving system 3 includes: a frequency adjustment module 7, an amplitude modulation module 8 and a power amplifier 9.

The frequency adjusting module 7 is configured to adjust the frequency of the glottal wave signal, where the frequency is the sounding fundamental frequency of the voice; the frequency adjusting module can set the glottal wave frequency variation range to be 60 Hz-180 Hz according to the voice base frequency of the speaker. The amplitude modulation module 8 is configured to perform amplitude modulation on the glottal wave signal and the carrier sinusoidal signal, and may modulate the glottal wave signal on the carrier sinusoidal signal by using an amplitude modulation algorithm to generate a modulation signal; and the power amplifier 9 is used for amplifying the power of the modulation signal so as to drive the acoustic parametric array to work and emit ultrasonic waves.

A carrier generator 4 for generating a carrier sinusoidal signal having a frequency identical to the center frequency of the ultrasonic transducer used by the acoustic parametric array 5; the frequency range of the carrier sine signal is 22 kHz-100 kHz.

The acoustic parametric array 5 is used for transmitting the amplitude-modulated ultrasonic wave;

as shown in fig. 3, the acoustic parametric array 5 includes: a substrate 10 and an ultrasonic transducer array 11, wherein the substrate 10 is used for providing a carrier for the ultrasonic transducer array 11; the ultrasonic transducer array 11 is composed of a plurality of ultrasonic transducers with the same center frequency, and the center frequency of each ultrasonic transducer is 22 kHz-100 kHz. The ultrasonic transducer array 11 is arranged in a circular array or a rectangular array.

And the control switch 6 is used for controlling the on and off of the whole system.

The method for using the pathological voice intercom system based on the acoustic parametric array technology comprises the steps of utilizing a normal voice glottal wave signal stored in the glottal wave storage unit 2 in advance, driving the acoustic parametric array 5 to emit ultrasonic waves after amplitude modulation is carried out on the normal voice glottal wave signal and a carrier sine signal through the driving system 3, wherein the amplitude modulated ultrasonic waves are transmitted in a medium and can be self-demodulated due to a nonlinear effect, the carrier is attenuated, the glottal waves modulated on the amplitude modulated ultrasonic waves are left and reach the position of the neck, and a patient can emit normal voice.

The working principle of the invention is as follows:

fig. 4 is a schematic diagram of an amplitude modulation method of a glottal wave signal and a carrier sinusoidal signal in the present invention. Including a carrier sinusoidal signal 12, a glottal signal 13, an amplitude modulation module 8 and a modulation signal 14. The carrier sinusoidal signal 12 is a sinusoidal signal with a frequency of 40kHz and the glottal signal 13 is extracted from the patient speech signal with a frequency of 75 Hz. The amplitude modulation module 8 performs amplitude modulation on the carrier sinusoidal signal 12 and the glottal signal 13 by using a double-sideband amplitude modulation algorithm, wherein the modulation coefficient is 0.6. The generated modulation signal 14 has a frequency of 40kHz, and the upper and lower sidebands are loaded with 75Hz glottal wave envelopes.

Fig. 5 is a schematic structural diagram of a circular array of the acoustic parametric array of the present invention, which includes a substrate 10 and an ultrasonic transducer array 11. The ultrasonic transducer array 11 is composed of 7 ultrasonic transducers 15 with a center frequency of 40kHz, and is arranged in a circular array (one in the center and six around). The substrate 10 is a sheet of bakelite material with a perforated plate that can mount the ultrasound transducer array 11 and allow the passage of wires.

Fig. 6 is a schematic structural diagram of the present invention, which is a handheld device, and includes a housing 19, a control circuit board 17 is disposed in the housing 19, the acoustic parametric array 5 is connected to the control circuit board 17 through a driving wire harness 16, the glottal wave storage unit 2, the driving system 3, and the carrier generator 4 are all integrated on the control circuit board 17, and the control circuit board 17 is connected to the power module 1 through a power line 18. In this embodiment, the power module 1 is composed of 2-section 3.7V lithium batteries. The parts are all packaged in the shell 19, the control switch 6 is positioned on the outer side of the shell 19, the acoustic parametric array 5 is pressed against the skin of the lower jaw of a user, the user presses the control switch 6, the acoustic parametric array 5 sends out ultrasonic waves, the ultrasonic waves are self-demodulated into glottal waves with low frequency in a human body, and normal voice is sent out through oral modulation.