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Vocal-cord vibration nondestructive measurement method utilizing natural sound track ultraphonic waveguide effect

A technology of vocal cord vibration and measurement method, applied in ultrasonic/sonic/infrasonic diagnosis, ultrasonic/sonic/infrasonic Permian technology, ultrasonic/sonic/infrasonic image/data processing, etc., can solve problems such as limited application scope, Achieve the effect of simple measurement equipment, easy laryngeal function examination, high safety and ease of use

Inactive Publication Date: 2014-07-30
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods are based on optical imaging methods, but due to the linear propagation characteristics of light and the natural curved shape of the vocal tract, when using laryngoscope or high-speed video endoscope to detect vocal cord vibration, the optical fiber must be inserted into the vocal tract or the patient must Maintain a specific posture, therefore, these methods are not completely non-invasive measurement methods, and their application range is limited
All in all, the currently commonly used vocal cord vibration detection methods have their shortcomings and application limitations

Method used

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  • Vocal-cord vibration nondestructive measurement method utilizing natural sound track ultraphonic waveguide effect
  • Vocal-cord vibration nondestructive measurement method utilizing natural sound track ultraphonic waveguide effect
  • Vocal-cord vibration nondestructive measurement method utilizing natural sound track ultraphonic waveguide effect

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Experimental program
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Effect test

Embodiment 1

[0041] like figure 2 As shown in the figure, the subject was asked to breathe into the port of the Y-shaped catheter, but not to make a sound. The signal generator generates a sinusoidal signal with a frequency of 350kHz, and an ultrasonic wave with a frequency of 350kHz is generated by an air ultrasonic transducer for emission. Guided by the Y-shaped catheter, the ultrasound is directed to the oral cavity. The ultrasonic echo is received by another receiving air ultrasonic transducer, amplified and sampled at a sampling frequency of 100MHz, and stored in the computer. After the ultrasonic echo signal is demodulated by Hilbert transform, the Doppler frequency can be obtained. In this silent situation, since the body belt does not vibrate, the ultrasonic reflective surface is a static surface. The Doppler frequency value obtained by the method of the present invention is also very small, according to the formula and , the velocity and displacement of vocal cord vibratio...

Embodiment 2

[0043] like image 3 As shown, the subject is required to utter the voice / a / to the port of the Y-shaped catheter, and the waveform of the voice signal is as follows figure 2 (d) shown. The signal generator generates a sinusoidal signal with a frequency of 350kHz, and an ultrasonic wave with a frequency of 350kHz is generated by an air ultrasonic transducer for emission. Guided by the Y-shaped catheter, the ultrasound is directed to the oral cavity. The ultrasonic echo is received by another receiving air ultrasonic transducer, amplified and sampled at a sampling frequency of 100MHz, and stored in the computer. After the ultrasonic echo signal is demodulated by Hilbert transform, the Doppler frequency can be obtained. The production of in-ear speech is only audible high-speed turbulent noise generated by squeezing the high-speed airflow through the glottis, and a non-periodic irregular speech produced by vocal tract modulation. The vocalization process of in-ear speech do...

Embodiment 3

[0045] like Figure 4 As shown, the subject is required to face the port of the Y-shaped catheter and pronounce the vowel / a / in a normal sounding manner. The signal generator generates a sine signal with a frequency of 350 kHz, and the air ultrasonic transducer for emission generates a frequency of 350kHz ultrasonic. Guided by the Y-shaped catheter, the ultrasound is directed to the oral cavity. The ultrasonic echo is received by another receiving air ultrasonic transducer, amplified and sampled at a sampling frequency of 100MHz, and stored in the computer. After the ultrasonic echo signal is demodulated by Hilbert transform, the Doppler frequency can be obtained.

[0046] The production of vowels is the result of the glottis being excited by the vibration of the body belt, which periodically vibrates during the vocalization of the vowel. It can be measured by adopting the method of the invention that, under the condition of normal vowel sounding, the ultrasonic signal ref...

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Abstract

The invention discloses a non-destructive measurement method for vocal cord vibration using the ultrasonic waveguide effect of the natural vocal tract. Ultrasonic waves are excited by an air ultrasonic transducer and introduced into the oral cavity and vocal tract, and the ultrasonic waves propagate in the natural sound waveguide formed by the human vocal tract. And reach the vibrating vocal cords, after the reflection on the surface of the vocal cords, the ultrasonic wave is transmitted back to the oral cavity through the vocal tract and the reflected echo is detected by the air ultrasonic transducer. After digitizing the reflected signal, the frequency deviation of the reflected signal relative to the transmitted signal is calculated. The relative movement velocity of the ultrasonic reflection surface (ie, the vocal cord surface) is obtained through the Doppler frequency shift formula, and then the velocity value is integrated to obtain the movement displacement signal of the ultrasonic reflection surface. The vocal cord vibration measurement method proposed by the present invention does not need to extend the ultrasonic transducer into the depth of the vocal tract, nor does it require the patient to maintain a specific body posture to straighten the vocal tract, which has higher safety and ease of use sex.

Description

technical field [0001] The invention relates to a non-invasive detection method of vocal cord vibration, in particular to a method for detecting the vertical vibration of the upper surface of vocal cord by utilizing the ultrasonic conduction effect of human vocal tract and the Doppler frequency shift effect of ultrasonic waves. Background technique [0002] Vocal fold vibration is the sound source of human speech, and it plays a key role in the production of voice. At the same time, the vocal cords are also one of the important organs of the human body, and the abnormal vibration of the vocal cords is also closely related to many throat diseases, such as vocal cord nodules, vocal cord edema, and so on. Therefore, the detection of vocal cord vibration information is of great value not only for understanding the vocalization mechanism of normal and irregular speech, but also for the prevention, diagnosis, and evaluation of certain laryngeal diseases. It is for these reasons t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/08A61B8/00
Inventor 陶超蒋家琪吴丹刘晓峻
Owner NANJING UNIV
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