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Non-contact time varying vocal cord vibration detection signal processing method

A vocal cord vibration, non-contact technology, applied in the field of radar, can solve the problem that the inherent relationship of the signal has not been further discussed, and achieve the effect of easy implementation and good effect.

Inactive Publication Date: 2018-03-09
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] However, the inherent relationship between the signals detected by the radar and the signals detected by the microphone has not been further explored, and no relevant literature has reported this

Method used

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  • Non-contact time varying vocal cord vibration detection signal processing method
  • Non-contact time varying vocal cord vibration detection signal processing method
  • Non-contact time varying vocal cord vibration detection signal processing method

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Embodiment

[0047] combine figure 1 , The invention provides a non-contact time-varying vocal cord vibration detection signal processing method to obtain the time-varying vocal cord vibration frequency. Specifically include the following steps:

[0048] Step 1. The non-contact time-varying vocal cord vibration detection system obtains the original vocal cord vibration signal;

[0049] Step 2. Preprocessing the original vocal cord vibration signal obtained in step 1 to obtain a mean-removed vocal cord vibration signal;

[0050] Step 3. Decompose the fundamental frequency and higher harmonics with the variational mode decomposition algorithm on the pre-processed average value vocal cord vibration signal, and the two modes are respectively the fundamental frequency and harmonic signal waveforms of the vocal cord vibration signal;

[0051] Step 4, selecting the vocal cord vibration fundamental frequency signal waveform from the waveform signals of the two modes obtained in step 3;

[0052]...

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PUM

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Abstract

The invention discloses a non-contact time varying vocal cord vibration detection signal processing method. The method comprises the following processing steps: sending, by a non-contact time varyingvocal cord vibration detection system, orthogonal two-path signals, and performing complex demodulation on the orthogonal signals to obtain orthogonal demodulated signals; performing band-pass filtering, endpoint detection and segmentation on the orthogonal demodulated signals, decomposing fundamental frequency and higher harmonics by using a variational modal decomposition algorithm, then performing mode selection on the voice fundamental frequency obtained by manually calibrating microphone voice signals to obtain a vocal cord vibration fundamental frequency signal waveform, and performingtime frequency analysis and smoothing on the vocal cord vibration signal waveform to obtain a time varying vocal cord vibration frequency. The method is simple and easy to implement.

Description

technical field [0001] The invention relates to the field of radar, in particular to a method based on non-contact time-varying vocal cord vibration detection signal processing. Background technique [0002] The fundamental frequency signal of the speech is an important feature of the speech signal. And biomedical radar technology has been extended to make sense of speech signals. A new millimeter-wave microwave radar has been proposed to detect speech signals, and the quality of the obtained speech signals is comparable to that of microphone signals. [0003] However, the inherent relationship between the signals detected by the radar and the signals detected by the microphone has not been further explored, and there is no relevant literature reporting on it. Contents of the invention [0004] The object of the present invention is to provide a non-contact time-varying vocal cord vibration detection signal processing method to obtain the time-varying vocal cord vibratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/88G01H17/00
CPCG01H17/00G01S13/88
Inventor 洪弘朱雨倩李慧王芳季文韬李彧晟顾陈
Owner NANJING UNIV OF SCI & TECH
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