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Measurement system and decomposition method for integral sound vibration and firmware vibration of violin

A measurement system and violin technology, applied in the direction of measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problems of non-contact firmware vibration measurement, multi-order cavity vibration decomposition, and violin high-precision measurement.

Pending Publication Date: 2017-02-01
SHANXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has not been able to achieve high-precision measurement of the overall acoustic vibration of the violin, nor can it realize the non-contact firmware vibration measurement and the decomposition of multi-order cavity vibration from the overall acoustic vibration

Method used

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  • Measurement system and decomposition method for integral sound vibration and firmware vibration of violin
  • Measurement system and decomposition method for integral sound vibration and firmware vibration of violin
  • Measurement system and decomposition method for integral sound vibration and firmware vibration of violin

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Embodiment Construction

[0030] The present invention is further described in conjunction with the accompanying drawings

[0031] Such as figure 1The measurement system of a violin overall acoustic vibration and firmware vibration includes a violin excitation device, an acoustic sensor, an acoustic signal amplifier, an analog-to-digital converter, and a computer acoustic analysis system; it is characterized in that it also includes a laser scanning front end, an optical signal amplifier , a photoelectric signal converter, a violin fixing bracket; the giant magnetostrictive transducers of two frequency bands with an excitation frequency of 20Hz-11kHz and 9.5kHz-21kHz are set in the described excitation device; the described violin is fixed on the violin On the frame, the excitation device is fixed at the chin rest position of the violin so that the pulling arm pulls the strings; the acoustic sensor is placed 1 meter in front of the f hole of the violin to be tested; the laser scanning front end is plac...

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PUM

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Abstract

The invention provides a measurement system and decomposition method for integral sound vibration and firmware vibration of a violin. The measurement system comprises a violin excitation device, an acoustic sensor, an acoustic signal amplifier, an analog-to-digital converter, a computer acoustics analysis system, a laser scanning front end, an optical signal amplifier and a converter. A super-magnetostrictive transducer with two-bands of 20Hz to 11kHz and 9.5kHz to 21kHz is arranged in the excitation device. The sound sensor receives an integral sound vibration signal of the violin, and carries out amplification, conversion and computer processing to generate a violin integral sound vibration spectrogram. The laser scanning front end focuses laser to collect a violin firmware vibration optical signal, and carries out amplification, conversion and computer processing to generate a firmware vibration spectrogram. Firmware vibration and integral sound vibration spectrograms are compared, and a multi-stage cavity vibration spectrogram is acquired through decomposing. The invention provides a feasible technology and method for tone adjustment and acoustic quality objective appraisal in a violin making process and teaching and performance study of the violin.

Description

technical field [0001] The invention relates to the production, acoustic measurement and timbre evaluation of musical instruments, in particular to a measurement system for the overall acoustic vibration and firmware vibration of a violin, and a method for decomposing the multi-order cavity vibration of the violin from the overall acoustic vibration and firmware vibration. Background technique [0002] The violin is one of the man-made musical instruments with the most harmonious vibration and the most beautiful sound. With the improvement of human cognition of resonance, many experts and scholars have shown interest in the study of the vibration mode of each acoustic component of the violin and its relationship with the overall acoustic vibration. [0003] Analyzing and studying the natural frequency and coupling problems of each firmware and multi-order cavity of the violin will help to learn from the overall acoustic vibration characteristics of the violin, and adjust eac...

Claims

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Application Information

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IPC IPC(8): G01H17/00G01H9/00
CPCG01H9/00G01H17/00
Inventor 杨阳
Owner SHANXI UNIV
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