Testing method of characteristics of sound vibration and point vibration of piano sound board and special equipment thereof

A technology of vibration characteristics and special equipment, which is applied to the analysis of solids, instruments, stringed instruments, etc. by using sound waves/ultrasonic waves/infrasonic waves, and can solve problems such as no detection methods for sound vibration characteristics, and achieve intuitive, fast and accurate measurement and high sensitivity. Effect

Inactive Publication Date: 2010-08-04
王宏伟
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] The present invention mainly solves the problem that there is no scientific sound vibration characteristic detection method in the production process of the piano soundb

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  • Testing method of characteristics of sound vibration and point vibration of piano sound board and special equipment thereof
  • Testing method of characteristics of sound vibration and point vibration of piano sound board and special equipment thereof
  • Testing method of characteristics of sound vibration and point vibration of piano sound board and special equipment thereof

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Embodiment Construction

[0039] The present invention will be described in detail below in conjunction with specific embodiments and the drawings of the specification.

[0040] 1. Special equipment for piano soundboard acoustic vibration and point vibration characteristics

[0041] This embodiment provides a special equipment for piano soundboard acoustic vibration and point vibration characteristics, according to figure 1 Connection, the principle is like figure 2 As shown, including signal generator, power amplifier, audio transducer, measurement microphone, measurement amplifier, vibration sensor, charge amplifier, signal conditioner, data collector, spectrum analysis software and computer, the spectrum analysis software is installed on the computer Above, the signal generator, power amplifier and audio transducer are connected, the measurement microphone and measurement amplifier are connected to the data collector, the vibration sensor, charge amplifier, and signal conditioner are connected to the da...

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Abstract

The invention discloses a testing method of characteristics of sound vibration and point vibration of a piano sound board and special equipment thereof. The testing method of sound vibration and point vibration comprises the steps of applying the modern technologies, such as magnetostriction, audio measurement, vibration measurement, computer frequency spectrum analysis and the like in the manufacturing process of the piano sound board, utilizing a sound sensor and a vibration sensor for respectively detecting an integral sound vibration signal of the sound board and a point vibration signal of a local area, then analyzing the comprehensive vibration characteristics of the sound board through a computer frequency spectrum system, and further realizing the oriented tuning of the sound board. The method has the advantages of high sensitivity, fast and accurate measurement and strong intuition, and can effectively control the sound of the sound board and provide the scientific method andmeans for objective identification, evaluation and tuning of the acoustic quality of the piano sound board.The special equipment for testing of the characteristics of the sound vibration and the point vibration of the piano sound board mainly comprises an audio sweep signal generator, a magnetostrictive audio transducer, a measurement microphone, an accelerometer, a data acquisition card, professional frequency spectrum analysis software, a computer and the like.

Description

Technical field [0001] The invention relates to the field of musical instrument production and acoustic quality testing, in particular to a method and special equipment for testing acoustic vibration and point vibration characteristics of a piano soundboard. Background technique [0002] Predecessors’ research results and actual production experience have shown that only a few kinds of wood are suitable for making piano soundboards, among which spruce wood is the best material for making piano soundboards. The soundboard of modern upright pianos and grand pianos consists of three parts, namely the resonance board (thin wooden board glued by many small slats), bridge (square wooden strip pasted on the front of the resonance board), and ribs (resonance board) The same number of wood strips are pasted on the back of the resonant board). The function of the soundboard is to effectively convert the vibration energy of the strings into the vibration of the air through the resonance me...

Claims

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Application Information

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IPC IPC(8): G01N29/04G01N29/12G10C3/06G10C9/00
Inventor 王宏伟王诗华
Owner 王宏伟
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