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Acoustic sheet and method of manufacturing acoustic sheet

A manufacturing method and sound technology, applied in the fields of diaphragm structure, thin material processing, transportation and packaging, etc., can solve problems such as large differences in sound characteristics, and achieve excellent sound characteristics

Active Publication Date: 2012-04-04
YAMAHA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there is a problem that there is a large difference in acoustic characteristics between musical instruments using existing synthetic resin sheets and musical instruments using natural materials such as wood and leather.
Specifically, for example, when a conventional synthetic resin sheet is used as the head material of a percussion instrument, compared with a percussion instrument using a natural material as the head material, there is a difference in acoustic characteristics such as treble remaining in the ear.

Method used

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  • Acoustic sheet and method of manufacturing acoustic sheet
  • Acoustic sheet and method of manufacturing acoustic sheet
  • Acoustic sheet and method of manufacturing acoustic sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] According to the method shown below, the acoustic sheet 10 of Example 1 was manufactured.

[0070] First, a substrate 1 is prepared, which is a synthetic resin sheet made of biaxially oriented PET (polyethylene terephthalate) (trade name "Lumirror", manufactured by Toray Co., Ltd.) with a thickness of 250 μm and uniform crystal orientation production. Next, a support material 5 made of foam rubber (hardness Hs65°) is placed in contact with one surface of the base 1. Then, a shot blasting machine (manufactured by Fuji Seiki Co., Ltd.) was used to collide with a plurality of impact particles 7 uniformly dispersed across the entire surface of the substrate 1 from the other surface of the substrate 1 to locally apply an impact to the substrate 1.

[0071] As the impact particles 7, zircon particles (trade name "FZS-425", manufactured by Fuji Manufacturing Co., Ltd.) having a particle size of 425 μm were used. In addition, set the pressure at which the impact particles 7 impact...

Embodiment 2

[0077] Instead of using the support material 5, a part of the substrate 1 is supported by a support member. A space can be provided on the surface of the substrate 1 opposite to the surface on which the impact is applied. Zircon particles with a particle size of 850 μm (trade name "FZS -850", manufactured by Fuji Manufacturing Co., Ltd.) As the impact particles 7, the acoustic sheet 10 of Example 2 was manufactured in the same manner as in Example 1 except for this.

Embodiment 3

[0079] The acoustic sheet 10 of Example 3 was manufactured in the same manner as in Example 1 except that zircon particles (trade name "FZS-600", manufactured by Fuji Seisakusho) having a particle diameter of 600 μm were used as the impact particles 7.

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Abstract

In an acoustic sheet which can be used as a head material of a percussion instrument or a head material for a sound box of a string instrument, a plurality of change regions having a crystalline orientation different from a base are dispersed into the base made of a synthetic resin sheet having a uniform crystalline orientation. The acoustic sheet can include a delamination which is formed by delaminating the synthetic resin sheet in a thickness direction.

Description

[0001] This application claims priority based on Japanese Patent Application No. 2010-189630 filed in Japan on August 26, 2010, and the content is also cited here. Technical field [0002] The present invention relates to a method for manufacturing acoustic sheets and acoustic sheets used in materials such as musical instruments, speakers, and room acoustic conditioning materials. In particular, the present invention relates to an acoustic sheet and a method for manufacturing an acoustic sheet capable of obtaining excellent acoustic characteristics, the acoustic characteristics of which are close to those of natural materials such as wood and leather, and the acoustic sheet is suitable for use as a tambourine, Head materials for percussion instruments such as bass drums and bonding materials for resonance boxes of stringed instruments such as shamisen and banjo. Background technique [0003] In the past, there have been synthetic materials such as resin sheets for acoustic sheets ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R7/04H04R31/00
CPCB29C67/0011B29K2995/0001B29C71/0063G10K11/168G10K13/00Y10T156/1105Y10T428/31504
Inventor 中岛弘铃木克典福岛敏晴奥村幸正井上公词
Owner YAMAHA CORP