The relationship between sound structure materials and sound reproduction An ideal sound box should not vibrate with sound waves except the speaker diaphragm when working. On the contrary, it is mainly caused by insufficient thickness and weight of the box board. Therefore, when making a sound box, we should consider that the larger the volume and power of the sound box, the greater the relative air pressure in the box cavity, and the harder and thicker the wooden boards in the box wall, especially the front and rear boards are easy to vibrate, and the thickness of the boards is appropriately thicker than the side boards. The plate of the enclosed speaker is thicker than that of the inverted speaker. If it is a low speaker, its box board is much heavier than a Hi-Fi speaker. Because the natural resonance of thick plate is smaller than that of thin plate, the box plate with hard texture, heavy weight and certain thickness should be selected as far as possible. Because the enclosed speaker does not leak air, if the box board is too thin, it is easier to cause * * * vibration. If the box plate is excited to vibrate at a certain frequency, the energy of this frequency will be consumed in the vibration reduction of the plate, which is enough to produce deep valleys and seriously affect the sound quality. Only by thickening the box plate can the vibration of the box wall be effectively suppressed and the generation of standing waves be reduced. According to the empirical data of making sound box, the relationship between the size of speaker aperture and the thickness of box plate is as follows: speaker aperture
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