乐器用竹展平板的声学特性研究

Acoustic Characteristics of Flattened Bamboo Boards for Musical Instruments

竹材具有良好的声学性能,但目前竹质人造板在乐器中的应用并不广泛。对竹展平板的声学特性进行研究,探寻其可替代的木材音板种类,以期为乐器音板提供更多选择,提高竹材利用率。选用毛竹展平板,与红木、云杉进行声学特性比较研究,通过比较三者的振动性能与音色品质,初步确定毛竹展平板可替代的木材种类。结果表明:与红木、杉木相比,毛竹展平板的声学特性更接近于红木;其中无节去青去黄的毛竹展平板声学特性较好,最适合用作乐器音板。毛竹展平板或可代替与其密度接近的红木作为乐器音板。

Bamboo has good acoustic properties and is suitable for many musical instruments,but bamboo exhibition tablets are not widely used in musical instruments.In this study,through the study of the acoustic characteristics of bamboo exhibition flat plates,the alternative types of wood sound boards were explored,in order to provide more choices for musical instrument sound boards and improved the utilization rate of bamboo materials.The acoustic characteristics of the woolly bamboo exhibition plate were selected to compare the acoustic characteristics with mahogany and spruce,and the types of wood that could be replaced by the hairy bamboo exhibition plate were preliminarily determined by comparing the vibration performance and timbre quality of the three.The results showed that the acoustic characteristics of the bamboo slab were closer to that of mahogany compared with mahogany and fir.Among them,the knotless and anti-yellow hairy bamboo exhibition plate had the best acoustic characteristics and was most suitable for use as a musical instrument soundboard.The hairy bamboo exhibition tablet may replace the incense wood that is close to its density as a soundboard for musical instruments.