本发明涉及兼具负有效质量密度和负有效体弹模量的声学功能材料，其具有至少个管状部分、以及密封该管状部分两端的前薄膜和后薄膜。所述密封该管状部分的前薄膜和后薄膜将该管状部分充分密封，从而建立起由该管状部分和所述前薄膜及后薄膜限定的密封或受限的封闭流体空间，并杜绝因声学振动而导致的流体流失或流体摄入。在所述前薄膜和后薄膜上设置对片状物，使得这对片状物中的者大体上处于所述前薄膜的中心，而另者大体上处于所述后薄膜的中心。The present invention relates to an acoustic functional materials with the negative effective mass density and elastic modulus of the negative active material having at least one tubular portion, and the sealing of the film before and after the film ends of the tubular portion. The sealing of the tubular film before and after the film portion of the tubular seal portion sufficiently to establish a fluid space is closed by the front portion and the tubular film and sealing the film after a defined or limited, due to acoustic vibrations and eliminate the cause fluid loss or fluid intake. Film disposed on the front and back of the film sheet, which is generally at the center so that the center of the front sheet of the film in those, and the other substantially at the back by the film.
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