| 摘要 |
PURPOSE: An anechoic chamber-cum-contracted acoustic test system is provided to reduce investment costs, to improve productivity, and to facilitate the separation, withdrawal, and insertion of acoustic materials. CONSTITUTION: An anechoic chamber-cum-contracted acoustic test system comprises a main body of an anechoic chamber-cum-contracted acoustic test lab(10), an unmoving object support member, and an acoustic material(20). The main body of the anechoic chamber-cum-contracted acoustic test lab comprises a sound insulating material(11) and a sound absorbing material(12). The sound insulating material is composed of concrete and is a hexahedron. The sound absorbing material is attached to the inner surface of the sound insulating material and is formed by a wedge-shaped polyurethane foam. The unmoving objet support member is selectively inserted in the main body of the anechoic chamber-cum-contracted acoustic test lab. Rollers(27) guide rails(26) so that acoustic members can be inserted into or drawn out from the main body of the anechoic chamber-cum-contracted acoustic test lab. The rollers are installed in the front and rear ends of the bottom surface of the acoustic material at an interval same as the rails.
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