Since glass is the weakness of building insulation, it is urgent to evaluate acoustical glazing systematically and find new test methods to accelerate application and manufacture of acoustical glass.
Sound absorption and insulation is the acoustical characteristic of material. Measurement of sound absorption and insulation has an important significance in noise control and acoustical design.
吸声与隔声是材料的声学特性，吸声与隔声测量对噪声控制与声学设计具有重要意义。
3
Music classrooms need to satisfy acoustical requirements of sound insulation and sound absorption.