Investigation of the sound absorption performance of multilayer non-homogenous wave-guide;
多层非均匀波导吸声特性研究
Broadband resonance sound absorption and it′s principle for low frequency;
低频宽带共振吸声结构与原理
Study on the properties of air permeability,luster and sound absorption of milling wool fabric by washing;
洗涤缩绒对羊毛织物透气、光泽和吸声性能的影响
The noise-deadening property was also analyzed and pointed that it was a new composite material which has much high performance such as excellent noise-deadening and acoustic absorption etc.
选择聚丙烯为纤维原料采用纺丝成网法制成吸声非织造布,以铜、铁粉末为主要隔声材料采用挤出成型工艺制成隔声片材,经化学粘合复合工艺研制出非织造降噪复合材料。
The results show that in the frequency range of 125~1 600 Hz, the acoustic absorption performance improved, but the soundproof property improved at the low frequency and decreased beyond 500 Hz.
测试结果表明,在声频125～1600Hz的范围内,极化后的吸声性能增加,而隔声量在低频增加,在中高频(500Hz以上)降低。
sound - absorbing material and sound - absorbingconstruction
吸声材料和吸声结构
average sound absorption coefficient
平均吸声系数,平均吸声率
The gradation of sound absorption property for absorbent products
GB/T16731-1997建筑吸声产品的吸声性能分级
sound-absorbing perforated asbestos cement panel
吸声带孔石棉水泥板
Rudimentary Researches on the Acoustic Characteristics of Microperforated Panel Absorbers with Alterable Air-Cavity;
不等腔微穿孔板组合吸声结构的吸声特性初探
A review of underwater anechoic coating structure and absorption theories
水下吸声覆盖层结构及吸声机理研究进展
The Study of the Theory for a New Functional Type of Underwater Sound Absorption Coating;
新型功能性水声吸声覆盖层机理研究
Performance of Sound-Absorbing Material Based on Flow Resistivity
基于流阻率的吸声材料声学性能研究
Noise Reduction for Sound Barrier in Railway Passenger Dedicated Lines
铁路客运专线吸声式声屏障降噪研究
Quality Controls of Decoration Construction of Acoustic Noise Material
隔声吸声材料的装饰施工与质量控制
Computation of Acoustic Characteristics of Seawater Muffler with Waterproof and Sound Absorption Layers
内覆防水吸声层的海水消声器声学性能计算
Discussion on System of Polyurethane Underwater Anechoic Material and Research Progress in Polyurethane Anechoic Structure
聚氨酯水声吸声材料的体系探讨及其吸声结构的研究进展
The product is separated from the principle of suction by the absorption layer, a buffer layer, integrated sound insulation layer formed.
该产品采用外隔内吸的原理，由吸声层，缓冲层，隔声层综合而成。
Preparation and Research on Acoustic Charicateristics of the Sound Abosrption Material Based on Polymer Micro-Particles as Well as Computer Simulation;
高分子微粒吸声材料的制备、吸声特性及计算机仿真研究
Research on Sound Absorption and Design of Noise Barrier of Recycled Tire Composite Type;
废旧轮胎复合吸声屏障的研发及吸声特性的研究
To swallow air audibly, as in nervousness.
出声地吸气出声地吸气，如在恐惧中
His breath was perfectly noiseless.
他的呼吸是没有声息的。
statistical sound power absorption coefficient
统计声功率吸收系数