摘要
为研究废旧羊毛材料的吸声性能,利用非织造布的生产工艺,以废旧羊毛为主要原料,制备一种新型羊毛非织造布。通过使用传递函数法和驻波管法,对羊毛非织造布的吸声性能进行了测试,分析了在声波频率为250~6 300 Hz范围内材料厚度、密度和空腔深度对其吸声性能的影响。结果表明,羊毛非织造布吸声性能优异,对高频的吸声性能优于对低频;在中低声波频率,随材料厚度、密度和空腔深度的增加,其吸声性能越好。材料厚度和空腔深度是影响羊毛非织造材料吸声性能的主要因素;通过增加空腔深度提升材料的吸声性能,是较为经济合理的办法。
In order to study the sound absorption properties of waste wool fiber,a kind of novel wool nonwoven material was prepared by a conventional non-woven technique with waste wool fibers as the main raw material.Using the transfer-function method and standing wave tube method,the sound absorption properties of wool nonwoven materials in a frequency range of 250-6 300 Hz were studied by changing the thickness,density,and cavity depth.Results indicated that wool nonwoven materials exhibit excellent sound absorption properties,which at high frequencies are better than those at low frequencies.At the sound waves of low frequencies,with the increase of thickness,density and cavity depth,sound absorption properties improve.The thickness and cavity depth are the main factors affecting the sound absorption properties of the material.Moreover,it is an economic and reasonable way to increase the sound absorption properties of the material by enhancing the cavity depth.
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2016年第7期77-81,共5页
Journal of Textile Research
基金
教育部自主科研重点项目(JUSRP51301A)
江苏省2015年度普通高校研究生实践创新计划项目(SJZZ15_0148)
关键词
羊毛非织造布
吸声性能
厚度
密度
空腔深度
wool nonwoven material
sound absorption property
thickness
density
cavity depth
