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ID:47896477
大小:55.50 KB
页数:12页
时间:2019-10-21
《吸声,消音原理以及材料》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、吸声,消音原理以及材料Sound-absorbingmaterialSound-absorbingmaterialisamaterialthatabsorbssoundenergyandreducesnoiseperformance・Itisoneofthecomponentsofultrasonographicexaminationequipmenttobeabletoabsorbtheincomingsoundabsorptionthroughitsporous,film,orresonantfunctions.Thesoundabsorptionmaterialshoul
2、dbematchedwiththeacousticcharacteristicimpedanceofthesurroundingmedium,sothatthesoundenergycanenterthesoundabsorbingmaterialwithoutreflectance,andmaketheincidentsoundabsorbingmostofthesoundenergy.directoryIntroductiontotheSoundabsorptionmechanismofFactorsthataffecttheperformanceofsoundabsorb
3、ingmaterialsMaterialselectionSoundabsorptionprincipleAbsorptioncoefficientPoroussoundabsorbingmaterialResonaneeabsorptionstruetureAsingleresonatorAbriefintroductionofsoftmaterialsSoundabsorptionmechanismofFactorsthataffecttheperformanceofsoundabsorbingmaterialsMaterialselectionSoundabsorptio
4、nprincipleAbsorptioncoefficientPoroussoundabsorbingmaterialResonanceabsorptionstructureAsingleresonatorisintroducedPinyin:xishengCAIliaoEnglish:sound-materialabsorbingmaterialintheapplicationform,usuallyadoptstheresonanceabsorbingsoundstructureorthegradienttransitionlayerstructure・Inordertoi
5、mprovetheinternalwearandtearofthematerial,itisusuallymixedinthematerialwithalargeamountofbubblestuffingorincreasedmetalmicrobeads・Inbetweentheeacharrayelementtransducerarrayacousticdecoupling,thesoundabsorptionblockonthereverseofthetransducer,liquidtransducercavityinteriorwallandartifactssil
6、encingcoverprocessing,suchastheanechoictankwallsound-absorbingcoverstructure,oftenusingsound-absorbingmaterialtoimproveacousticperformance・SoundabsorptionmechanismofSoundabsorptionmechanismisdividedinto:thesoundabsorptionmaterialfromthesurfaceOfmanytinyopenchannelmaketheacousticattenuationof
7、porousmaterials,toabsorbhighfrequencysoundwavesisgivenpriorityto,haveafibroustissueofvariousorganicorinorganicfiberanditsproductsaswellastheporousstructureoftheopengrooveplasticfoamandexpandedperliteproducts・(2)bytheresonanceeffectabsorptionofflexi
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