声学技术
聲學技術
성학기술
Technical Acousitics
2013年
6期
495-499
,共5页
钱中昌%寇毅伟%刘碧龙%刘克
錢中昌%寇毅偉%劉碧龍%劉剋
전중창%구의위%류벽룡%류극
声强法%吸声材料%隔声量
聲彊法%吸聲材料%隔聲量
성강법%흡성재료%격성량
sound intensity method%sound absorbing material%sound reduction index
大型构件隔声量的实验室测量有两种方法:一种是传统的隔声室测量方法,可参照国家标准GB/T 19889.3-2005;另一种可称之为声强法,可参照国际标准ISO 15186-1:2000。参照以上两种方法,分别测量了三块板的隔声量。结果发现,在中高频段,两种方法测量结果几乎一致,而在低频段(300Hz以下),声强扫描法测量结果明显低于传统方法。为了找出造成低频段测量结果差异的原因,还研究了吸声材料、探头间距等因素对测量结果的影响。
大型構件隔聲量的實驗室測量有兩種方法:一種是傳統的隔聲室測量方法,可參照國傢標準GB/T 19889.3-2005;另一種可稱之為聲彊法,可參照國際標準ISO 15186-1:2000。參照以上兩種方法,分彆測量瞭三塊闆的隔聲量。結果髮現,在中高頻段,兩種方法測量結果幾乎一緻,而在低頻段(300Hz以下),聲彊掃描法測量結果明顯低于傳統方法。為瞭找齣造成低頻段測量結果差異的原因,還研究瞭吸聲材料、探頭間距等因素對測量結果的影響。
대형구건격성량적실험실측량유량충방법:일충시전통적격성실측량방법,가삼조국가표준GB/T 19889.3-2005;령일충가칭지위성강법,가삼조국제표준ISO 15186-1:2000。삼조이상량충방법,분별측량료삼괴판적격성량。결과발현,재중고빈단,량충방법측량결과궤호일치,이재저빈단(300Hz이하),성강소묘법측량결과명현저우전통방법。위료조출조성저빈단측량결과차이적원인,환연구료흡성재료、탐두간거등인소대측량결과적영향。
There are two methods for measuring the sound reduction index (SRI) of large partitions. One is a conven-tional method which requires a sound proof chamber by reference to GB/T 19889.3-2005;the other is called sound in-tensity method by reference to ISO 15186-1:2000. The SRIs of three panels are measured according to these two me-thods. The results indicate that the SRI is almost consistent with the two methods in the middle and high frequency re-gion. When the frequency is below 400 Hz, the SRI measured by sound intensity method is less than that measured by the conventional method. The effects of sound absorbing materials and the distance of spacers used in sound intensity probe are also investigated.