几何尺寸与公差论坛------致力于产品几何量公差标准GD&T (GDT:ASME)|New GPS(ISO)研究/CAD设计/CAM加工/CMM测量

几何尺寸与公差论坛------致力于产品几何量公差标准GD&T (GDT:ASME)|New GPS(ISO)研究/CAD设计/CAM加工/CMM测量 (http://www.dimcax.com/hust/index.php)
-   产品功能分析 (http://www.dimcax.com/hust/forumdisplay.php?f=10)
-   -   sound waves calculation of pressure (http://www.dimcax.com/hust/showthread.php?t=29093)

huangyhg 2009-09-16 12:35 AM

sound waves calculation of pressure
 
sound waves & calculation of pressure
dear members ,
pl. help me to the calculation of sound pressure from a given 160 desibles.
thanks in advance.
kvram.
if the value of reference for db is
p0=20·10^-6 pa
then the equation that gives p from the level of pressure in db (=150) is
150=20·log(p/p0)
that solved gives
p=632.465 pa
or
p=6.449·10^-3 kgf/cm^2
and 160 db=3000 pa, roughly. grin
cheers
greg locock
2000 pa


所有的时间均为北京时间。 现在的时间是 12:28 AM.