sound wave theory

I am looking for some one who can help explain Snells Law to me I am ok at sound wave theory, but for some reason am having a little problem with this.

The formula works the same for sound waves from what I have been reading. When a wave hits an object at a certain angle other than 90 degrees that angle changes when it enters that object.  And it changes depending on the acoustic impedance mismatch, frequency and the velocity between the medium of the original material and new material.

If I am way off please let me know.

It sounds like what you said, but wtih light waves.  The light hits a object that bends it's light to make the light wave change in the "glass with a straw".

Here:  http://www.ndt-ed.org/EducationResources/CommunityCollege/Ultrasonics/Physics/refractionsnells.htm

I've heard of this principle being used by scientists developing materials used to sound-proof a room.

Actualy I am a Level 3 NDT inspector at Spirit Areospace fomaly Boeing Aircraft in Wichita.  I have taken and passed  My level 3 Magnetic Particle test and Penetrant test.  I am working on my Ultrasonic level 3 test and this is one the sites I use to study.  With that being said I was looking over most of the info again on the afternoon of the 19th and it all started to click again I haven't studied it for over 10 years.  Alot of the info on that site can directly be applied to this feild.  I love both of them so it seems to work out well for me if I can remember it all.

How did you come up with this site? 

I think so.  Because of the density and elasticity of the brick it will not absorb much like ~3%.  Now reflecting it will do that do to its properties.  The two terms are fairly opposite.  I don't see how those bricks are helping you, but if they make you think it does, then it does. 

Later

Matt

That is awsome I would think that THX would be a neat place to work.