A sound that is 10*10*10*10 or 10000 times more intense (1*10-8 W/m2) is assigned a sound level of 40 db. Observe that this scale is based on powers of 10. If one sound is 10x times more intense than another sound, then it has a sound level that is 10*x more decibels than the less intense sound.
What is the difference between foraminal stenosis and spinal stenosis? Foraminal stenosis is a narrowing of the opening in the sides of the vertebrae where the individual spinal nerves exit the spinal canal and go out into the arms and legs. Spinal stenosis refers to narrowing of the central spinal canal where all the nerves and spinal cord run through.
1 Thecal sac refers to the the sac which is a membrane (called dura mater) that contains the spinal cord and cerebrospinal fluid. 2  All this statement implies is that the disc bulge is contacting the membrane that contains the spinal cord.  3 minimal narrowing of the neuro foramina - probably you meant neural foramina. At each level in the spine where there is a disc, right and left nerve roots come out to innervate tissues in the body. 2  The holes that they come out are called neural foramina. 3  This statement means that the size, or diameter, of those holes has been minimally narrowed by this diffuse disc bulge.