When a sample stream is decimated, frequency components from outside of a desired frequency band are aliased into the desired band, causing interference and loss of information. The additional substance may be naphthalene, phenylnaphthalene, anthrance, or diphenylanthrance. The uniqueness of said structure is that it is capable of being installed directly against existing walls and ceiling with minimal clearance between existing structure and new storm room. The MPT frame comprises a data frame to hold data and header information.