I know [almost] all you need to know about noisy timber floors

I have had a horrible 12 month battle with the wealthy “designer couple” who moved in above me.  I am living on a small fixed income and have owned my unit for many years.  I have learned a lot in the last year and plan to send Jimmy a summary of what I hope will prove to be my successful strategies so others can use my hard earned knowledge.  In my application to the CTTT  I need a source that gives a noise rating of carpet with an underlay as an Lntw score.

The only source I can find is a terrific table quoted by Jimmy in an article he wrote and referred to often by other writers. [You can easily google this table in Jimmy’s article.] This is the title.

Table 1

Typical Performance of Floor Systems and Recommended Citeria

In order to use this table I need to be able to give a footnoted reference of who the author is.  Can anyone help me please with either the source and author of this table  or another reference that I could use,or suggest an Acoustic Engineer who I could consult.

Joanna