@audiotroy You answered a different question than the one I asked. I asked about how a consumer could measure the existing noise on their home line and you posted that you had tested many conditioners and have dedicated lines.
You cited me in your post and then posted something tangential -- which also helps you sell power conditioners. My question asks how one can test if they need to buy anything at all.
To put it another way, your post adds "noise" to this conversation.