Metaphorically, an echo chamber can refer to any situation in which some force or idea is amplified by transmission inside an enclosed space. For example, observers of journalism in the mass media have described the echo chamber effect: one purveyor of information will make a claim, which many like-minded people then repeat, overhear, and repeat again (often in an exaggerated or otherwise distorted form) until most people assume that some extreme variation of the story is true.

Postings by Guest, bogeyman: 3 (At least) By Guests in general (who could be bogeyman): ???

Postings by BillD: 2

I don't know either. Just wondering who is doing the whispering...?

Cheers

DtG