<<In Joni's case I do think she's referring to the silence of a vacuum.>>
Seems obvious after I've seen your explanation, Mark! I found some photographs of a Bell Jar and it looks like it's used in science experiments involving air pressure. Thanks for the help! I guess Joni uses the term instead of "vacuum" to avoid using a cliche. More of Kratzman's influence... Bob NP: Shawn Colvin, "Sunny Came Home"
