@roger,
I'll know after Sunday, 6/29/14 about the Church situation as it's not too large but auditorium style. Couldn't hear homily. TV, phones, microwaves, computer, all reduced at least 50%. Watched ballgame last night w/o closed caption. Before, equalizer up, bass down, treble to extreme. All reset to normal - no electronic screeching. Jeep media, blue tooth, everything turned down; no feedback.
Incredible difference: ph. Messages must have been heard by neighbor in condo. Yikes.
Still new, will keep in touch. I'm so happy, happy.