Hearing Aids on Shabbat, Yes – But All Varieties of Microphone Technologies, No?
Quote from: https://www.zomet.org.il/eng/?CategoryID=198&ArticleID=283#b5 6. Hearing Aids Contemporary poskim have permitted the use of hearing aids (which are actually small microphones and amplifiers) on Shabbat, and were seemingly unconcerned with the problem of electricity. The Tzitz Eliezer (vol. 6, 6:6) summarizes: … Continued