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May one be yotzai listening to havdala over the telephone?

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related –  zaq Sep 20 '11 at 13:28
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Most Poskim say that if another option exists, a telephone should not be used to fulfill the mitzvah of Havdalah. Rather a woman who is home alone and has no one to make Havdalah for her, should recite it herself (Mishnah Berurah 296:35 - Aruch HaShulchan 296:5) rather than listen to it over the telephone. Even if the lady can not drink wine, grape juice, or beer, it is better for her to recite Havdalah over coffee (Shmiras Shabbos K'hilchasah 60 note 18) tea or milk alone (Aruch ha-Shulchan 272:14; Igros Moshe O.C. 2:75). According to some poskim (Tzitz Eliezer 8:16; Shemiras Shabbos K'hilchasah 60:5), it is preferable to drink grapefruit, orange or apple juice rather than to listen to Havdalah recited over the phone.

If you are in a situation where you cannot recite Havdalah (in a hospital), and there is no one who can come until Tuesday evening (Orach Chaim 291.6) to make Havdalah for him, he may have to rely on the poskim who permit listening over the telephone(Igros Moshe O.C. 4:91-4; Tzitz Eliezer 8:11). But in a situation where someone could come and recite Havdalah for him before Tuesday evening, the correct procedure is to wait until then for Havdalah to be recited.

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The Lubavitcher Rebbe wrote (with regards to Megilla, Shofar, and Gittin) that in contrast to an acoustic hearing aide whose amplified sound is connected to the original sound, a sound produced through a microphone (or telephone) has no halachic connection to the original sound.

A microphone (or telephone) works by a voice changing the electric current which produces a sound at the other end. Halachicaly, this would be just like computer-generated words, which one could not be yotzei with. The Rebbe pointed out that many of the poskim who ruled otherwise were misinformed as to the inherent nature of electricity.

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I'm not sure I understand -- R. Moshe (who permitted it, see Igros Moshe OH 2:108, as well as the one cited above) was surely not misinformed as to the nature of the microphones, and he writes explicitly that the experts say that the voice produced by the microphone is a "different voice" but that he says that even if it is, it doesn't matter, since even in a normal case, the air is vibrating to carry the sound, so it's not like there is a real "authentic" voice in any case. –  Curiouser Sep 20 '11 at 19:50
    
@curiouser What would be the difference between a microphone, tape-recorder, or computer-generated-sounds? –  Shmuel Brin Sep 20 '11 at 19:56
    
A microphone transmits sounds that are being created by a "bar chiyuva" human in (almost) real time. The delay with the electricity is not really noticeable -- no more than the delay of sound waves traveling through the air. In the other cases your cited, you lack either the bar chiyuv (in the computer case) or the real-time (in the tape-recorder case). –  Curiouser Sep 20 '11 at 20:03
    
Why can't you be Yotzei with computer-generate words? –  Double AA May 15 at 20:34
    
@DoubleAA because the computer isn't a baar chiuyva –  Shmuel Brin May 15 at 21:34
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It should be no different than any other halachah where you have to hear something. You can't be yotzei by hearing shofar, or megillah, or the like over the phone (will have to find the source for this), because you're not hearing the original sound but a re-creation of it from electrical signals; the same presumably applies to havdalah.

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