Megillah via Electronic Transmission: Voice or Mimicry?
Insights from Shulchan Menachem, Volume 3, Siman 8
In a fascinating intersection of Halacha and modern science, the Rebbe addresses the question of whether one can fulfill the obligation to hear the Megillah through a telephone, radio, or other electronic means. While this was a subject of vigorous debate among the previous generation of scholars, the Rebbe provides a definitive ruling that serves as a cornerstone for Chabad practice.
The Debate of "Sha’as Ha-De-Chak"
The Rebbe mentions a correspondence with Rabbi Ephraim Yolles, a prominent scholar and close associate of the Rebbe. Initially, Rabbi Yolles suggested that in a Sha’as Ha-De-Chak (a situation of extreme necessity)—such as for a person bedridden in a hospital with no other way to hear the reading—it might be permissible to rely on a telephone reading.
However, upon receiving the Rebbe’s detailed scientific and halachic response, Rabbi Yolles retracted his position. The Rebbe clarified that the issue wasn't merely one of "circumstance," but a fundamental change in the essence of what is being heard.
The Technical Reality: Electricity vs. Air
The Rebbe’s primary objection is based on a precise understanding of how telecommunication works. When a person speaks into a phone or microphone, their physical voice does not "travel" through the wire. Instead:
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The sound waves hit a diaphragm (made of metal, plastic, or similar materials).
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The voice is converted into a stream of electrical impulses.
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These impulses travel to the destination, where they cause a second diaphragm to vibrate, creating a reproduction of the sound.
The Rebbe argues that the sound heard at the other end is not a "voice" (Kol) at all, but rather the sound of vibrating metal or plastic. Unlike an echo (which is a reflection of the original sound waves), electronic sound is a completely new creation born of electricity.
The Halachic Existence of Air
The Rebbe draws an ingenious comparison to the laws of Shabbos. In Halacha, air is recognized as a tangible medium with specific properties. For example, one is not allowed to completely cover a lit lamp on Shabbos because doing so cuts off the oxygen, causing the fire to extinguish—a violation of the Sabbath.
Similarly, the mitzvah of Megillah requires hearing a human voice traveling through the air. When the voice is converted into electricity, it loses its "halachic existence" as human speech. To suggest that a person fulfills a Biblical or Rabbinic mandate through a "power of a power" (koach kocho)—where the human only initiates a mechanical process—is, in the Rebbe’s view, too far removed from the requirement of hearing a direct human voice.
Conclusion: Scientific Accuracy in Halacha
The Rebbe suggests that earlier authorities who were lenient on this issue likely based their rulings on a flawed description of the technology. They may have been led to believe that the telephone merely "carried" the original voice, rather than reconstructing it.
The ruling remains clear: even in difficult circumstances, one must hear the Megillah read directly by another person. Electronic mimicry, no matter how clear, cannot serve as a substitute for the human element required by the Torah.