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Introduction: An Indispensable Sefer
One of the most intriguing contemporary halachic discussions is the many and varied ramifications of the International Dateline (IDL). Many sefarim and articles have been written on this beautiful topic. Therefore, I was hardly surprised when TABC talmid Aidan Samet told me that his uncle, who serves as a rav in Yerushalayim, recently released a sefer on this topic. However, when leafing through the set that Aidan and his parents gifted me of Rav Mordechai Kuber’s three-volume collection titled “Crossing the Dateline,” I very quickly realized that this is not just a sefer on the IDL. It is the Sefer on the IDL. Moreover, the author is not merely a rav in Yerushalayim but is an exceedingly talented posek whose word carries considerable weight.
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By Rabbi Haim Jachter | January 21, 2021
Modern authorities have vigorously debated whether a sound heard through a microphone, hearing aid (which functions much like a microphone), or telephone shares the status of the original sound. This issue impacts the fulfillment of numerous mitzvot, such as listening to the blowing of a shofar or to Torah and Megilla readings, by hearing them through these electronic media. Rav Ovadia Yosef (Teshuvot Yechave Da’at 3:96) strongly endorses the stringent opinion.
How Does a Microphone Work?
Before addressing the halachic aspects of electronic devices, Rav Shlomo Zalman Auerbach (Teshuvot Minchat Shlomo 1:9) describes the workings of a microphone in great detail. It receives sound waves (the original voice or sound) and converts them into electronic signals. An amplifier/speaker system then reconverts the electronic signals into an amplified replica of the original sound. A similar operation takes place within hearing aids and
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