How exactly do speakers make a noise when a mobile phone, that’s about to receive a text message, is right next to it? 944 viewsJanuary 3, 2024 Question90.51K May 10, 2022 0 Comments How exactly do speakers make a noise when a mobile phone, that’s about to receive a text message, is right next to it? In: 0 4 Answers ActiveNewestOldest Anonymous Posted May 10, 2022 0 Comments The radio frequencies on which cellphones operate are near a harmonic of the speaker’s coil. The RF energy excites the coil, inducing a small current which creates just enough of an electromagnetic field to cause the speaker cone to move a little. You are viewing 1 out of 4 answers, click here to view all answers. Register or Login
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