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Reducing audio "buzz" in GSM cell phones - EDN
https://www.edn.com/reducing-audio-buzz-in-gsm-cell-phones/
Reducing audio “buzz” in GSM cell phones. Mobile-phone designers who build to the GSM standard must sufficiently reduce audio “buzz” so that it is inaudible to users. GSM cell phones use a TDMA (time-division multiple-access) time-slot sharing technique that results in high-power RF in the 800/900- or 1800/1900-MHz bands.
EETimes - Minimize GSM buzz noise in mobile phones
https://www.eetimes.com/minimize-gsm-buzz-noise-in-mobile-phones/
Move the phone a greater distance from the speakerphone and the problem is reduced. Another similar situation can be observed when placing a GSM handset near an AM or even FM radio. This objectionable repeated humming sound is often referred to by handset design engineers as 'GSM Buzz'.
Reduce The "Buzz" In Cellular Phones | Electronic Design
https://www.electronicdesign.com/technologies/displays/article/21760517/reduce-the-buzz-in-cellular-phones
In TDMA and GSM cell phones, the most notorious voltage-supply noise comes from the RF stage switching on and off. The GSM phone switches on and off at a rate of 217 Hz.
(PDF) Real-time Bayesian GSM buzz removal
https://www.researchgate.net/publication/252910936_Real-time_Bayesian_GSM_buzz_removal
Reducing Cell-phone transmission power, changing the trans-mission protocol, equipping a telecoil [5], as well as shielding the. ... B. Poole, “Reducing audio "buzz" in GSM cell phones, ...
noise - Why does GSM cause speakers to buzz? - Electrical ...
https://electronics.stackexchange.com/questions/32830/why-does-gsm-cause-speakers-to-buzz
Show activity on this post. The buzzing is AM detected signal. The reason of audio amplifiers being hit by GSM signal is that contemporary audio semiconductor parts are actually very functional up to high GHz range. For GSM-800-900MHz range any 80mm copper trace works like 1/4 wave antenna, or stripline resonator.
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