Micròfon electret (Catalan Wikipedia)

Analysis of information sources in references of the Wikipedia article "Micròfon electret" in Catalan language version.

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bell-labs.com

Juang, Lynn. «Foil Electret Microphone: Sessler & West (1960)». Bell Labs, Multimedia Communications Research Laboratory. Arxivat de l'original el February 4, 2012. [Consulta: 19 gener 2009].

«Patent US3118979: Electrostatic transducer». www.freepatentsonline.com. United States Patent Office. [Consulta: 12 abril 2016].

Juang, Lynn. «Foil Electret Microphone: Sessler & West (1960)». Bell Labs, Multimedia Communications Research Laboratory. Arxivat de l'original el February 4, 2012. [Consulta: 19 gener 2009].