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2. Electret microphone - Wikipedia

   en.wikipedia.org/wiki/Electret_microphone

   An electret microphone is a microphone whose diaphragm forms a capacitor (historically-termed a condenser) that incorporates an electret. The electret's permanent electric dipole provides a constant charge Q on the capacitor.

3. Walmart's early Presidents' Day deals are here: Save on ... - AOL

   www.aol.com/lifestyle/walmarts-early-presidents...

   Some top deals we've spotted already are on hot items like Keurig K-Express Single Serve that's on sale for just $35 right now (but only in the red color) and a 65-inch TV for under $330. We also ...

4. Walmart's Presidents' Day deals are here — recliners under ...

   www.aol.com/lifestyle/walmarts-presidents-day...

   Walmart's Presidents' Day sales are here. Save on Dyson vacuums, Apple AirPods, sheet sets, mattresses, and more. Walmart's Presidents' Day deals are here — recliners under $300, 50% off Dyson ...

5. The best Walmart deals of the week: Half-off Dyson vacuums ...

   www.aol.com/lifestyle/the-best-walmart-deals-of...

   A power bank can be a lifesaver for a busy person. Use it to charge phones, tablets, e-readers, headphones and much more. This one by Anker has over 20,000mAh power reserve and provides over four ...

6. Microphone - Wikipedia

   en.wikipedia.org/wiki/Microphone

   First patent on foil electret microphone by G. M. Sessler et al. (pages 1 to 3) An electret microphone is a type of condenser microphone invented by Gerhard Sessler and Jim West at Bell laboratories in 1962. [24] The externally applied charge used for a conventional condenser microphone is replaced by a permanent charge in an electret material.

7. Electret - Wikipedia

   en.wikipedia.org/wiki/Electret

   An electret (formed as a portmanteau of electr-from "electricity" and -et from "magnet") is a dielectric material that has a quasi-permanent electrical polarisation.An electret has internal and external electric fields, and is the electrostatic equivalent of a permanent magnet.

8. Walmart's Deals for Days 2022 starts soon - AOL

   www.aol.com/news/walmarts-deals-days-2022-starts...

   To maximize savings during Walmart’s Black Friday sale, you can also consider the retailer’s two co-branded credit cards in partnership with Capital One, both of which offer up to 5% back on ...

9. Gerhard M. Sessler - Wikipedia

   en.wikipedia.org/wiki/Gerhard_M._Sessler

   Gerhard M. Sessler (born 15 February 1931 in Rosenfeld, Baden-Württemberg, Germany) [1] is a German inventor and scientist. He is Professor emeritus at the Department of Electrical Engineering and Information Technology of the Technische Universität Darmstadt.