Talk:Electret microphone

Timing?

How can electret microphones be around since the 1920s if they were invented in 1962? — Omegatron 14:48, 6 September 2006 (UTC)

It looks like the article is saying that the materials/ideas have been around since the 1920s, but they weren't implemented successfully until 1962. Joe056 18:44, 10 August 2007 (UTC)

Electret materials were known about in the 1920s and their use in microphones had been suggested, but it wasn't until 1962 that anybody was able to make a practical microphone that used them.Elekas (talk) 05:23, 20 November 2007 (UTC)

Reconcile with Electret Article

This page needs to be reconciled with the electret article. Basically, all of paragraphs 2 thru 4 are about electrets, and really should be in that article (to which this article should refer). 204.4.13.72 (talk) 02:59, 13 November 2008 (UTC)

help please?

hello, does anyone know how large average ones are, like the ones pictured? the article doesn't mention anything about their size.

thank you Ostrich11 (talk) 08:31, 6 February 2009 (UTC)

There needs to be a section that describes the loss of electret polarizing voltage over time. I have some electret microphones from the early 70's and their sensitivity has decreased significantly. This deterioration is not happening in real condensor microphones. Any comments?

Front Electret?

Front electrets are mentioned in a few documents, such as US patent 7292696 and in http://www.digikey.com/Web%20Export/Supplier%20Content/PUI_668/PDF/PUI_ElectretCondenserMicrophone%20Basics.pdf . But how many actually exist? I don't recall seeing any. This one: http://www.algoodwell.com/cgi-bin/ngen_details.pl?UCODE=250685&LANG=&LOOP=PROD is supposedly a "front electret", but how do we know it is this new structure, rather than the manufacturer using "front electric" to denote it is not a "back electret"? Robin Whittle (talk) 13:13, 17 September 2009 (UTC)

Plug-in power

Electret mics with plug-in power are unfortunately not addressed in this article. Please update! Thanks, Maikel (talk) 13:45, 11 November 2012 (UTC) I think 'Plug In Power' was (1990's?) just a Sony term for a conventional electret microphone to plug into their cassette tape recorders - ie requiring +2-3 volts down the signal lead to power the FET. 109.144.24.124 (talk) 18:26, 12 April 2021 (UTC)

How do they compare?

I'd like to see a comparison to other microphone types. Sensitivity, frequency response, power requirements, preferred applications; feel free to include information about general microphone construction for context. Thanks 75.110.106.45 (talk) 17:33, 5 October 2015 (UTC)

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Is this a copyvio?

I posted a negative review of a company on TrustPilot and the reply seems to have text copied from this article without attribution. I noticed as I had been reading teh same article trying to work out if it was an electret microphone. https://uk.trustpilot.com/reviews/5a54a05fa5b3290dec39a201?utm_swu=8205 I am sure they were just in a hurry and didn't have time to quote the source correctly but I believe sometimes this can cause problems as someone might think we copied it from them. Is there anything needs to be done here, or am I just like a Dutch boy with his finger in the dyke unable to stem the flood?Billlion (talk) 16:22, 10 January 2018 (UTC)

Early Electret Microphones

During World War II the Japanese used carnuba wax in a back electret microphone for many of their small radio transmitters. As these fed vacuum tube amplifiers the high impedance was not an issue.

Carnuba wax is charged as an electret by placing it in a high voltage field while it transitions from liquid to solid. 2600:1016:B003:2BBB:783F:F950:1B24:4B5C (talk) 11:26, 5 December 2022 (UTC)