Possible Piezo headphone thats not Pioneer?

[Kabeer]

Translated version of http://20cheaddatebase.web.fc2.com/AZDEN/AZDENindex.html

Take a look at this article. It claims that the company Piezo, made a Piezo headphone in the 70s...at least thats what I think its saying.

 

[DefectiveAudioComponent]

Quote:

Originally Posted by Kabeer /img/forum/go_quote.gif Translated version of http://20cheaddatebase.web.fc2.com/AZDEN/AZDENindex.html Take a look at this article. It claims that the company Piezo, made a Piezo headphone in the 70s...at least thats what I think its saying.

Which headphone there do you mean?

 

[Kabeer]

Quote:

Originally Posted by DefectiveAudioComponent /img/forum/go_quote.gif Which headphone there do you mean?

I'm not sure which one....the description on the top says so. Since there are only 3 under the piezo brand, and one is an electret. Its either the DSR-7 or 8.....maybe...unless the model just isnt listed there

 

[Acix]

Do you mean that the ESR-2 have some similarity to the Pioneer SE-100?

 

[Kabeer]

Hmm well the ESR is electret....so I doubt thats it... the first paragaph or so states something about a piezo principle driver, and then shows a diagram if you click the hyperlink.

 

[DefectiveAudioComponent]

Too bad there is no information on any piezoelectric headphone there, just talk about the principle.

 

[wualta]

Before Pennwalt commercialized PVDF film, there was a long history of piezo earphones, headphones and phono cartridges using piezo crystals of Rochelle salt. That's what's in the diagram I saw.

Those earphones you see in old '50s photos of teens listening to their transistor radios are all piezos. They made dandy little microphones too.

I think you're seeing socalled crystal headphones in those photos. I await refutation.

 

[Kabeer]

Ahh, you mean those crappy old single ear earphones? Bah pointless lol.
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