Many thanks for your replies and your interest in this topic.?
Because of the discovery of Johan (I don't perceive the typical hole in the middle…) I would like to follow up a little.
I think it's a better choice to listen to wise men and to leave the HM-200 alone for now. Instead, I will focus on building new microphones and take inspiration from vintage mic building designs. But I agree to kennjava also. To install new Primos or PUI electrets would be an interesting trial.
Regarding binaural recording I found an interesting article. Source: ResearchGate
(some pictures from the archives look really funny… lol :-)?
I thought binaural technology is a very modern technology, but that is obviously not the case.?The HM-200E binaural headphone-microphone combination and its inventors are mentioned in the article.
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I've added a photo of the HM-200 so you can easily see how the capsules are positioned. It’s at a right angle to the sound-reflecting surface of the indicated auricle.
@Johan
When I find one, I'll let you know. The following article about may be of interest to you.
@andrzej
Many thanks! I always try to find a place where there is no wind.?When I recorded the ducks, I may have been lucky that I didn't use microphones with a higher SNR. I'm sure that significantly more background noise would have been recorded.
Thank you and sorry for the late reply!
Heinz
