Ribbon Mic Material

[abbey road d enfer]

My "For a 20-18.000 Hz capable motor you need a 1 - 1.5 microns aluminium..." statement remains true:

You're the one who mentioned math (in post #22). Had you said your assertion was the result of experimentation (hopefully with some documentation), this thread would have taken a better turn.

 

[Biula]

The evidence come from comparisons and experiments: "the math first and the ears next".

Seems pretty clear English, to me...

 

[abbey road d enfer]

I'm not questioning semantics. Experimentation is not math.

 

[Whoops]

I'm confused...

Anyway I still have yet to see, listen or use any Ribbon Mic that goes to 18khz.

 

[Barry Hufker]

"...that goes to 18kHz." I'm not trying to pick at your statement, just want to understand it a little better. Do you mean:
1. Extends to 18kHz at all
2. Extends to 18kHz +- 2dB
3. Extends to 18kHz +- 5db
4. ?
The reason I ask is because I want to know if you are familiar with Samar Audio Designs' MF65 which claims "Frequency Response: 20Hz-25KHz (and beyond)" https://samaraudiodesign.com/MF65.html. Knowing this claim, does it meet your definition of "extends to 18kHz?" If it does meet your criteria, how does this affect your present view? If it does not meet your criteria, please elaborate.

Thank you for your understanding and patience.

 

[Biula]

I'm confused...

Anyway I still have yet to see, listen or use any Ribbon Mic that goes to 18khz.

Well, many modern models go well above 18 kHz +-3dB, including some of mine... typically, you can achieve a 20-20.000 figure using neodymium magnets, wisely designed motor for a short front-to back path, AND a thin enough ribbon.
About the Samar design, the "culprit" of their performance is here: "For an unprecedented top end and balanced frequency response, the company’s owner and chief engineer, Dr. Mark Fouxman, has created one of the most advanced motors with the shortest front-to-back path ever seen in a ribbon microphone."

But if you ask directly to him, Marik can answer your doubt.

 

[Biula]

I'm not questioning semantics. Experimentation is not math.

math first (project phase), ears next (evaluation phase). Is that simple, you need both.

 

[ttttt]

The frequency response is a function of the front to back path distance. BBC Engineering Training Manual-Microphones (Robertson) PDF page 125 Here is a link to the BBC Monograph as well.

Thank you so much for posting these! I have a few days off so it is a perfect time to read them.