gentlevoice1
Well-known member
Hello,
I'm currently in the process of evaluating various microphone options (as some of you may know) & to that end recently heard about Stephen Paul Microphones in California (thanks to Tim Campbell for this. Their website is not comprehensive but is http://www.spaudio.com/).
It is inspiring to learn that they use e.g. 0.9, 1.5 & 3.0 umeter thickness membranes 8) I have also been reading a bit (to the extent that I understand it ???) in AIP's "Handbook of Condenser Microphones" and note that a capsule's main resonance frequency depends e.g. on the tensioning of the membrane. On page 43 there's a value given of 2000N/m for a typical 1 inch microphone.
My question is what 2000N/m corresponds to in practical terms? E.g. let's say that I hang a: 1 umeter thick membrane - 10 mm wide - at the top tied to my kitchen table and drawn towards the floor with a weight at the other end: How much weight do I have to add to the bottom end of the membrane to get 2000N/m? Is there a - preferably simple - formula for calculating this?
Also, I have some 0.9 umeter membrane that I'd like to add a thin gold layer on top of so that I can use it as a membrane. Any of you have tried this and have tips on a feasible way to do it? Or maybe one of you know of a source of superb & thin (1-2 umeter) microphone membrane material (with gold)?
Thanks for reading & maybe replying
Jesper
I'm currently in the process of evaluating various microphone options (as some of you may know) & to that end recently heard about Stephen Paul Microphones in California (thanks to Tim Campbell for this. Their website is not comprehensive but is http://www.spaudio.com/).
It is inspiring to learn that they use e.g. 0.9, 1.5 & 3.0 umeter thickness membranes 8) I have also been reading a bit (to the extent that I understand it ???) in AIP's "Handbook of Condenser Microphones" and note that a capsule's main resonance frequency depends e.g. on the tensioning of the membrane. On page 43 there's a value given of 2000N/m for a typical 1 inch microphone.
My question is what 2000N/m corresponds to in practical terms? E.g. let's say that I hang a: 1 umeter thick membrane - 10 mm wide - at the top tied to my kitchen table and drawn towards the floor with a weight at the other end: How much weight do I have to add to the bottom end of the membrane to get 2000N/m? Is there a - preferably simple - formula for calculating this?
Also, I have some 0.9 umeter membrane that I'd like to add a thin gold layer on top of so that I can use it as a membrane. Any of you have tried this and have tips on a feasible way to do it? Or maybe one of you know of a source of superb & thin (1-2 umeter) microphone membrane material (with gold)?
Thanks for reading & maybe replying
Jesper