hi！

[laotao]

My major is condenser diaphragm production process and the tube circuit design，very glad to have the chance to meet with you ，I’d like to visit some websites, Forum and bbs（Europe and America） related with microphone. could you tell me? Thank you very much!

 

[mixsit]

Welcome
http://recforums.prosoundweb.com/index.php/f/33/6263/
This one comes to mind.

 

[noisedude]

There are some people here who know about microphone design, you could try Gearslutz too.

Make sure you talk to Mshilarious while you're here, he makes microphones.

 

[kojdogg]

Search for relevant posts by Michael Joly, Gus, Marik and Philgood too

There's also good info in this sticky thread:
https://homerecording.com/bbs/showthread.php?t=27030

 

[mixsit]

Search for relevant posts by Michael Joly, Gus, Marik and Philgood too

There's also good info in this sticky thread:
https://homerecording.com/bbs/showthread.php?t=27030

Now that's the one.

 

[laotao]

Thank you upstairs several

 

[Weasel9992]

Thank you upstairs several

You're welcome...upstairs several(ly?).

Frank

 

[PhilGood]

So, you build your own capsules or design them?

You know tube circuit designs?

You should fit in here very well. Tell us more about your experience.

Some good boards to post on would be gearslutz.com or Klause Heyne's mic forum. Follow the rules, though. You could also join Yahoo's Mic Builder forum/list.

P

 

[laotao]

So, you build your own capsules or design them?

You know tube circuit designs?

You should fit in here very well. Tell us more about your experience.

Some good boards to post on would be gearslutz.com or Klause Heyne's mic forum. Follow the rules, though. You could also join Yahoo's Mic Builder forum/list.

P

Yes ,My design work includes:
1)1.4 inches in diameter Large Diaphragm.
2)How to control uneven frequency response (not by means of circuit EQ).
3)focus on the internal electric field of discharge phenomena and avoid it.

 

[antichef]

sounds very interesting! If you have any published material, I'd love to see it.

 

[PhilGood]

You should probably hook up over at the Prodigy Pro Forum.

Two guys for sure who make capsules over there. Tim Campbell and Dale Ulan.

 

[Marik]

Yes ,My design work includes:
1)1.4 inches in diameter Large Diaphragm.

Is it an effective area, or overall diameter?

2)How to control uneven frequency response (not by means of circuit EQ).

Is the capsule a center or edge terminated? With edge terminated and that diameter most likely you will get quite complicated and uncontrolled series of resonance modes.
The cardioid capsule is a resistance controlled system, meaning, it has a resonance peak (usually up to 60db) as a function of diaphragm tuning. FOr the flat response the peak later effectively damped. The linearity response is controlled by the damping properties of the backplate, which has series of holes (or grooves) to determine its acoustical impedance.
For pressure gradient capsules (cardioid, or fig.8), we also need an acoustical labyrinth (or time delay) circuit, which controls the polar pattern. The time delay and damping circuit affect the capsule response simultaneously, so the very carefull adjustment of all the dimentions is crucial.

3)focus on the internal electric field of discharge phenomena and avoid it.

Sorry, it is not clear enough what you mean by "internal electric field of discharge phenomena".

Best, M

 

[laotao]

Is it an effective area, or overall diameter?



Is the capsule a center or edge terminated? With edge terminated and that diameter most likely you will get quite complicated and uncontrolled series of resonance modes.
The cardioid capsule is a resistance controlled system, meaning, it has a resonance peak (usually up to 60db) as a function of diaphragm tuning. FOr the flat response the peak later effectively damped. The linearity response is controlled by the damping properties of the backplate, which has series of holes (or grooves) to determine its acoustical impedance.
For pressure gradient capsules (cardioid, or fig.8), we also need an acoustical labyrinth (or time delay) circuit, which controls the polar pattern. The time delay and damping circuit affect the capsule response simultaneously, so the very carefull adjustment of all the dimentions is crucial.



Sorry, it is not clear enough what you mean by "internal electric field of discharge phenomena".

Best, M

you are right !

I try to stress "internal electric field discharge phenomena":

A long –term problem which pyzzled the sound-engineer is that when the wether is moist, a particular mic noise(similar to boiling water ) would be heard .it is generally called:capsule electric discharged .

In order to avoid this terrible noise, we insist that condenser microphone should be placed in a dried box , this is practical ，but is limited after all, because we can not specifically choose the dry weather to do recording

More terrible is: Once the discharge path formed, although you are very careful, deterioration sounds always accompanied with you from start to finish

 

[antichef]

pyzzled is my new favorite word

just echoing Marik (all I can do on these discussions) - center or edge terminated?

 

[laotao]

pyzzled is my new favorite word

just echoing Marik (all I can do on these discussions) - center or edge terminated?

pyzzled？？puzzled！ sorry！my mistake

In my opinion, the capsule is edge terminated , the effective diameter should be about 30 mm

I feel the cardiod capsule include a lot of acoustic parameter which influence with the frequency response ,but the most important is how to adjust these parameters through a simple method to achieve optimization .

On the other words ,backplate and front diaphragm sometimes may swap roles（in different wavelength）

generally，the front curve ：

32Hz-18500Hz Less than 3 dB