im building a binaural mic with my son.
Parts are mainly 3d printed ears and acoustic dividers an usb soundcard with stereo mic inputs and two cheap electret lavalier mics (electret capsules).
For a first test i resoldered the two microphone cables to a stereo jack and tested them with the usb soundcard. They work well, only problem is an about 9db volume difference between them.
I dont want to replace them with higher quality electrets in the first tests so what would be the best option to match them? can i use an l-pad on the louder one? or is there a trick to have higher gains on the lower volume one?
Recommened resistor values?
im asking because im not sure what happens when i add like an l-pad and that of course changes the support voltage too
.
Parts are mainly 3d printed ears and acoustic dividers an usb soundcard with stereo mic inputs and two cheap electret lavalier mics (electret capsules).
For a first test i resoldered the two microphone cables to a stereo jack and tested them with the usb soundcard. They work well, only problem is an about 9db volume difference between them.
I dont want to replace them with higher quality electrets in the first tests so what would be the best option to match them? can i use an l-pad on the louder one? or is there a trick to have higher gains on the lower volume one?
Recommened resistor values?
im asking because im not sure what happens when i add like an l-pad and that of course changes the support voltage too
.
Wow, that’s a major difference. To me that says there is a problem. I’ve built about 20 of the things and thru the most of the response they are rarely over 1 dB apart. Usually closer except at the extreme top and bottom ends.
Could there be a wiring or connection problem?
Could there be a wiring or connection problem?
I swapped the capsules and the phenomen switched channel. Must be a difference in the capsule, even they look exactly the same haha. i will replace them by some wm-61a i have somewhere...
im curious. Which kind did you build?
I built a few slightly different versions of binaural mics. Some in-ear, some on earplugs, and some with over the ear hooks. They all work pretty much the same. I used wn61a capsules or mostly the PUI HD series.