I am currently working on a digital measurement tool school project.
Which will utilize a microphone to pick up a signal (chirps, PRN etc) and fed it into an ADC of a MCU for further processing.
I'm using the following mic: ATR3350 Omnidirectional Condenser Lavalier Microphone || Audio-Technica US
From initial testing (with out a pre-amp), I noticed that the signal picked up by the mic is mostly Noise + the actual signal (weak).
So, I am looking to build a front-end for my mic to eliminate noise and bring the desired signal up to line level. I have come across various audio op amps, some even being "Ultralow noise".
These are the pre-amps ICs that I am currently looking at:
-LT1115
-NE5534
-SSM2017
-SSM2019
-INA217
Please leave your suggestion on which IC I should be using and/or circuits examples (e.g. spec sheets) that I can take a look at for a starting point.
Which will utilize a microphone to pick up a signal (chirps, PRN etc) and fed it into an ADC of a MCU for further processing.
I'm using the following mic: ATR3350 Omnidirectional Condenser Lavalier Microphone || Audio-Technica US
From initial testing (with out a pre-amp), I noticed that the signal picked up by the mic is mostly Noise + the actual signal (weak).
So, I am looking to build a front-end for my mic to eliminate noise and bring the desired signal up to line level. I have come across various audio op amps, some even being "Ultralow noise".
These are the pre-amps ICs that I am currently looking at:
-LT1115
-NE5534
-SSM2017
-SSM2019
-INA217
Please leave your suggestion on which IC I should be using and/or circuits examples (e.g. spec sheets) that I can take a look at for a starting point.
Well, modified WM-61a capsule mics like the one Linkwitz shows here are generally well received and have very good levels of performance for speaker measurements.
But whether that is relevant to what you want to do I'm not sure.
What type of recording interface are you using?
This may fit the bill: https://www.parts-express.com/dayton-audio-emm-6-electret-measurement-microphone--390-801
(but I haven't used it)
But whether that is relevant to what you want to do I'm not sure.
What type of recording interface are you using?
This may fit the bill: https://www.parts-express.com/dayton-audio-emm-6-electret-measurement-microphone--390-801
(but I haven't used it)
JLI Electronics has an exact replacement for the Panasonic WM 61A. It is known as JLI-61A. The website is www.jlielectronics.com. They are located in Pennsylvania.
Recently bought two myself.
Recently bought two myself.
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