All Questions
Tagged with audio microphone
206
questions
0
votes
2
answers
71
views
How can I record with this old fashioned mono microphone? [closed]
I have this microphone that comes with a 3.5mm mono jack connector.
When I plug it in to my laptop or my phone it won't work, and I believe the "mono" part is the problem. What do I need to ...
- 103
3
votes
2
answers
374
views
How do you choose an audio isolation transformer for a microphone?
I found a few SE Q/A's for audio transformer characterization, but they neither address calculating the impedance match, nor consider signal loss for weak audio sources (like those from a microphone).
...
- 2,088
3
votes
2
answers
369
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What type of cap would you use to block DC on a microphone-level audio line (unbalanced)?
I need to block a DC voltage on a microphone line, and a bit of research shows that MLCC is a bad idea because they can mechanically ring from vibration.
Question:
What type(s) of capacitor could be ...
- 2,088
0
votes
2
answers
86
views
What is the maximum dBu I can send into a microphone input in this schematic?
The schematic below is from the Icom 9700 radio service manual (page 80). I would like to feed this input from a mixer board's ALT-3/4 outputs, and I want to avoid blowing the TS462 microphone preamp ...
- 2,088
0
votes
0
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22
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Audio project converting TSH-4 headset to 3.5 mm audio jack
I've been trying to connect this TSH4 headset to a 3.5 mm audio jack. The headset has kind of a weird setup, with Mono audio + and - being the top pins (I don't know which is which, but the polarity ...
0
votes
1
answer
61
views
CB style PTT Mics to USB circuit
I need to design a circuit that takes the input from 2 different CB style (4-pin) push-to-talk microphones and pipes them out to USB. CB mics I have confirmed use regular XLR balanced level output. ...
1
vote
2
answers
86
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Disabling microphone when secondary one is connected
I'd like to add a 3.5 mm female jack to this circuit so that I can add a better external microphone while keeping the internal one for convenience. What would the circuit look like?
Putting both ...
- 11
0
votes
0
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59
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Why does ESP32-LyraT-Mini V1.2 use an external ADC for the microphone when ADC is already available in Audio Codec?
Kindly refer to ES8311 audio codec datasheet and ESP32-LyraT-Mini V1.2 Schematic.. In the Lyrat mini board, an external ADC ES7243 is used to sample the audio signal from the microphone but an equally ...
0
votes
0
answers
72
views
Why does the ES8374 have 5 pins to receive input from a microphone?
I am using a ES8374 codec for an audio application. I am not able to make out how to connect my analog condenser mic (which has two pins) to the ES8374 mic pins. (Refer to pictures from the datasheet)
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1
vote
1
answer
108
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Balance Mic and Speaker for Camera Input with Ground Loop Isolation
Novice looking for some help.
I use a Cardo Bluetooth headset to communicate with friends and record the audio onto an action camera while out riding motorcycles. By trial and error I was able to come ...
- 13
0
votes
2
answers
140
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Why is voltage from sound card in audio circuit not constant?
I have a JLI2555 microphone capsule connected to a JFET Transistor that is then connected to a sound card that goes into the usb port of my laptop. The idea is that I want to record my voice using the ...
- 346
3
votes
1
answer
331
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Audio Transformer with Center Tap to XLR Cable
I would like to put an isolation transformer at the differential output of MAX4063 chip.
This transformer has a center tap. Then at secondary side, outputs will be connected to a 3-pin XLR cable.
Is ...
- 499
0
votes
1
answer
103
views
Is there a risk of a DIY pre amp damaging a microphone?
I'm looking for a preamplifier to use with an aquarian A1S hydrophone. This is an application where signal integrity is not very important and we're going to filter and do a fourier transform on the ...
0
votes
1
answer
45
views
Headphone amplifier for Camera without audio jack
I am thinking about a project for my camera.
A problem that often occurs with cameras and I haven't found a solution yet is, that there is an external microphone input but no audio output to monitor ...
0
votes
0
answers
75
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Convert a 5 pin Elno connector to a 3 pin XLR
I'm trying to modify a Elno laryngophone's connector (5 pin) to plug like a normal mic so I need to understand how to wire cable to a standard XLR connector, maybe somebody knows how to do? thank you
