Questions tagged [microphone]

A sensor converting an acoustic signal into an electric one.

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2answers
2k views

How can extend the cable distance from a condenser microphone to the ADC without loosing fidelity?

I am new here so please forgive me for a vey basic question. I have a TASCAM iM2 in my possession. This is a stereo condenser microphone coupled to an ADC that connects to the the latest iPhone models ...
2
votes
1answer
962 views

How to use a DKO48 telephone microphone?

I have an old telephone made in the sixties (FF-OB/ZB or FF53). Now, I was planning to make an external speaker for that telephone, but I failed miserably, so I've put that aside. Now, the handset ...
7
votes
5answers
24k views

Do electret condenser microphones require phantom power?

I was under the assumption that electret microphone capsules do not require any phantom power an can be connected in the same way dynamic microphone capsules can be, due to the fact that they contain ...
1
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1answer
354 views

Adding microphone/amplifier to Gumstix Overo Earth COM?

I am new to hardware hacking in general. I have a Gumsitx Overo Earth COM and a Palo35 expansion board with audio in/audio out capabilities. According to Gumstix's wikipage on audio input, the ...
0
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3answers
1k views

Any way to identify “directionality” of electret microphones?

Picked up a handful of electret microphones from a local component store, and store owner claims them to be generic. He calls all components generic for which there is no data-sheet or specific part ...
3
votes
1answer
444 views

Good way to pick up voices in a small room for speech recognition

I've written an app that's pseudo-intelligent and responds to voice commands. I'd like it to be able to pick up my speech from anywhere (initially just one room, but possibly many later on). At ...
1
vote
1answer
300 views

How is it possible to feed the output signal back to input using a TRRS connector

I want to be able to "play" the output signal back to the device (in my case an XPERIA X10 which i think uses a standard TRRS plug) so that everything that is output by the device comes back to it. ...
2
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2answers
2k views

Ultra High sensitive sound capturing sensors

We are working on a project which involves in capturing signals traveling through a rail line. Unfortunately in our country, we have lots of joint in between rail tracks. So the signal gets attenuated ...
6
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3answers
2k views

Does this amplifier work with 5V?

I'm using an Arduino to read an analog signal from an electret microphone. Here is the circuit: But I will be powering it with 5V from the Arduino, So would this work okay? Thanks!
3
votes
1answer
4k views

Is there any way to feed a signal (line-in) into a mobile phone?

My first post here, so please point out if I say anything silly. I'm working on an audio application for mobile phones. At this point in time I'm trying to measure audio latency of a mobile device by ...
1
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3answers
3k views

Broken headset, repaired, but microphone doesn't work on computer, does work on phone

I have a headset for my desktop computer. It's an analog device with two 3.5mm jacks, one for the headset, one for the microphone. It also has inline volume and microphone toggling. By wire was ...
1
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1answer
483 views

Do it yourself: baby call monitor [closed]

This is kind of a hobby project (I'm an informatics professional but I always was fascinated by electronics). I want to build a baby call (basically, a one way intercom); to simplify the electronics (...
6
votes
5answers
13k views

Oscilloscope using laptop microphone input…is that possible?

Its possible to have an oscilloscope from the input of the sound card? I'm trying to log the states of a PIC32 pin (min: 0V, máx: 3.6). Is it possible to put that value on a 3.5" jack and, on the pc, ...
12
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3answers
36k views

How to make a clean amplified microphone analog to digital conversion?

I've asked a couple of questions relating to this project the past couple of days, but I cant seem to put it all together. I hooked up an electret mic into an opamp and gave output to my arduino ...
3
votes
1answer
1k views

What is the voltage range on an Arduino pin when doing analogRead()?

I know what an Arduino's ADC generates a number with 10 bits of resolution (0 to 1023). How is this number generated? Is there a minimum and maximum voltage it will assign 0 and 1023 to, respectively? ...
4
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4answers
8k views

Why is microphone + opAmp + Arduino circuit not working?

I followed the mic + op-Amp part of this schematic exactly using an Lm386 chip: https://randomskk.net/projects/lightstrip/schematic.pdf and sent the output from the op-amp into a pin on an Arduino ...
1
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3answers
766 views

Emulating an electret microphone with a DAC circuit

Good day, I'm currently getting into DIY electronics and Netduino programming and there's this one personal project that I want to do but I'm hesitant because of lack of information. Basically this ...
3
votes
3answers
3k views

Huge drop in voltage when connecting output to pin of microcontroller?

I have an electret microphone pre amplifier and peak detector circuit that's working great. The microphone picks up sounds and I get a steady DC voltage that, depending on the volume of the sound the ...
5
votes
2answers
7k views

How do you tell the difference between speakers and microphones?

How do you tell the difference between speakers and microphones? I pulled the following two components out of an old cell phone and cannot tell them apart. Each have two metal contacts on the back.
0
votes
1answer
1k views

Arduino + Microphone how to grab values?

I have a simple microphone. How can I send some "volume" or "oscillation" values via serial to the computer? I built a simple preamp but it does not respond, any hints?
7
votes
2answers
7k views

Amplifying sound from a microphone

I have a small piezoelectric ultrasonic microphone (receiving signals of around 40 kHz). But the voltages it generates are too small to be read by my micro-controller's ADC. So I want to amplify the ...