Questions tagged [microphone]

A sensor converting an acoustic signal into an electric one.

42 questions with no upvoted or accepted answers
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4
votes
0answers
138 views

imx6q sabre board microphone

I have been trying to record audio using the circuit below. It is different from the normal microphone circuit in that the MIC_IN and MICBIAS are separate paths. I tried to connect an electret ...
3
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1answer
408 views

Piezo transducer preamp and AGC/compressor

I've been suggested this circuit as a good low-noise high gain piezoelectric transducer preamp (used to pick up really faint sounds in water). It is nice because it includes a high pass filter (yet ...
2
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0answers
57 views

How to connect Electret Microphone module and OPAMP?

I am trying to build a circuit that gets electret microphone input and maps into 0-1V for utilizing in ADC. The microphone module suggests using such circuitry When I tried that circuit and talked ...
2
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0answers
77 views

Convert 3V unbalanced microphone to 48V phantom balanced

I have the following circuit in an existing product, which has a microphone, power switch, LED indicator, and is powered by 2 AA batteries: simulate this circuit – Schematic created using ...
2
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0answers
101 views

How to connect a MEMS Microphone Breakout - INMP401 to a RN-52 bluetooth module?

I intended to use a INMP401 (MEMS MIC) to capture audio and stream it via bluetooth using an RN-52 bluetooth module (RN-52). The RN-52 has inputs for differential +- signals. The INMP outputs ...
2
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0answers
184 views

Can I replace electret microphone with audio connector and expect similar results (sound levels)?

Last night I built a circuit that allows me to obtain sound via a SEED Grove Sound Sensor and input it into my MKR Zero for frequency analysis. It's as simple as this: simulate this circuit – ...
2
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0answers
225 views

Dual antiphase electret mic preamp topology

I am currently trying to make a preamp for an electret mic pair, which are placed physically in antiphase. The main idea is to subtract one mic's signal from another and therefore boost the signal ...
2
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0answers
81 views

Audio: Camera activated external microphone

I want to build a relay circuit that turns on an external microphone (powered by an internal 9V battery) when a connected camera is turned on (a camera offering only 1V plugin power through a 3.5 mm ...
1
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0answers
74 views

MEMS Microphone noise floor power level & audio noise spikes measurement

I have a circuit with a MEMS microphone and would like to be able to measure the audio noise spike contents and check the noise floor power level in the audio circuit. My intention is to connect the ...
1
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0answers
99 views

Using an active bandpass on a very small signal

I am trying to design a active bandpass filter for an electret microphone (the output will then be read through a microcontroller to control some LEDs) (Image source - Electronics Tutorials) I want ...
1
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0answers
141 views

Is it possible to build an in-line stereo amplifier for piezo contact mics (stereo pair) with 2.5v plug-in power?

From one idea to the next, here's the back story: I'm currently taking an interest in sound design, and read an article about making sound effects from recording via contact microphones. I already ...
1
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0answers
76 views

earphone microphone out put voltage range

I want to send a signal through the 3.5mm jack(microphone port) to an android mobile and process the signal using android mobile application I created. But I don't know the voltage range the ...
1
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0answers
329 views

Switch CB Radio mic with SPST button

I'm a beginner with this type of electronics, but want to try this. I have a CB radio with a 6-pin mic/controller. The pinout looks like this: There is a DPDT switch in the mic that switches ...
1
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0answers
445 views

Choosing resistor/capacitor for wiring microphones

I've been researching how to wire up a electret mic and found this to be very common. I can't seem to find any info on what values should be used. Most people use 1k or 2.2k resistors and 4.7uF caps. ...
1
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0answers
1k views

Noise-cancelling headphone concept

Inexpensive noise-cancelling headphones use a single microphone located in a little lump between the plug and the earphones. They seem to work fairly well for ambient noises, but not for handling ...
1
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0answers
170 views

Best possible specs for a MEMS mic in 2014?

I want to use the best MEMS mic that's on the market today (June 2014) in terms of audio quality. Since I know that "shopping" questions are forbidden, I'll phrase it like this: What are considered ...
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0answers
1k views

Connecting a geophone to Arduino

Simple question: I want to connect my geophone to an Arduino input. The geophone I have is actually output to a microphone jack and I can plug it directly into my computer. I'm pretty sure I can treat ...
1
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0answers
2k views

Electret condenser microphone, LM386 amplification… does size matter?

I've built a motorcycle intercom, of which comprises of two amp units, one for the rider, one for the pillion. Both are powered by a 9v battery each, and the option (using a jumper) to enable boost. ...
0
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0answers
19 views

Converting camcorder internal microphone to external pluggable via jack

I am trying to convert excellent microphone from sony vx1000 camcorder to external one pluggable via jack. I removed the microphone and was able to find schematics I tried connecting jack directly ...
0
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0answers
24 views

Converting camcorder internal microphone to external pluggable via jack

I am trying to convert excellent microphone from sony vx1000 camcorder to external one pluggable via jack. I removed the microphone and was able to find schematics I tried connecting jack directly ...
0
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0answers
46 views

Adding LED to anti-audio pop circuit

I have built a slight variation of this circuit listed elsewhere on this site: 5v Electret microphone to PC mute switch pop help I'm using this to add an inline switch to my computer headset - ...
0
votes
1answer
38 views

polarised condensor microphone

Sir/Madam, Kindly explain how is the following equation derived for the polarised condenser microphone? The output voltage V0 fed from the microphone to the preamplifier will be how is it derived? ...
0
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0answers
68 views

extracting DC from audio signal for biasing

I've been wondering if there is a simple means of extracting a DC signal from an AC+DC signal for the purpose of providing a small DC supply to a CMOS device. Essentially the signal I'm considering ...
0
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2answers
81 views

Simplest option for generating audio tones?

I'm looking for the simplest way to generate audio tones. Something like a square or sine wave, but I want multiple tone options. For example, two quick beeps, one at 440Hz, one at 1Khz. The tones ...
0
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1answer
62 views

Can I use 48 V DC power supply to make my own phantom power?

I want to know if I can convert a 48V DC power adapter that I have at home to use it as phantom power for my condenser microphone. I only want to add some sockets that can support a microphone. ...
0
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0answers
96 views

Powering and regulating supply DC voltage for a digital MEMS microphone

I want to use Infineon IM69D120 microphones [1][2] in an array (about eight of them), and I am confused as to how exactly (with which components) should the MEMS microphones be supplied. I chose USB ...
0
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0answers
75 views

Custom microphone amplifier poor high frequency response

I've designed and received a custom MEMS microphone amplifier PCB, but am having issues with poor high frequency response and very low sensitivity/gain. Basically the microphone stops picking up ...
0
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1answer
75 views

How to mute microphone in 2-way communication when the speaker is active?

I'm making my own two way intercom for my house. There will be a speaker and microphone above the front door of my house (as well as a camera). When someone rings my doorbell, I get a notification on ...
0
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1answer
282 views

SPW2430 MEMS MIC Taking time in returning to base Voltage

BREAKOUT BOARD SCHEMATICCIRCUIT SCHEMATIC Green probe is for DSO and red probe is for DMM I am trying to create project using ESP 32 with arduino IDE which turns on when a snap is detected. I will ...
0
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0answers
491 views

Connect microphone with pre-amp to STM32 ADC

I need to record audio with STM32. I've got electret microphone and pre-amp based on MAX9812. This is a schematic from datasheet: How I can connect this pre-amp to the ADC? If I just connect it as-...
0
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1answer
286 views

MICBias Ground in audio codec

MICBias is the voltage required for microphone to power and record signal at full levels. What will happen if we ground MICBias, is it means we are disabling microphone.
0
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0answers
170 views

Electret condense microphone(ECM), its external circuit design

I got the external circuit about the Electret condense microphone(ECM), shown as in the below. I would like to know that 1). How it can work out on differential signal to input to CPU? 2). It seems ...
0
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1answer
57 views

How to safely determine which pins output a microphone signal?

I've got a Bluetooth device that has a ten-pin mini-USB output port (a Sena GP10 GoPro bluetooth audio receiver). Two of those pins output a mic-level microphone signal, but I don't know which ones. I ...
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0answers
183 views

Mini jack microphone only works in headset

This is so weird. I have never seen anything like this before. I have a Kingston HyperX headset. The microphone is detachable and looks like this. When I plug this directly into my PC or USB adapter (...
0
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0answers
587 views

Increase electret microphone bias voltage

I've got a Zalman zm-mic1 microphone, that was working just fine on my laptop. I bought a new rig a couple of months ago and the microphone is really quiet, digital amplification introduces an ...
0
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1answer
101 views

Sound localizing robot

currently working on a Hobbyist Electronic Project. I have just bought the Rover V2 robot. I have attached 3 microphones to the robot- Front, Left and Right Facing. I have written some basic code to ...
0
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0answers
357 views

Pre-amplifier to drive LM324 Op-Amps

I want use Electret microphone Pre-amplifier described in TI document, with Color light organ. Will the output level of this pre-amp enough to drive LM324 Op-Amps on Color organ? Input signal goes to ...
0
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1answer
197 views

Studio Mic --> 3.5mm jack not working

I have created a system to plug my studio mic (MXL 990) into my MacBook's 3.5mm headphone jack that consists of the following system: Mic -> AC Power supply for the mic -> 3-Prong microphone cable to ...
0
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1answer
206 views

How do I wire a Shure WL 185 to to iPhone or iPad?

I have this old but very nice mic. Old days I recorded audio to the camera or recorder. Nowadays I record to iPhone so I do not have extra recording device and cameras are action cameras usually ...
0
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2answers
476 views

Part Identification: Electret Mic

I'm currently trying to reverse engineer a remote in my headphones (one of these three button things). The remote seems to work fine, but the mic is intermittent - at times it will work perfectly, at ...
-1
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1answer
695 views

Electret microphone - How to Reduce sensitivity

I am doing a classic LED - sound reactive project. The only thing that is bothering me is that my electret microphone (MAX4466 from adafruit) is clipping, and it is because the maximum gain of this ...
-1
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1answer
161 views

Interfacing PIC32MZ Microcontroller with Microphones

Microcontroller: PIC32MZ2048EFH144 (10 Bit ADC) Software this runs on: MPLABX Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/60001191G.pdf This Microphone has a built in USB port. My ...