Podcast #128: We chat with Kent C Dodds about why he loves React and discuss what life was like in the dark days before Git. Listen now.

Questions tagged [microphone]

A sensor converting an acoustic signal into an electric one.

Filter by
Sorted by
Tagged with
0
votes
0answers
42 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 - ...
2
votes
0answers
46 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 ...
0
votes
1answer
45 views

Cannot connect microphone using audio jack

I have a microphone and a female 3.5 mm audio jack. I want to use the jack to get the signal from the microphone for a project with an arduino. To test if the microphone works or not, I'm trying to ...
0
votes
1answer
194 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
votes
1answer
93 views

How to record a speaker?

Complete noob here. I don't need a ready to implement solution, pointers on what to read upon and ideas for even simpler projects to gain experience first are perfectly fine. I'm trying to feed both ...
1
vote
1answer
2k views

Technical name for 3.5mm microphone input and speaker output to headphone with microphone cable? [closed]

I am trying to find a cable online that takes the front jacks on my computer case (speaker out, audio in) and merges them so I can use my headphones that have a built in microphone. What would I ...
1
vote
1answer
46 views

How can I make a phantom power mic popless mute switch?

I want to make a phantom power (PP) mic mute switch with an indicator led powered by PP. I already did it based on the following circuit. It works but, with the led included in the circuit, I get a ...
0
votes
2answers
59 views

3.5mm Push to Talk Switch

I am looking to take a 3.5mm microphone line, insert a press button switch (a foot pedal in my use case) between the headset and the computer. I would like the switch to mute the mic connection when ...
0
votes
1answer
236 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
votes
1answer
249 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.
3
votes
1answer
4k views

Wiring a 1920s intercom to a contemporary door-entry phone

I have recently purchased a 1920s wall-mounted intercom: I would like to connect this unit to our existing "4+n" door entry phone system, replacing the cheap plastic handset that we currently use (...
0
votes
1answer
44 views

Microphone Pre Amp Book? [closed]

I'm wondering if there's a book that discusses resistors, capacitors, inductors, transistors, transformers, impedance, op amps, power supplies, and the general circuitry of a microphone pre amp. Thank ...
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
votes
2answers
74 views

Why electret microphone with Op Amp circuit cause signal negative half wave to distort

This circuit works quite well with low signal levels, but when the RMS ac signal is appr. 0.8 to 1.0 V (measured on pin #1 of the opamp), the negative half wave of sinusoidal signal is distorted so ...
1
vote
1answer
78 views

Adapting two-way radio tactical throat mic (laryngophone) to cell phone or laptop

I've ordered one of these: https://www.amazon.com/gp/product/B074Z1LDY2/, a tactical throat mic (and earpiece speaker) which is intended to be used with Kenwood two-way radios (and other compatible ...
3
votes
1answer
391 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 ...
1
vote
1answer
93 views

ADC distortion when writing to microSD

I am doing my own project making a basic audio recording device using microcontroller's ADC to get the audio signal from electret microphone and saving data to microSD card. I'm using STM32L476RG ...
0
votes
2answers
455 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 ...
0
votes
1answer
29 views

Can i bypass the builtin rectifier and directly supply dc to my microphone preamp and reverb board

I currently have this mic preamp and reverb board that accepts 12-0-12 ac: original I have a 24v 10a switching supply and i found a way to create a 12-0-12 dc using this tutorial on youtube Would ...
0
votes
2answers
72 views

Electric current in mic

For a typical mic a singer uses in a concert, how much current is generated when the singer sings? The current transmitted from the diaphragm into the wire. What does the following specification tell ...
2
votes
0answers
59 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
votes
1answer
459 views

Polar pattern of typical speakers and microphones found in smartphones

I'm interested in knowing how is the directivity of the typical microphones and loudspeakers found in smartphones and tablets affected as they operate in the near ultrasound region (18-21 kHz). Near ...
0
votes
0answers
62 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
votes
1answer
49 views

Bad background noise in audio capture [closed]

I have a microphone attached to a Realtek ALC5640. The circuitry is as below: L9 is Murata BLM15PD121SN1D The noise capture is here. How could I improve the situation and reduce this noise, if ...
7
votes
3answers
30k views

simple microphone - speaker circuit

This is my first time creating a circuit, so forgive my poor understanding. I am trying to create a simple intercom system with a 9v battery. I have an 8 ohm speaker and a standard microphone: (...
27
votes
2answers
12k views

What makes one microphone better than another, and how do I make my own?

I am curious about microphones and have a few questions. What is the key component in them which makes one better than another? What does it take to build a high quality microphone on my own? I'm ...
7
votes
5answers
23k 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 ...
2
votes
1answer
1k views

Will this phantom power circuit work?

I'm designing a musical instrument in which two oscillators (one based on a Quad NAND gate, the other on a 555) are controlled by a signal from a condenser microphone. At the moment the mic is being ...
8
votes
5answers
5k views

Generating a differential signal

I was given a small task (actually it's part of a much larger task) where the requirement is to generate a signal which looks like it came from a microphone. The following requirements needs to be ...
4
votes
1answer
88 views

(Electret Microphone) Why is input taken from the capacitor?

Why is the input signal taken from the -ve side of the capacitor? I do understand that the resistor has been added for voltage divider. Is this actually for filtering purposes? Or is the capacitor ...
8
votes
3answers
977 views

Why is the collector feedback bias popular in electret-mic preamp circuits?

I got some simple electret microphone modules and I've been experimenting with audio amplifiers. I googled to find some example circuits, and I found that most of them resemble the circuit above. I ...
0
votes
4answers
1k views

Convert Electret Microphone output to digital data for transmition [closed]

I might be asking a stupid question but.... I was wondering about whether or not there is a circuit to convert the output of an electret microphone to 1s and 0s for transmission. And then we can use ...
0
votes
1answer
37 views

Car microphone; very low signal

I would like to use a car microphone for bluetooth communication. The mic is a BMW one: 84316938762. The wiring diagram (TIS) marks the mic's two connectors for the pin 1 and 2: TIS (X18507). ...
0
votes
1answer
54 views

How can I attach a USB microphone to a Breakout-board using ADC Ports? [closed]

I am almost a total noobie to electrical engineering and I bought a programmable Drone called "PlutoX" from here. I am currently trying to attach a USB microphone like this: to the so called "X-...
2
votes
1answer
49 views

LM567 or Custom bandpass filter

I'm using a array of hydrophones to localize an underwater pinger (37.5 kHz and 45 kHz) and I'm thinking of using LM567 tone decoder as a frequency filter. The other option is to design a custom ...
4
votes
1answer
125 views

Why an 8kHz notch on the headset mic input of a Qualcomm WCD9330?

I have here a smartphone which uses a Qualcomm WCD9330 audio codec IC. (Itʼs a Galaxy Note 4.) Iʼve discovered through testing that the headset microphone input exhibits a roughly 10dB notch in its ...
1
vote
2answers
455 views

Boosting a microphone for a noisy, low sensitivity input?

To avoid running into an XY problem, here is the problem I really have: I have a RODE NTG2 microphone, and a Zoom H4n Pro recorder. The NTG2 has an XLR output, balanced, and it operates from either a ...
0
votes
1answer
134 views

Motorola telephone-style handset audio to 3.5mm jack

I retrieved a Motorola Telephone-Style handset wich was in service with a Motorola radio GM380. It is the same as https://shop.motorolasolutions.com/rln4756-telephone-style-handset/product/RLN4756A ...
0
votes
1answer
94 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
votes
1answer
45 views

Translating mic sensitivity dBV to dBSPL

In mic datasheets, mic sensitivity is usually expressed in dBV that equates to 94 dB SPL (@1kHz). So if my mic sensitivity -46 dBV equates to 94 dB SPL, does that mean that if I double the signal by ...
2
votes
1answer
175 views

Noise sensing microphone in the ANC circuit has three terminals

I am trying to understand ANC practical implementation from a headset in which ANC has been implemented. The microphone which senses the noise has three terminal. I have only seen microphone which has ...
5
votes
1answer
2k views

Electret Microphone Preamp Circuit

The following electret microphone preamp circuit seems to work pretty well. My electret model is a little off because on the bread board R6 needs to be ~33k to get the output at 1/2 supply. Just a ...
0
votes
1answer
43 views

SMT electret microhone PCB mounting [closed]

I see a lot of SMT microphones in vendors' lineups. All of them orient normal to the PCB--either up or down. I'm working on a design where the microphone has to point parallel to the PCB. On the ...
1
vote
1answer
59 views

Electret microphone - connect to Codec

I'm new to audio and I want to ensure if it's proper circuit for integrate MAX9860 codec and EMG-610P microphone? EMG-610P details: https://www.monacor.com/media/FLE/EMG610P.pdf MAX9860: https://...
8
votes
3answers
6k views

Electret Microphone preamplification - will it work for dynamic type microphone?

I'd like to use this diagram to pre-amplify a microphone signal in order to activate the analog input of my arduino (source: reconnsworld.com) Will it work with a dynamic microphone in place of an ...
0
votes
2answers
443 views

Microphone output resistance, why this value?

I would like to sample the output of a microphone. I am using the following set-up in order to tune the DC offset at the microphone output. simulate this circuit – Schematic created using ...
0
votes
1answer
102 views

What's the purpose of the inductor in this microphone biasing schematic?

I'm just wondering what's the purpose of the inductor in this microphone biasing schematic? Could it be that I have very low input signal from the microphone because of missing L1? Bias generator ...
2
votes
2answers
382 views

Device to loopback mic to headphones

I have an issue with my headset. I can’t stand not being able to hear myself speak. I’d like to build a passive device to loopback the mic to the headphones that would be plugged in-line between the ...
10
votes
2answers
2k views

Using a microphone from the 1930s

I have an old Braun Cosmophon BMF2020 microphone at home, which I have long been wanting to use for good ol' fun. I have virtually no technical knowledge, so I am completely uncertain how to power ...
1
vote
1answer
108 views

Positive pin on microphone

Hello can anyone tell me what is the positive on this microphone ?