Questions tagged [microphone]

A sensor converting an acoustic signal into an electric one.

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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 looking to purchase a good microphone, and was…
capcom
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Normal capacitor vs. audio capacitor

I'm building a power supply for old Schoeps CMT30F microphones. Standard condenser mic are 48V-powered nowadays, but these are 60s/70s Schoeps mic from RadioFrance/ORTF, customized at that time to be -9V or -10V powered. I need to add capacitors to…
Basj
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Electronic aspects of iPhone 3.5mm audio output

I am working for a while now on a small project of building an external mic for the iPhone to be hooked in parallel to headphones (via the 3.5 mm jack). Basically, I want to replace the iPhone's original headset microphone with another microphone,…
user11678
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Using a microphone with an Arduino

EDIT : I have been investigating in this problem for quite some time. It turns out to be a way more difficult project than I thought and not something for beginners. This requires expensive hardware (microphone & amplifier) and some sophisticated…
Toast
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Want a USB mini-microphone array. Is it possible?

I have been learning a lot about adaptive beam-forming, and have been mucking around with various sims in MATLAB, etc. But what better way to understand something - truly understand it - than to play with the entire system? To this end, I would like…
Spacey
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Digital data coming out of a cell phone headset mic?

I want to connect a sound board / mixing console / whatever-you-prefer-to-call-it to the headset jack of my Motorola Android phone. I know the typical TRRS pinout of Left/Right/Ground/Microphone, and I know about the mic being phantom-powered by the…
AaronD
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How do I get +5v for loud noise, 0v for silence from Electret Microphone (or other components)?

I have been asking a few questions here to get to a proper one, the initial questions I asked are linked to at the end. I used Fritzing to make up some schematics of my initial thoughts, but at the very least I need help with the values on the…
Ehryk
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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 a small permanent static charge built in. I am…
Sean
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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 microcontroller. The ADC on the microcontroller…
Shubham
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Is there any way to measure sound intensity in decibels without using a microphone?

I am trying to measure sound intensity in decibels without using microphone in a home automation project. Due to privacy concerns, I don't want to use a microphone in the device. Is there any way I can measure sound intensity without a microphone…
Moaz Azam
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Can a comparator (LM393) be used as an amplifier?

I have seen modules for microphones (such as the one below) that use the LM393 and claim to have amplification. I have looked this part up and it is a comparator. I have read that op amps can be used as comparators, but I don't understand if the…
Arik Yavilevich
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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 kept: 1.0Vpp Sine Wave Differential Now these are…
Tom L.
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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 the device, and if it would be possible to connect…
Tim Stack
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Electret microphone: selecting a bias resistor

I have inherited a circuit from a colleague using a MAX4063 pre-amplifier and an electret microphone . It's almost identical to figure 4 from the preamp datasheet: But where that circuit has 2× 1 kΩ resistors in series, I have just one. I'm not…
pjc50
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Connect speaker output to microphone input

What exactly is the difference between a microphone signal and a speaker signal? I want to make a simple cable to connect a PC speaker output to a microphone input. Does anyone have a good idea or circuit for doing this? Edited I want to transfer…
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