Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

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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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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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: (source: seeq.com.au) My circuit looks like this…
user2330561
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What is a reasonable ohmage measurement for a microphone on a PC headset?

I've taken apart my PC audio headset, because the microphone stopped working. This random website seems to imply that most microphones for PC headsets are "low impedance" between 150 and 300 ohms. After taking out the pickup unit, I find it is…
Ross Rogers
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Will providing line-level signals into a mic input damage the recording device?

I've got a cell phone, gopro, and DSLR that I want to record audio into. I don't want to record audio into a separate device. The problem with analog mic-level (millivolt) signals is that they require amplification inside the recording device…
fuzzybabybunny
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Wired headset circuit

I'm trying to understand how mobile phone headsets work. I figured out that the electret mic gets supplied with 2.7V by the phone. Opening a headset revealed the following PCB: I looked and measured and came up with the following…
superno
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Smartphone microphone sensitivity

I'm working on a project including usage of several smartphone built-in microphones. However, I have no idea what sensitivity (e.g. mV/Pa) should I expect. I haven't came across any manufacturer's specification that would reveal that info. And…
chluchad
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Audio pickup for safe cracking

I'm a safe engineer and have little to no idea regarding electrical engineering, however I'm more than capable of soldering components and very willing to learn but also begrudge spending £300 for a sound amplification system (again!!) I've seen a…
user13553
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Passive wind cancellation - possible?

I've hit a stumbling block on a relatively simple project. I have a helmet, a Contour camera on which I have piggybacked a microphone interface to put a mic inside my helmet, to be able to speak and reduce wind noise a bit. However, it is still…
Sébastien Renauld
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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 models). I'm interested in using this with…
Aaron
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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 two terminal (one for power and signal other one…
TapasX
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How to test a capacitive microphone

How can I test a mini capacitive microphone? I have a mini microphone(something used in telephones) and I want to create a circuit to see how it works? I want to speak to it and see how current or voltage or resistance changes as I speak to it
Ali.Rashidi
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CTIA TRRS to 2 x TRS (for laptops): is the mic plug TR shorted together for bias power?

When you connect a (CTIA) mobile headset TRRS plug to a PC with separate green/pink jacks you can find Y-splitters TRRS(F) to 2 x TRS(M). My question: since the PC mic-in(pink jack) expects 3 conductors and provides 5V bias power on R do these…
Anthony Alba
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When wiring an electret microphone is using the wire shielding as ground ideal?

Currently with a "single-conductor" shielded wire I have connected the (+) pole of the mic capsule to the wire, and the (-) pole to the shielding strands. I am wondering why the ground wire doesn't also need shielding -- can performance be…
user391339
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Can any microphone approach the sensitivity of the Human ear in the same mass/volume?

I recently dropped a very tiny object onto the floor in a normal room (mass probably low milligrams). I heard it hit the ground. I would like to build a circuit that could "hear" such a small sound and register it. The caveat here is that I also…
Dirk Bruere
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