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Questions tagged [mems-microphone]

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0
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0answers
67 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 ...
2
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0answers
38 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 ...
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0answers
62 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 ...
2
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1answer
120 views

MEMS microphone gain calculation for MCU ADC

I've got a Knowles SPH1642HT5H-1 (pdf link) analog MEMS microphone that I'm planning to connect to one of the ADC inputs on an STM32. I've done what I think are the correct calculations to determine ...
0
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1answer
132 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 ...
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2answers
45 views

finding microphone specification

How to find output voltage of microphone when sensitivity given is -38dBV . I want to compare volatges for various Sound pressure level. Link of datasheet is : https://store.invensense.com/...
2
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1answer
104 views

Can I connect a MEMS mic directly to this spectrum analizer chip?

I have a ICS-40181 MEMS mic and want to do basic spectral analysis using the popular MSGEQ7 chip for the purpose of a sound reactive project. Can I simply connect one into the other (with cap/res as ...
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0answers
71 views

Why do MEMS microphones break so easily?

I am currently building an electronic stethoscope using very small microphones. I've noticed that a MEMS microphone breaks easily when touched and that an electret condenser microphone doesn't. As far ...
2
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1answer
201 views

How to check if MEMS microphone is working?

I am using a MEMS microphone that I got from Digi Key ( Part Number: 1428-1021-1-ND). I soldered the mic on a PCB board using hot-air and then add an amplifier to increase the gain (Operational ...
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0answers
483 views

I2S Connections - MEMS Digital Microphone, CODEC, and Raspberry Pi Zero W

I have a MEMS Digital Microphone with PDM output. I am planning to use this: http://www.st.com/content/ccc/resource/technical/document/datasheet/57/af/88/31/7b/59/4f/77/DM00111225.pdf/files/...
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2answers
360 views

Understanding digital MEMS microphone sensitivity and obtained bits for a given input SPL

I'm trying to understand /simulate the communication between 2 smartphones by means of ultrasounds. As this is a general study I'm considering that the smartphones are equipped with the "typical" most ...
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1answer
336 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 ...
-2
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1answer
358 views

Biasing analog MEMS microphone [closed]

I am using a analog type MEMS microphone.(SMA120). Interface chip PCM2912 provi SMA100 data sheet PCM2912a data sheet PCM2912 product page not for new designs Could you kindly suggest me a proper ...
-1
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0answers
341 views

STM32F4 Data logging to SD card

My system is microphone - stm32f401 nucleo board - SD card I am using ST extension board for mems mic and software STM32CubeExpansion_MEMSMIC1_V1.2.0. This open source soft is acquires the mic and ...
1
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1answer
944 views

how to solder MEMS microphone to PCB at home? [closed]

I would like to experiment with audio applications using MEMS microphone. The problem is i cannot think of a way to solder these microphones on a pcb as PCB prototype manufacturers that i know won't ...
-1
votes
1answer
501 views

I2S output to a sound card

I followed this tutorial on building a microphone with two MEMS mics and a cheap USB sound card - it works pretty well, although I'm looking to upgrade the MEMS mics to some with better SNR and ...
3
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3answers
5k views

Microphone connection diagram

I am trying to replicate project Jasper of raspberry pi. Currently I am using a USB to audio converter (shown in image below) and a regular PC mic. However the audio reception range is very small. So, ...
0
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2answers
904 views

Noisy record for STMicroelectronics MP45DT02 digital mems microphone

I bought STM32F4DISCOVERY board and I developed a software that records .wav file using MP45DT02 MEMS microphone on this board. .wav files that I record are really good (almost no noise). I designed ...
2
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1answer
293 views

Can I connect my ADMP401 straight to my computer's microphone jack?

So I'm looking to get a bit more value out of this little 'ol microphone I have. It has a Vcc, GND, and an analog data port on the breakout board. Could I splice a 3.5 mm jack wire and connect the ...
2
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1answer
913 views

Testing an I2S slave device

i have a MEMS mic with digital I2S output. What is the easiest way to test that my microphone communicates right? No need to verify the sound, i just need to verify on bit level that communication ...
1
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1answer
2k views

I2S interface ideas for multiple MEMS microphones

I plan on forming a microphone array with 4 MEMS microphones and doing the signal processing(beamforming) in matlab/C on my PC. MEMS mics i use have Digital I²S interface with high precision 24 bit ...
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1answer
1k views

How can use MP45DT02 and CS43L22 DAC with STM32F4?

I'm doing an application with MP45DT02 MEMS audio sensor omnidirectional digital microphone. I'd like to use a STM32F4 MCU to control it, but I don't know much about it. Can I take input from the ...
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0answers
168 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 ...