MEMS microphones Forum Discussions

粉丝在知乎回答评论区问的问题，回答链接为：https://www.zhihu.com/question/21228020/answer/3061279701#comment-10697233726?notificationId=1693996809859575808

问题为：SMD为密封双膜技术，与DBP技术有区别吗？

希望工程师能解答，谢谢~

How to connect and communicate with the STM32 and IM69D130 PDM interfaces, which bus protocols are used?

smartconx_target@Q!w2e3r4t5y6u7i8o9p0||/t5/%E3%83%AC%E3%82%AC%E3%82%B7%E3%83%BC-%E3%83%9E%E3%82%A4%E3%82%AF%E3%83%AD%E3%82%B3%E3%83%B3%E3%83%88%E3%83%AD%E3%83%BC%E3%83%A9%E3%83%BC/IM69D130-%E3%81%AEPDM%E3%82%A4%E3%83%B3%E3%82%BF%E3%83%BC%E3%83%95%E3%82%A7%E3%83%BC%E3%82%B9%E3%82%92stm32%E3%81%AB%E6%8E%A5%E7%B6%9A%E3%81%97%E3%81%A6%E9%80%9A%E4%BF%A1%E3%81%99%E3%82%8B%E6%96%B9%E6%B3%95/td-p/497852

There are discrepancies on the datasheet.  Figures 6 and 7 show that the THD at 110dB SPL and below is much lower than 0.1%.   However, Table 3 specifies the typical THD at 94dB SPL to be 0.5%.   This is a significant difference.

Hi, i'm recording sound wave using Infineon S2GO MEMSMIC IM69D MEMS Microphone.

https://www.hackster.io/Infineon_Team/i2s-mems-microphone-im69d130-for-raspberry-pi-848b81

I follow the whole process exactly by referring to this link.

When i play the .wav file, i can only hear the noise .

What can i do to solve this problem?

I'm using the Infineon Nano Audiohub eval board with the IM69D130 microphones and using Audacity to record the audio.

It appears that the eval board automatically mutes the mic audio when there is no speech. I can record speech all day but as soon as I try using white noise as the sound source the audio mutes. This seems to happen regardless of the audio level. Does this board have some sort of noise blanking? Is there anyway to disable if there is?

Hi, i'm recording sound wave using Infineon S2GO MEMSMIC IM69D MEMS Microphone.

https://www.hackster.io/Infineon_Team/i2s-mems-microphone-im69d130-for-raspberry-pi-848b81

I follow the whole process exactly by referring to this link.

When i play the .wav file, i can only hear the noise .

What can i do to solve this problem?

Hi,

I was wondering if an ECAD model existed for the ultrasonic sensor ES – IM70A135UT. I would like to implement it on a PCB card using Kicad, to do so I need the 2D PCB Symbol & Footprint. If not, maybe a similar one exists? 

Thanks,

Mhelyn