Respeaker 2mic Hat vs Respeaker 4 mic array

Products & Technology ReSpeaker
#1

Hi,



I purchased both the Respeaker 2mic hat using the Cirrus Logic WM8960 chip and the Respeaker 4 Mic Array using X-Powers AC108 chip for testing.



I seem to be getting better audio recording from the 2 mic board as compared to the 4 mic board. The 2 mic board has more noise but a louder recording volume when testing from far away. The 4 mic array has a much lower recording volume.



Has anyone experienced similar issues? I would think the more expensive 4mic Array would perform better.

#2

Hi， We tested the 2 mic and 4 mics. I use my cellphone to play wakeup word “snowboy” repeatedly and record by audacity. the distance is around 1m.


  1. We use the raspberry 3.5mm audio port as output for both pi hats. we can hear the 4 mics has higher record volume. please make sure you turn the raspberry speaker volume to 100%.


  2. For 2 mic pi hat, Then we connect the speaker to 2 mic pi hat 3.5mm audio port. the volume is higher than the volume on the raspberry 3.5mm audio port.


  3. There is no big volume differences between 2 mics 3.5mm audio port volume and 4 mics raspberry 3.5mm audio port volume.



    thanks



    Seeed techsupport team

    Bill
#3

I have the same question. It is not the volume from the audio OUT but how well the Microphone records.



I have used the 2 mic board and the 6-mic board, and I seem to be getting better audio recordings with the 2 mic board.



What is the differences in the microphone devices themselves between the 2 mic and 6 mic PI hats?



I have also ordered the 4 mic board as well, and will be testing that one.



Thanks

#4

Hi there~



My bad to miss the point.


  1. the 2 mics use the WM8960 and the 4 mics/6mics use the AC108. The gain of the WM8960 is bigger than AC108.
  2. the 2 mics pi hat uses SAO-3729-M-42-008 mic. The 4 mics pi hat uses SPU0414HR5H-SB mics. The 6 mics pi hat uses MSM321A3729H9CP mics. the mic sensitivity is also different.



    <LINK_TEXT text=“https://statics3.seeedstudio.com/images … 030037.pdf”>https://statics3.seeedstudio.com/images/opl/datasheet/312030037.pdf</LINK_TEXT>

    http://www.mouser.com/ds/2/218/SPU0414HR5H-SB-28439.pdf

    <LINK_TEXT text=“http://www.memsensing.com/webupfile/153 … .0-ENG.pdf”>http://www.memsensing.com/webupfile/1531103042534785279.0-ENG.pdf</LINK_TEXT>


  3. if you want to test the performance, you have to use the fix audio source for the sound, then use the audacity to see the amplitude differences.



    thanks.