Hi, I got a same issue.
Everything works fine on builtInMic, but the accuracy get highly decreased when I connected with bluetooth headset.
After read the source code of pocketsphinx and OpenEars and did some test.
I’m figuring, if we connected with 8k sample rate bluetooth device. Should we add “-samprate 8000” when we init the decoder?
Here is the result of my test:
Input: 63 wav files with 9 grammar (8k sample rate).
case 1: without “-samprate 8000”
TOTAL Words: 63 Correct: 9 Errors: 54
TOTAL Percent correct = 14.29% Error = 85.71% Accuracy = 14.29%
case 2: with “-samprate 8000”
TOTAL Words: 63 Correct: 58 Errors: 5
TOTAL Percent correct = 92.06% Error = 7.94% Accuracy = 92.06%
Thank you.