Original question:
I do it as your method,but it can't settle for our function.
Your answer as follows :
"add a power supply decoupling cap to U2, replace L5 and L2 by a short circuit and remove the short circuit between the output of circuit and VCC. Remove C6 and replace it by a resistance.
What role plays R6 in your circuit? This resistance is not necessary when an electret microphone is connected. Have a look at figure 39 of datasheet. Do also remove C10.
Kai "
Hi user5896542,
The issue you are experiencing is being caused due to the fact that C3 shorts the OPA1678 output to its positive supply at audio frequencies. To help resolve this, add a series resistance of 600Ω between L5 and U1 pin 2, then add a 2.2µF decoupling capacitor from Vcc to GND: 
This should provide the following frequency response:
with -3dB frequencies at 732Hz and 71.1kHz.
