Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
kinjalgp said:Yes, you have to use medium/high speed Analog-to-Digital converter having sampling frequency of atleast 40kHz for accurate sound reproduction of sonic signals (20Hz to 20KHz)
crust said:kinjalgp said:Yes, you have to use medium/high speed Analog-to-Digital converter having sampling frequency of atleast 40kHz for accurate sound reproduction of sonic signals (20Hz to 20KHz)
For music applications 20-20k is considered the desired range. However, that is way beyond what is needed for an audio remote control -- the sound will not be played back. The spectral content of human voice at higher frequencies is very low. The bandwidth of your average telephone is only 3kHz. The important part of this project is to recognize the voice commands, not reproduce them.
I think plotoyee could get by without sampling at 40kHz, I would start at telephone sampling (6kHz) and go down from there. I think the actual algorithm is probably going to be more difficult than determining the proper sampling frequency.