Select frequence-​----------​----------​----------​----------​----------​----------​----------​----------​----------​----------​----------​----------​----------​----------​----------​----------​----------​----------​--------'-​----------​----------​----------​----------​---

I don't now how can I use the modules of MatLab to know if someone talk between 500Hz and 650Hz and near 1800Hz. Its important for my projet in science of ingeniring because we need to reconize the world "helpe"

[Rik]

Have a read here (or here for more general advice). It will greatly improve your chances of getting an answer.

[Walter Roberson]

https://www.mathworks.com/help/audio/ug/FrequencyDomainVoiceActivityDetectionModel.html

https://www.mathworks.com/help/deeplearning/examples/deep-learning-speech-recognition.html

https://www.mathworks.com/matlabcentral/answers/?term=tag%3A%22speech+recognition%22

[Adam Danz]

What's with all the noise in the title? If you have a clearer question regarding the use of Matlab please edit the question and title and try again.