1find your Python version by python --version mine is 3.7.3 for example
2the easiest way to check either you have 64 or 32 Python just open it in the terminal:
3
4find the appropriate .whl file from here, for example mine is PyAudio‑0.2.11‑cp37‑cp37m‑win_amd64.whl, and download it.
5go to the folder where it is downloaded for example cd C:\Users\foobar\Downloads
6install the .whl file with pip for example in my case:
7pip install PyAudio-0.2.11-cp37-cp37m-win_amd64.whl