Automatic way of applying the same command to a bunch of files

["Paul Smith" <phhs80@xxxxxxxxx>]

Dear All

I have in a directory a bunch of wav files to which I want to apply
the following command:

sox filename.wav -r 44100 output_filename.wav

How can I do that at once, i.e., without having to insert manually for
each wav file the corresponding above command?

Thanks in advance,

Paul