What algorithm to use for speech activity detector?

Question

Algorithms

I am looking for an easy-to-implement VAD (Voice activity detector) algorithm.

Answer 1

You can pull out a ready-made one from codecs used for speech compression,
for example www.speex.org
or find an implementation of G.729 en.wikipedia.org/wiki/G.729
Another option is to pull it out of any speech recognition engine like sourceforge.net/p/cmusphinx/ code/HEAD/tree
In general, dig in this direction.