I cannot say if loud pipes save lives but it cannot hurt. One thing I did notice though is if there is a car or bike chasing dog it alerts them in advacne so they can try to nip at your heals. Once I almost hit a dog trying to chase me.
Dennis

You may say I'm a dreamer but I'm not the only one John Lennon Imagine Anyone who stops learning is old, whether at twenty or eighty, anyone who keeps learning stays young, the greatest thing in life is to keep your mind young. Henry Ford