New research from Northwestern University shows that playing a musical instrument for even a brief period in childhood can improve actual hearing. Adults who had a least a couple years of music instruction in childhood heard fundamental frequency sound waves better than those who did not have music instruction.  This is an aspect of hearing well in noisy environments; something we all deal with in Denver, even if the outdoors is our preferred habitat.
One more of the many reasons to start lessons in-home music lessons. The benefits will be seen for years to come, in ways science might not even be aware of right now! Any instrument will do. Piano, guitar, voice, trumpet, saxophone, etc.
Want more info:http://www.soc.northwestern.edu/brainvolts/documents/SkoeKraus_JNeurosci_2012.pdf