An article in the Journal of Advanced Nursing suggests that listening to music before bed will improve sleep in older adults by over 30%. And they seem to have the evidence to back up the claim.

"Sleep, a vital ingredient in life, can sometimes become difficult as humans get older. But a recent study by researchers at Case Western Reserve University's Frances Payne Bolton School of Nursing and the Buddhist Tzu-Chi General Hospital in Taiwan shows that listening to soft music at bedtime will help older adults sleep better and longer."