What is the significance of singing bowls in depression.

Question

I think singing bowl plays a vital role in healing and meditation since a very long period of time. In ancient time, it is believed that people use singing bowl for serving the food. The sounds generated by Tibetan singing bowls promote healing from stress, disorders, pain, depression, and many kinds of diseases with no side effects.

I found the different singing bowls in www.nepacrafts.com, but i don't have any idea how to use.