Beautiful voice and sound often can heal and encourage us. The feeling depends on each person. I think everyone have some favorite voices.
In my case I love voice of a vocalist of Spitz, is very famous rock band. There are my favorite songs of them, however, I especially love their song "Kaede" 楓. It is sad love song. Kaede means maple tree in Japanese. I think his voice is soft and has special wavelength. I am always fasinated by it and feel confortable. His voice is just my healing voice.