Yes, inhaling the steam helps in moistening the vocal box and can be soothing for singers. Not only breathing the steam helps in relieving the irritating voice box but also it helps in improving the performance of singers. You can sit comfortably and breathe the steam through your nose for about 3-5 minutes. Repeat 2-3 times a day if required. Make sure that you do not inhale the steam while standing over boiling hot stove water.