This type of meditation uses a sound like a mantra, a nature sound like the wind or ocean, or the sound Ah or Om. When in a room where many people are repeating the same sound the effect is incredible!
Different types of sounds produce different types of vibrations and depending upon what you are feeling or want to achieve you will have to try different sound vibrations that resonate with what you want.
Primordial sound meditation was started in the Vedic tradition of India. The more you practice this type of meditation you can achieve deeper senses of awareness which will result in a more peaceful state and open up the creativity and well-being inside of you.