Sound Meditation

I have been interested in sound meditation practices and sound healing for many years. Many of these practices are beautiful, supportive and very healing. Some of them make me go ??? And others I find just plain silly. But the one question that keeps me puzzled is why people can clearly see the radiating, spherical nature of sound which is produced by instruments such as singing bowls, bells, chimes, symphonies, etc, but do not see this in respect to humans meditating through sound.…