I love the way you described gong bath meditation: "they are like getting a massage but with sound". I believe this is what truly defines your business. And this logo seeks to represent exactly this.
First of all, a circle is, among others, a symbol of life. The everlasting cycle. Like energy, life is never truly created nor destroyed. Life is always transforming.
The various circles in different weights represent the life being transformed into a better, happier, clearer life. That's the result of your meditation sessions and that's what we want your audience to see.
Like the sounds of a gang, the circles also represent the sounds coming from all directions and resonating inside the bodies of your customers.
It's an abstract and feminine, yet modern and sophisticated logo. And most importantly, it represents the results your customers have. That's a key factor to a memorable logo.