This is an audio description for "Sound Effect 3". It's a special effect sound that combines elements of synthesis to create a unique auditory experience. The sound starts off subtly, gradually building intensity with an array of layered synth tones, each contributing to a soundscape that is both soothing and stimulating. The synth tones intermingle, creating a harmonious blend which gives the effect of an auditory illusion. The sound ebbs and flows, taking the listener on a sonic journey. It's an immersive sound effect that's as intriguing as it is captivating.