Concept Sketches Concept Sketches from R.D. Silva Concept Sketches Audio Concepts - Simplifying the basic concept of Headphone design and Table top speakers. I explored minimal design and mechanical function. gLike Concept Sketches Audio Concepts - Simplifying the basic concept of Headphone design and Table top speakers. I explored minimal design and mechanical function. Industrial Design Share R 7 n R.D. Silva Engineer Assistant/ Marketing Design Consultant at Doer Oakland, CA Follow Contact