GraphAudio, a graphene-based acoustic products company has recently had its CEO, Ramesh G. Ramchandani, be interviewed by Graphene Info. This interview spanned a series of questions and topics, with some of the most notable ones being as followed.
When asked how graphene is used to create the sound driver, Ramesh responds with: “We use electrostatic technology, which is not a new invention… quite the contrary in that electrostatic technology was invented about the same time as the conventional widely used dynamic speaker (about the turn of the 20th century), but it was never adopted into wide use primarily because the diaphragm materials were not environmentally stable – gold flashed animal gut was the original diaphragm. With the advent of polymer technology it was used to replace the animal intestine, many high end audiophile speakers have been sold to that niche market; since this technology eliminates the voicecoil weight of conventional dynamic speakers it has the reputation of exceptional clarity and imaging. Unfortunately these products are not very common, Martin Logan is a conventional speaker using electrostatic technology; and Sennheiser with its flagship ship “Orpheus” headphone ($59K), STAX and most recently Shure having more reasonably priced products. Our goal is to leverage our graphene technology and drive into mainstream usage.”
When asked about the current production capacity, Ramesh responds with: “We are working in a research facility and because of COVID issues we are further constrained, but our team believes that it’s critical to run a baseline of material in order to do proper development. We have a standard process flow which yields us approximately 100 transducers a month. This may not seem like much, but it’s easily scalable and adequate for our current development needs. We are in conversations with several foundries to scale our technology into mainstream production environments.”
When asked about the process used to produce CVD graphene, Ramesh answers as such: “We use conventional semiconductor process equipment to make our graphene films. The process is highly proprietary.”