The Total Harmonic Discussion / the THD Podcast. A weekly discussion on audio and headphone technologies and the people who bring the technology to market. In episode 9, Nick Huffman, CEO of Clarasonic, talks about his factory in Thailand that specializes in the production of Rohacell based speaker diaphragms. Clarasonic also makes carbon fibre, glass fibre, kevlar, and other composite based cones. In addition, natural fibres such a hemp both woven and un-woven are available.