Decibel (DECIBEL PLC) is a European engineering and manufacturing company for soundproofing, room acoustics and vibration control, founded in 2012 by Tsvetan Nedkov and Diana Nedkova in Sofia (Bulgaria). Nedkov holds a doctorate on methods for calculating the sound insulation of wall linings for recording studios and concert halls, and leads the company's research and development department. The company became a public liability company (PLC) in 2020. Production facility: 2,000 m² factory in Botevgrad (Bulgaria), opened 2014, with CNC wire-cutting machines, CNC cutting and folding equipment for metal processing, and CNC cutting machines for plastics and foams. Offices (outside HQ): Romania, Serbia, Austria, UK, USA, South Africa; over 20 distributors worldwide; products available in over 42 countries. Award: Forbes Innovation Award 2022 (product innovation). Over 5,000 successfully completed acoustic projects.

Product range: soundproofing panels and systems for residential, office, club and industrial applications; sound absorbers and acoustic absorbers (Diamond — for mid and high frequencies, offices, studios, restaurants; TETRIS — with precise absorption curves and controlled diffusion; HexyBEL — hexagonal wall panels; wood-slatted acoustic panels for high-end interiors; wood wool absorbers for public and commercial spaces; open-cell acoustic foams for studios); industrial soundproofing enclosures and barriers for production lines, machinery, presses; vibration isolators for compressors, pumps, fitness equipment and vehicles; audiology booths for hearing tests and research. Over 30 innovations and patents in acoustic insulation technology. Project services: acoustic consultancy, acoustic engineering, turnkey soundproofing projects including final control measurements.

For architects and acoustic planners seeking a complete provider of soundproofing and room acoustics for office projects, hotels, restaurants, studios, industrial buildings and public spaces — delivering engineering planning, production, delivery and installation from a single source — Decibel is the most direct Bulgarian address: with a product programme ranging from invisible acoustic layers to ISO-certified industrial enclosures, and a demonstrated growth trajectory that made it Forbes Innovation Award winner 2022.