Baffle board is a term used to refer to a sound-absorbing material typically used in recording studios. This board helps to reduce undesirable echoes and reflections from the walls of the room. Some synonyms for baffle board include acoustic panel, sound-deadening board, soundproofing board, sound-absorbing panel, and acoustic treatment. These terms all refer to materials or products that are designed to improve the acoustics of a room by reducing unwanted sound reflections. While they may differ in composition and application, these synonyms all serve the same purpose of improving the sound quality in a given space.