Laminated acoustic wood wall panels from all visible sides are made from:
26x20x14 oiled oak veneer laminated slats
painted or covered with textile MDF board
Installation. Panels from their width are mounted side to side, panels length could be extended connecting it each to other with 3 - 5 mm gap.
Payable panels length is 2780mm, but panels can be produced under your required length 2400mm or so.
Under special order with waiting time of up to 3 months, panels can be produced in 3030mm length.