A study on the acoustic behavior of boards produced from lignocellulosic materials is very important from the point of view of their usage in modern buildings and constructions. Lignocellulosic materials such as wood, natural fibers, etc. are available abundantly and are being processed to produce panels for various applications. In applications such as lecture halls, cinema halls, auditoriums, class rooms, opera halls, etc., the information regarding acoustic properties such as sound absorption coefficient (SAC), noise reduction coefficient (NRC), and sound transmission loss (STL) are essential to evaluate the acoustic performance of the panel products and to enable the required design calculations. The acoustical performance of wood and panel products made from lignocellulosics was described for their use as sound-absorbing material. Using the standing wave method, the acoustic properties, viz. SAC of panel products, are determined, which can be used by the engineers and architects as an input in deriving acoustic efficiency of the room/buildings where these materials are used and also for designing enclosures/buildings for acoustic applications. The chapter includes the SAC and NRC values of the panels of different thickness and density at frequencies ranging from 125 Hz to 4000 Hz assessed in a third-octave band. It is detected that boards with low-density possess high SAC and NRC values when compared to high-density boards. SAC values were also found to increase with a decrease in the board density and vice versa.