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Green Technology is widely explored to manufacture materials from agricultural waste by-products as substitute to synthetic fibers and wooden-based materials for acoustic absorption purposes. This study was conducted the coconut coir (CC) natural fibers bound with sodium silicate as sound reducers. Boards were fabricated using 40g of CC mixed with 400mL of 20% sodium silicate solution, casted in 8”x 8”x 1⁄2”, compressed for 24h, and sun-dried for 8h. Sound Pressure level (SPL) before and after acoustic board insertions were monitored from 50-5000Hz frequency range using an acoustic chamber. A three-layer egg board was used as positive control. Three replications were conducted. Data showed that CC-sodium silicate based absorber can effectively reduce the sound pressure level. The maximum noise absorption peak (MNAP) for CC acoustic board occurs between 50 to 550Hz, while between 1950Hz to 2100Hz for the positive control. Results suggests that coconut coir based acoustic board was causing in attenuating sounds at low frequency range, while the positive control could reduce sounds efficiently at high frequency range. Data revealed that the fabricated board could be a potential sound-proofing medium. This innovative acoustic absorber board showed its viability as low-cost, biodegradable, and eco-friendly material compare to glass fiber and mineral based synthetic materials.