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An acoustic board includes a rectangular frame, a rectangular panel formed with a plurality of conical holes and sized to engage with the rectangular frame, a plurality of large sound collecting members each having an open end and mounted on an inner bottom of the rectangular frame, and a plurality

An acoustic board includes a rectangular frame, a rectangular panel formed with a plurality of conical holes and sized to engage with the rectangular frame, a plurality of large sound collecting members each having an open end and mounted on an inner bottom of the rectangular frame, and a plurality of small sound collecting members each having an open end and mounted on the inner bottom of the rectangular frame, whereby sound will be confined within the sound collecting members thereby largely decreasing noise in magnitude and therefore effectively isolating the noise from one side to another.

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1. An acoustic board comprising:rectangular frame having a groove extending along a circumference thereof, said frame having a bottom integrally formed thereof; a rectangular panel formed with a plurality of conical holes and sized to engage with said rectangular frame, said conical holes of said pa

1. An acoustic board comprising:rectangular frame having a groove extending along a circumference thereof, said frame having a bottom integrally formed thereof; a rectangular panel formed with a plurality of conical holes and sized to engage with said rectangular frame, said conical holes of said panel being chamfered at large diameter thereof; a plurality of large sound collecting members each having an open end and mounted on an inner bottom of said rectangular frame; and a plurality of small sound collecting members each having an open end and mounted on said inner bottom of said rectangular frame, said sound collecting members being integrally formed with a sound collecting board; whereby sound will be confined within said sound collecting members thereby largely decreasing noise in magnitude and therefore effectively isolating the noise from one side to another.