Patent ID: 8842868

Claim:
An improved structure for a passive radiation sound box comprising: a body, which is formed an inner room and a sound-guide tunnel through a plurality of clapboards, the surface of the body being disposed an outlet connecting with the sound-guide tunnel; a passive radiation component, each of the two ends of a vibration film having an edge, the passive radiation component being disposed between the clipboards, the edges of the two ends of the vibration film being connected with the clipboards; and an amplifier unit, which is surrounded in the inner room by the clapboards and the passive radiation component, a vibration film of the amplifier unit being disposed on a side surface of the inner room of the body, the passive radiation component being beneath the amplifier unit; wherein while the amplifier unit is vibrating and sounding, partial sound pressure in the inner room being through the inner room by way of the passive radiation component, and being then released by the outlet along the sound-guide tunnel.