Inertially balanced miniature low frequency speaker system

摘要

An inertially balanced miniature passive radiator full-range loudspeaker system is disclosed. In one embodiment the speaker system is a two-way system with low and high frequency components, where the low-frequency component is comprised of one active transducer and two passive radiators and the frequency range for this component is not outside of 10 Hz to 500 Hz. The low and high frequency components are individually optimized for operation in low and high frequency ranges respectively. By placing the passive radiators on opposing sides of an enclosure of the speaker system, the momentum generated by the motion of each of the passive radiators substantially cancels when the passive radiators are in phase. A passive radiators may be fitted with a voice-coil electrically connected to a corresponding voice-coil on the other passive radiator in a pair such that the generated back EMF resists out of phase motion of the passive radiators.

主权项

1. An inertially balanced loudspeaker system comprising:
a rectilinear enclosure, enclosing a first acoustic volume and a second acoustic volume acoustically separate from the first acoustic volume, the enclosure having opposing first and second vertical sides and a horizontal side comprising either a top side or a bottom side; a single active low frequency transducer disposed in the horizontal side and acoustically coupled to the first acoustic volume; a high frequency active transducer acoustically coupled to the second acoustic volume; and a crossover configured to split an input signal into a low frequency portion and a high frequency portion, the low frequency portion coupled to the low frequency active transducer and the high frequency portion coupled to the high frequency active transducer; and a single pair of passive radiators acoustically coupled with the first acoustic volume and consisting of a first passive radiator disposed in the first vertical side and a second passive radiator disposed in the second vertical side, wherein momentum produced by oscillations of the first and second passive radiators is balanced to provide the inertially balanced loudspeaker system.