Loudspeaker having a passive radiator

摘要

A loudspeaker includes a rigid enclosure, and a sound projecting region formed in a wall of the rigid enclosure. The sound projecting region includes one or more active driver speakers rigidly connected with the rigid enclosure, the active driver speakers to project sound outward from the sound projecting region and to reflect sound waves within the rigid enclosure. The loudspeaker includes flexible inner surrounds that frame each active driver speaker, and a passive radiator at least partially around the active driver speakers and connected between the inner surround and a flexible outer surround. The outer surround is connected with the rigid enclosure. Electronic circuitry of the loudspeaker includes an audio data receiver to receive audio data, one or more processors to process the audio data, and an amplifier to amplify the processed audio data for playback by the one or more active driver speakers.

主权项

1. A loudspeaker comprising:
a rigid enclosure having an outer wall; and a sound projecting region formed in the outer wall of the rigid enclosure, the sound projecting region comprising:
a structural support frame securely fixed to the rigid enclosure,one or more active driver speakers each having a voice coil assembly, each voice coil assembly including a permanent magnet and a voice coil movable within the voice coil assembly, each voice coil assembly being rigidly connected with the rigid enclosure to limit movement of the voice coil assembly relative to the rigid enclosure, each active driver speaker further having a driver diaphragm configured to be driven by the corresponding voice coil to project sound waves outward from the rigid enclosure via a front surface of the respective driver diaphragm and to modulate air within the rigid enclosure via rear surfaces of the respective driver diaphragm,an inner surround for each active driver speaker that respectively frames each active driver speaker, the inner surround being formed of a first flexible material,a passive radiator disposed at least partially surrounding each of the active driver speakers, the passive radiator having an opening for each active driver speaker, each opening having an inner edge connected to a respective one of the inner surrounds, the passive radiator having a rigid diaphragm with surface area and a mass that together are configured to tune the passive radiator to have a resonant frequency below a frequency range reproduced by the one or more active driver speakers, the passive radiator configured to enhance at least low-frequency sound waves of the active driver speaker, andan outer surround formed of a second flexible material, the outer surround being connected between a perimeter edge of the passive radiator and the structural support frame of the sound projecting region; and electronic circuitry including:
an audio data receiver configured to receive audio data from an external transmitter;one or more processors configured to process the received audio data; andan amplifier configured to amplify the processed audio data for playback by the one or more active speaker drivers.