Active Acoustic Meta Material Loudspeaker System and the Process to Make the Same

摘要

An active acoustic meta material system with micro-perforated sheets embedded between porous layers and air gaps, around the output region in front of a speaker, perpendicular to the direction of wave propagation of the sound is disclosed. Sound input is split into two frequency ranges by an active controller, such that a higher frequency range is sent to a traditional speaker which outputs sound via a diaphragm which vibrates in response to electromagnetic signals generated based on the sound input. The sound waves in the lower frequency range are sent to piezoelectric or other type of motion-creating transducers which are mounted to an outer housing or casing containing a plurality of meta material sheets with insulative layers between each meta materiel sheet. The combination of meta material sheets and insulation layers are calibrated to focus and amplify the vibrational waves which are outputted by the transducers.

主权项

1. A speaker comprising:
a diaphragm directing sound transverse to a plane of said diaphragm; a torus of material surrounding said transverse direction of said sound; said torus of material further comprising:
at least one layer of a micro-perforated sheet;at least one layer of insulation; a plurality of spaced apart transducers on an external side of said torus outputting pressure waves through said at least one micro-perforated sheet.