Abstract:
An ultra low frequency transducer or subwoofer for automotive speaker systems with a rectangular or square or otherwise polygonal diaphragm. The basket of the transducer has a correspondingly polygonal front, which preferably is sized to be substantially coextensive with the front of the speaker housing or cabinet. In this way, air displacement in the subwoofer is maximized for a given size of enclosure, and thus so is the loudness of the speaker. The preferred diaphragm is concave, and the transducer preferably includes a convex surround with pleated corners. For increased durability, trusses are formed in the diaphragm.
Abstract:
An edge is provided between an outer peripheral part of a diaphragm and a frame. The edge includes a concave part which is formed along the outer peripheral part of the diaphragm and which includes a recess. The concave part is comprised of a first material. A second material is filled in a part of the recess and has lower density than the first material.
Abstract:
Various embodiments of a silicon microphone sensing element without dedicated backplate are disclosed. The microphone sensing element has a circular or polygonal diaphragm with a plurality of perforated springs suspended above the front side of a conductive substrate. The diaphragm is aligned above one or more back holes in the substrate having a front opening smaller than the diaphragm. In one embodiment, a continuous perforated spring surrounds the diaphragm and has a shape that conforms to the diaphragm. A plurality of perforated beams connects the spring to rigid pads that anchor the movable diaphragm and spring. In another embodiment, there is a plurality of perforated springs having double or triple folding configurations and a plurality of perforated beams connecting the diaphragm to rigid pads. Also disclosed is a scheme to integrate the silicon microphone sensing element with CMOS devices on a single chip.
Abstract:
The invention relates to a micro-speaker with a second suspension made of highly resilient material installed inside of the speaker. The speaker is able to provide high level acoustic output with low distortion rate in a wide frequency range with a very small and slim structure and it may prevent a disconnection of a lead connecting the voice coil and the electrode. The speaker includes a yoke, a permanent magnet, a plate, a vibration plate integrated with a first suspension, a voice coil, a frame and a protector. The speaker further comprises a second suspension made of highly resilient material installed between the plate and the vibration plate, and is characterized in that the voice coil is attached to the lower surface of the second suspension and the vibration plate is attached to the upper surface of the second suspension and the vibration plate is attached to the upper surface of the second suspension and the outer periphery of the second suspension is fixed to the frame.
Abstract:
An ultra low frequency transducer or subwoofer for automotive speaker systems with a polygonal, concave diaphragm. The periphery preferably is sized to be substantially coextensive with the front of the speaker housing or cabinet. In this way, air displacement in the subwoofer is maximized for a given size of enclosure, and thus so is the loudness of the speaker. The transducer typically includes a frame or basket with a polygonal front for supporting the periphery of the diaphragm. The preferred diaphragm includes a convex surround with pleated corners. For increased durability, trusses are formed in the diaphragm.
Abstract:
A connecting sheet of a paper cone is provided. After overlapped, the two different surface material layers with different properties are combined together by pressurizing and heating them in a mold, and subsequently are made into an annular connecting sheet which has an arc portion with an inward extending end, and an outward extending end. The inward extending end portion is used to attach to the paper cone, and the outward extending end portion is used to attach to the iron frame of the loudspeaker. Therefore, the drawbacks of the conventional connecting sheet composed of only one surface material can be overcome, and a good acoustic quality of a loudspeaker can be obtained.
Abstract:
Acoustic device including a member extending transversely of its thickness and capable of sustaining bending waves at least over an intendedly consequentially acoustically active area of the transverse extent of said member, the member having, by reason of orderly design methodology disclosed and claimed, a distribution of resonant modes of its natural bending wave vibration at least over said area that is dependent on values of particular parameters of said members, including geometrical configuration and directional bending stiffness(es), which values have been selected to predetermine said distribution of natural resonant modes being consonant with required achievable acoustic action of said member for operation of said device over a desired operative acoustic frequency range.
Abstract:
An angled cone of a loudspeaker is formed integrally, and has an expanded end forming an outer verge extending outwardly to form a convex suspension rim. The surface of the convex suspension rim is overlaid with an elastic layer so that a better vibration form and a preferred tone quality could be outputted, and thereby, it is possible to alleviate the elastic fatigue and spoilage of the cone and control damping and value Q of the loudspeaker.
Abstract:
Acoustic device including a member extending transversely of its thickness and capable of sustaining bending waves at least over an intendedly consequentially acoustically active area of the transverse extent of said member, the member having, by reason of orderly design methodology disclosed and claimed, a distribution of resonant modes of its natural bending wave vibration at least over said area that is dependent on values of particular parameters of said members, including geometrical configuration and directional bending stiffness(es), which values have been selected to predetermine said distribution of natural resonant modes being consonant with required achievable acoustic action of said member for operation of said device over a desired operative acoustic frequency range.
Abstract:
Acoustic device including a member extending transversely of its thickness and capable of sustaining bending waves at least over an intendedly consequentially acoustically active area of the transverse extent of said member, the member having, by reason of orderly design methodology disclosed and claimed, a distribution of resonant modes of its natural bending wave vibration at least over said area that is dependent on values of particular parameters of said members, including geometrical configuration and directional bending stiffness(es), which values have been selected to predetermine said distribution of natural resonant modes being consonant with required achievable acoustic action of said member for operation of said device over a desired operative acoustic frequency range.