3results about How to "Improve low frequency response" patented technology

The method for tuning the flat acoustic transducer by area comprises the following steps: defining a forward center tuning area corresponding to the middle area of the diaphragm and a forward periphery tuning area corresponding to the periphery area of the diaphragm on the front cavity end face of the flat acoustic transducer; applying one or more layers of superimposed and combined tuning materials with different air permeability and thickness in the forward center tuning area and the forward periphery tuning area respectively; defining a backward center tuning area corresponding to the middle area of the diaphragm and a backward periphery tuning area corresponding to the periphery area of the diaphragm on the rear cavity end face of the flat acoustic transducer; and applying one or more layers of superimposed and combined tuning materials with different air permeability and thickness in the backward center tuning area and the backward periphery tuning area respectively. The structure for tuning the flat acoustic transducer by area comprises a flat acoustic transducer, a forward tuning system constructed on the front cavity end cover of the flat acoustic transducer, and a backward tuning system constructed on the rear cavity end cover of the flat acoustic transducer.

The loudspeaker waterproof structure comprises a loudspeaker assembly, the loudspeaker assembly comprises a loudspeaker body and a loudspeaker support, the loudspeaker support is provided with a mounting groove, and the loudspeaker body is arranged in the mounting groove; the loudspeaker bracket is provided with a mounting groove for accommodating the loudspeaker body; the loudspeaker support is provided with a loudspeaker hole and forms a first cavity with the loudspeaker body. The front shell assembly is provided with a sound guide hole corresponding to the horn hole, and the sound guide hole is in butt joint with the first cavity to form a second cavity; the waterproof gum covers the sound guide hole. A coherent acoustic channel is formed through a dual structure of a first cavity formed by the loudspeaker support and the loudspeaker body and a second cavity in butt joint with the sound guide hole, it is ensured that sound is directly transmitted from the front face of front sound output, and distortion or volume attenuation caused by shielding is avoided. And water vapor and dust are directly prevented from entering from the outside through the sealing of the waterproof gum at the outer side of the sound guide hole, so that the waterproof performance is ensured, the acoustic path is optimized in cooperation with the cavity structure, and the sound quality loss is reduced.

This utility model discloses a miniature loudspeaker, including a diaphragm assembly and a voice coil. The diaphragm assembly includes a center mount, which includes a body. The body has downwardly bent extension arms on opposite sides, and the bottom of each extension arm has an outwardly bent mounting arm. The voice coil is fitted onto the mounting arm. This miniature loudspeaker ensures effective suspension depth of the voice coil in the magnetic gap, significantly improving magnetic field utilization, BL value, and BL symmetry, optimizing distortion. It also eliminates the need for a separate frame and its corresponding assembly process, achieving a balance between high performance and low cost. The voice coil is located outside the extension arms, allowing for a wider diaphragm surround, thereby improving the low-frequency acoustic performance of the miniature loudspeaker.