37results about How to "Improved low frequency acoustic performance" patented technology

The present disclosure provides a sound absorbing material. The sound absorbing material comprising a heteroatom zeolite molecular sieve comprising a framework and an extra-framework cation, the framework comprising SiO2 and a metal oxide MxOy comprising a metal element M, wherein the framework has a molar ratio of Si / M between 250 to 500, wherein the M includes Fe, and that the extra-framework cation is at least one of a monovalent copper ion, a monovalent silver ion, a monovalent gold ion, an alkali metal ion or an alkaline earth metal ion. The sound absorbing material provided by the present disclosure, sound absorbing material to have better oxygen adsorption capacity, good waster repellency and stability. When such a sound absorbing material is applied to a speaker box, the speaker box will have better low frequency acoustic performance and better reliability.

The invention provides a sound absorbing material. The material comprises an MEL structure molecular sieve, the MEL structure molecular sieve comprises a skeleton and a skeleton outer cation, the skeleton comprises silicon oxide and an oxide MxOy of an element M containing a non-silicon element, the skeleton is characterized in that the mass ratio of Si / M in the skeleton is at least 80, the skeleton outer cation comprises at least one of a hydrogen ion, an alkali metal ion, an alkaline earth metal ion and a transition metal ion, and the content of the skeleton outer cation is between 0.05 wt.% and 1.5wt. %. The invention also provides a speaker using the sound absorbing material. Compared with the prior art, the sound absorbing material of the molecular sieve of the MEL structure is addedto the speaker, which can significantly improve the low frequency performance of the speaker, and the sound absorbing material has strong resistance to performance degradation in practical applications.

The present disclosure provides a sound absorbing material, a manufacturing method thereof and a speaker using the sound absorbing material. The speaker comprises a shell with a receiving space, a sound production unit disposed in the shell, and a rear cavity encircled by the sound production unit and the shell. The rear cavity is filled with a sound absorbing material. The sound absorbing material comprises MEL structured molecular sieves. The framework of the MEL structured molecular sieves comprises silicon dioxide.

The present invention provides a loudspeaker box, which includes a housing with a storage space and a sound-generating unit partially accommodated and fixed in the storage space. The monomer includes a diaphragm for vibrating and sounding; the upper cover includes an upper cover extension wall fixedly connected to the lower cover, and a main body part that bends and extends from the upper cover extension wall to the sounding monomer, and the main part penetrates through the outer leaking diaphragm. The sound outlet, the sound unit is equipped with a positioning boss; the shell and the positioning boss are made of metal, and the sound unit is welded and fixed to the main body through the positioning boss; the lower cover is located on the side of the sound unit away from the diaphragm and is connected to the The extension wall of the upper cover forms a seal, and the upper cover, the lower cover and the sound emitting unit together form the rear acoustic cavity. Compared with the related art, the volume of the rear acoustic cavity of the speaker box of the present invention is large, and the low-frequency acoustic performance is excellent.

The invention provides a loudspeaker box. The sounding unit divides the storage space into a front cavity and a rear cavity, and a retaining wall separates the rear cavity into a first rear cavity and a second rear cavity. The lower cover includes a lower cover body, a convex wall, The through hole, the support step and the cover plate, the lower cover body and the convex wall together form a sound guide groove, and the sound guide groove communicates with the second back cavity; the through hole connects the first back cavity with the sound guide groove; the distance between the two support steps It is arranged on opposite sides of the through hole; the cover plate completely covers the through hole; the air-permeable spacer fits on the convex wall and completely covers the sound guide groove, the second rear cavity is filled with sound-absorbing particles, and the air-permeable spacer encapsulates the sound-absorbing particles In the second rear cavity to form a virtual acoustic cavity; the airflow in the first rear cavity bypasses the blocking wall and then passes through the through hole and the sound guide groove and enters the second rear cavity through the breathable spacer. The two supporting steps are respectively located in the channel The holes are parallel to opposite sides of the direction of airflow flow. Compared with related technologies, the speaker box of the present invention has excellent low-frequency acoustic performance.

The invention provides a speaker box, which includes a casing and a sound-generating unit fixedly accommodated in the casing. The sound-generating unit includes a diaphragm for vibrating and sounding; the casing is made of metal material, and the casing includes a first bracket and the front cover and the rear cover respectively covering the opposite sides of the first bracket along the vibration direction of the vibrating membrane, the first bracket is provided with a through hole passing through it; the sounding unit is provided with one side of the diaphragm facing the through hole and The front cover is supported and fixed to the first bracket; the front cover includes a front cover plate arranged opposite to the sounding unit and a side wall of the front cover that is bent and extended from the periphery of the front cover plate to the first bracket and fixed to the first bracket. The wall is provided with a sound outlet running through it; the front cover, the sounding unit and the first bracket together form a front sound cavity, and the sound outlet communicates the front sound cavity with the outside world; the sounding unit, the first branch and the back cover together form rear voice. Compared with the related art, the speaker box cavity of the present invention has a large volume and good acoustic performance.

The invention provides a loudspeaker box, which includes a housing with a receiving space and a sounding unit fixedly accommodated in the receiving space, the sounding unit and the housing form a closed rear acoustic cavity, and the sounding unit includes a The diaphragm; the shell is made of metal material, and the speaker box also includes an auxiliary cavity shell that is abutted and fixed on the outside of the shell. The auxiliary cavity shell and the shell together form an auxiliary sound cavity, and the shell is provided with a leak port that runs through it. , the leak connects the rear acoustic cavity with the auxiliary acoustic cavity. Compared with the related art, the loudspeaker box of the invention is easy to assemble, has high assembly reliability and good sealing performance.

The invention provides a loudspeaker box, which includes a shell made of metal material, a sounding unit and a ring-shaped bracket made of plastic material, the shell includes a front cover and a rear cover, and the bracket includes a bracket main body and The sound guide part of the bracket extending from the main body of the bracket; the sound emitting unit is supported on the bracket and spaced from the front cover; Exposed to the shell, the sound guide part of the bracket is provided with a sound guide channel; the sound unit, the bracket and the front cover together form the front sound cavity, and the sound unit, the bracket, the front cover and the rear cover together form the rear sound cavity, and the sound guide channel will The front vocal cavity communicates with the outside world. Compared with the related art, the cavity of the loudspeaker box of the present invention has large volume and good acoustic performance.