8results about How to "Improve low frequency response" patented technology

The invention discloses a moving-coil geophone zero-phase corrector based on a state variable shaper. The zero-phase corrector comprises a state variable shaper, a differential-to-single-ended module and a single-ended-to-differential module. After a moving-coil geophone signal is input into a differential signal, the signal is converted into a single-ended signal suitable for filtering through the differential-to-single-ended module, and a high-pass filter, a band-pass filter and a low-pass filter in the state variable shaper correct the phase characteristic of the frequency response of the geophone to a zero-phase attribute. And finally, the single-ended to differential module converts the single-ended signal into a differential signal again and outputs the differential signal. The phase characteristic correction method can be used for phase characteristic correction of differential signals of the moving-coil geophone, low-frequency response can be expanded while the phase is corrected by changing resistance value adjustment, gain stability in the original bandwidth is kept, phase characteristic correction is provided for output of the moving-coil geophone with different frequencies and amplitudes, and the correction precision of the moving-coil geophone is improved. And the accuracy of the detector signal phase is improved.

The utility model discloses a double panel unit module and an earphone, the double panel unit module comprises a support and two panel units, the support is provided with an upper installation groove and a lower installation groove, the two panel units are respectively installed in the upper installation groove and the lower installation groove, and the two panel units are horizontally and symmetrically arranged up and down. Through the two panel units which are horizontally and symmetrically arranged up and down, mutual interference of vibration can be reduced, low-frequency response can be improved, meanwhile, due to the fact that the two panel units are symmetrically arranged and sound pressure is overlapped, a higher sound pressure level is generated, the propagation intensity of sound energy on a unit area is increased, sound is made to be stronger and clearer, and the sound quality is improved. And the sound pressure level of the unit is improved, so that a high-strength signal can be better processed, the accuracy and fidelity of the signal are improved, and the occurrence of dynamic distortion is reduced.

The present invention relates to the technical field of audio devices, and in particular to a loudspeaker with enhanced low-frequency response, comprising a bracket, drum paper, voice coil, magnetic mechanism and terminal, the drum paper, voice coil, magnetic mechanism and terminal are all mounted on the bracket, the number of voice coil, magnetic mechanism and terminal are two, two voice coils are respectively mounted on the two end surfaces of the drum paper, two magnetic mechanisms are respectively mounted on the two voice coils, two terminals are both mounted on the bracket, and the two terminals are respectively electrically connected to the two magnetic mechanisms. The present invention arranges voice coils and magnetic mechanisms at both ends of a drum paper, two voice coils are directly bonded to a drum paper, the voice coils move in the same direction, and because two magnetic mechanisms are arranged, the driving force is doubled, which will have the advantage of greatly improving the sound pressure level, and the use of double voice coils increases the vibration mass in the vibration system, thereby further expanding and enhancing the low-frequency response of the loudspeaker and the sound box.

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.

The utility model relates to the technical field of Bluetooth sound equipment, in particular to light induction sound equipment. The sound equipment comprises a sound equipment main body, the sound equipment main body comprises an annular mounting rack, a battery module and a Bluetooth module are mounted in the mounting rack, a loudspeaker and a sealing film are arranged on the mounting rack at intervals, a control mainboard is mounted at the top of the mounting rack, and a light assembly is mounted at the bottom of the mounting rack; the number of the loudspeakers and the number of the sealing films are multiple, and the two ends of each battery module are located between the adjacent loudspeaker and the adjacent sealing film. The battery module, the Bluetooth module, the loudspeaker and the light assembly are all electrically connected with the control mainboard. The lamplight assembly comprises a plurality of illuminating lamps, and luminous bodies of the illuminating lamps are arranged downwards; and the lampshade is mounted at the bottom of the mounting frame. According to the utility model, the technical problems of large volume and reduced portability caused by low integration level and low space utilization rate of each component in the light sound box in the prior art are effectively solved.

The invention is suitable for the technical field of sensors, and provides a pm-level tensile compression type high-sensitivity optical fiber detector which comprises a mass block and two winding mechanisms. According to the pm-level tensile compression type high-sensitivity optical fiber detector, through the arrangement of the two winding mechanisms, the detector body is free of floor noise, high in signal-to-noise ratio, high in sensitivity, high in resolution ratio, low in distortion degree, large in dynamic range, wide in frequency band, especially good in low-frequency response, good in high-frequency response, high in electromagnetic interference resistance and resistant to lightning stroke; the detection and transmission of deep ground and deep sea seismic wave effective signals take light as a carrier, are almost not influenced by electromagnetic interference, are low in optical fiber loss and are suitable for long-distance transmission, and the transmission distance can reach tens of kilometers or even farther, so that long-distance arrangement, observation and arrangement can be realized, field construction operation is facilitated, and the cost is reduced. According to the invention, seismic wave information with high signal-to-noise ratio, high fidelity and high resolution from deep ground and deep sea can be detected and collected, so that detection of deep ground and deep sea becomes true.