6results about How to "Improve high frequency response" patented technology

The invention discloses a vibrating diaphragm assembly, a sound production device and electronic equipment. The vibrating diaphragm assembly comprises a ball top part located in the center position and a folding ring part arranged on the outer side of the ball top part in the circumferential direction, the ball top part and the folding ring part at least comprise one crosslinkable high polymer material layer of the same type, the thickness of the ball top part is larger than that of the folding ring part, the crosslinking degree of the ball top part is 50%-100%, and the thickness of the folding ring part is larger than that of the ball top part. And the crosslinking degree of the folding ring part is 0-20%. By controlling different crosslinking degrees of the ball top part and the folding ring part, the requirements of high rigidity of the ball top part and high flexibility of the folding ring part are met. The rigidity of the ball top is high, segmentation vibration is not prone to occurring in the high-frequency vibration process, and high-frequency response is good. The cross-linkable high polymer material layer of the folding ring part does not generate cross-linking or low-degree cross-linking, so that the high polymer material can keep flexibility, and the folding ring part is small in Young modulus and good in low-frequency response.

The application provides a piezoelectric decoupling type thruster three-direction excitation force measuring device and measuring method, relates to the technical field of propeller excitation force measurement, and comprises a three-direction piezoelectric force sensor, a propeller and a transmission shaft. One end of the three-direction piezoelectric force sensor is connected with the propeller, the other end of the three-direction piezoelectric force sensor is connected with the transmission shaft, and the three-direction piezoelectric force sensor is installed inside the transmission shaft. The three-direction piezoelectric force sensor measures unsteady hydrodynamic force or unsteady aerodynamic force of the propeller in the longitudinal direction, the transverse direction and the vertical direction. The application adopts a force measuring disc with a thin plate configuration and a measuring rod with a rod configuration, decouples the radial excitation of the propeller and the longitudinal excitation, measures three-direction excitation force of the propeller installed at the front end of the transmission shaft through the piezoelectric force sensor, occupies a small space, and can directly measure the three-direction unsteady excitation force of the propeller in a complex environment.

The utility model provides a microphone and an electronic device, the microphone comprises a substrate and a chip body, the chip body is located above the substrate, and a first electrode layer on the chip body is connected with the substrate; a back polar plate assembly is arranged above the substrate, the back polar plate assembly comprises a supporting frame and is connected with a chip body through a connecting piece, and the chip body is located between the supporting frame and the substrate; a second electrode layer is arranged on one side, facing the chip body, of the supporting frame, a vibrating diaphragm is arranged at the top of the chip body, and variable capacitance is formed between the vibrating diaphragm and the second electrode layer; the supporting frame is provided with a plurality of sound hole sets, each sound hole set comprises a sound hole groove, and a plurality of strip-shaped sound holes are formed in the sound hole grooves. According to the microphone, the sound wave propagation path is changed through the multiple sound hole groups, standing waves are reduced, and high-frequency response is improved; the connecting piece realizes stable connection between the support frame and the chip body, and reduces vibration conduction at the same time.

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 utility model discloses a kind of plane diaphragm loudspeakers of composite film coil, including shell, plane film is equipped in shell, the side of plane film away from shell is equipped with A face coil;A face coil is annular structure of coiling, the middle part of A face coil is left empty to form A face coil hollow position, A face embossed film is equipped in A face coil hollow position, A face embossed film is completely filled and set in A face coil hollow position, A face embossed film is set on plane film, the side of plane film close to shell is equipped with B face coil, the center through hole of plane film is centrally provided;B face coil is annular structure of coiling, the middle part of B face coil is left empty to form B face coil hollow position, B face embossed film is equipped in B face coil hollow position, B face embossed film is completely filled and set in B face coil hollow position, B face embossed film is set on plane film.The utility model can improve high frequency response, optimize sound quality performance, bring better auditory experience for user.

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.