9results about How to "Improve low frequency performance" patented technology

The invention discloses a piezoelectric MEMS loudspeaker based on a folding ring between movable and fixed parts and application thereof, and belongs to the technical field of loudspeakers, the piezoelectric MEMS loudspeaker comprises a piezoelectric actuating assembly, a fixed assembly and a folding ring; the piezoelectric actuating assembly comprises a piezoelectric actuating composite layer, the piezoelectric actuating composite layer at least comprises a piezoelectric material layer, and the piezoelectric actuating composite layer generates mechanical displacement by applying voltage to drive the piezoelectric actuating assembly to vibrate so as to generate sound pressure; the fixing component can be a single structural component or a component with a plurality of structural components; the fixing assembly can be used for fixedly supporting the fixed supporting part of the piezoelectric actuating assembly, so that the non-fixed supporting part of the piezoelectric actuating assembly can freely move or vibrate; according to the invention, through the innovative design based on the folding ring between the moving part and the fixed part, the low-frequency vibration displacement of the vibrating diaphragm is remarkably improved, the problem that the low-frequency sound pressure of a traditional piezoelectric MEMS loudspeaker is insufficient is effectively solved, and the vibrating diaphragm can push air with a larger volume in a low-frequency band, so that a fuller low-frequency sound effect is obtained.

This application relates to an earphone, which includes a housing, a speaker module, and a vibrator. The housing has a receiving cavity and includes a first housing and a second housing. The first housing and the second housing are connected by an elastic connector so that the first housing can vibrate relative to the second housing. The first housing and the second housing enclose the receiving cavity. The first housing or the second housing is provided with a sound outlet, which communicates with the receiving cavity. The speaker module is disposed in the receiving cavity. The sound waves emitted by the speaker module are conducted through the air and transmitted through the sound outlet. The vibrator is disposed in the receiving cavity and connected to the first housing. The vibrator drives the first housing to vibrate so as to conduct sound waves through the bone. This application realizes the conduction of sound waves through "air conduction combined with bone conduction", and the elastic connector can effectively alleviate the sound leakage problem and improve the low-frequency sound quality.

The application provides an acoustic transducer and a terminal device. The acoustic transducer comprises a substrate, a shell and a vibrating piece. The shell is connected to the substrate. The vibrating piece is arranged in the shell. A support frame is arranged between the substrate and the vibrating piece. The vibrating piece is in a plate structure. The vibrating piece comprises at least an anchor end, a driving force arm, a torsion arm and a diaphragm. Part of the structure of the driving force arm and part of the structure of the diaphragm are movably connected to the vibrating piece. The first end of the diaphragm is connected to the driving force arm. One end of the torsion arm is rotatably connected to the connection position of the diaphragm and the driving force arm. The other end of the torsion arm is connected to the anchor end and / or the support frame. At least part of the structure of the anchor end is fixedly connected to the support frame. The distance from the torsion arm to the second end of the diaphragm is greater than the distance from the torsion arm to the end of the driving force arm away from the diaphragm. When the driving force arm rotates around the torsion arm, the diaphragm can be driven to rotate around the torsion arm and enter an open state. The acoustic transducer has the advantages of small volume, large amplitude, low first-order resonance frequency f0, good low-frequency performance and high sound pressure level.

This invention discloses a super-linear loudspeaker and its manufacturing method, comprising a square bar-shaped loudspeaker body that cooperates with a display screen. The loudspeaker body includes a support frame, which includes a first-stage frame that cooperates with a sound-generating unit and a second-stage frame that cooperates with a magnetic circuit unit. The first-stage frame and the second-stage frame are arranged in a stepped manner. The magnetic circuit unit includes a magnetic cup and a magnet disposed within the magnetic cup. The sound-generating unit includes a diaphragm disposed at the top of the first-stage frame and a voice coil that drives the diaphragm to vibrate. A magnetic gap is formed between the magnet and the sidewall of the magnetic cup to cooperate with the voice coil. A main frame is disposed between the voice coil and the diaphragm. The top of the main frame is fixedly connected to the diaphragm, and the bottom of the main frame is fixedly connected to the voice coil. By optimizing the loudspeaker shape, adding a small diaphragm structure welded to the back of the FPC, and optimizing the magnetic circuit structure, the low frequency is better during sound generation, and the power consumption, distortion, and space occupation are smaller, resulting in higher loudness.

This utility model discloses a bone conduction vibrator and electronic device, relating to the field of acoustic technology. The bone conduction vibrator includes a housing assembly, a permanent magnet circuit system, two coils, a magnetic guide plate assembly, and a reset assembly. The permanent magnet circuit system is disposed within the housing assembly and includes an iron edge assembly and two sets of magnet assemblies. Each set of magnet assemblies includes two magnets with opposite poles. The two coils are disposed within the housing assembly and are located on opposite sides of the permanent magnet circuit system. The magnetic guide plate assembly includes two magnetic guide plates that pass through the two coils and extend between the two magnets of the magnet assembly. The adjacent ends of the two magnetic guide plates are not directly magnetically connected. The reset assembly is connected between the magnetic guide plate assembly and the permanent magnet circuit system and includes a spring for providing elasticity. The spring has a suspended portion disposed opposite to the coil. The effective width of the suspended portion of at least part of the spring is smaller than its width, which helps to reduce the spring stiffness coefficient and improve the low-frequency effect.

This application discloses a sound-generating device and an electronic device. The sound-generating device includes a device housing and a voice coil and a vibration assembly disposed within the inner cavity of the device housing. The vibration assembly includes a first magnet, a second magnet, and an elastic base. The elastic base divides the inner cavity into a mutually isolated front cavity and a rear cavity. The first magnet and the second magnet are disposed on the elastic base, with the first magnet surrounding the second magnet, forming a magnetic gap between the first magnet and the second magnet. A first end of the voice coil is connected to the device housing, and a second end of the voice coil extends into the magnetic gap. The voice coil is used to drive the vibration assembly to vibrate through magnetic cooperation with the first magnet and the second magnet when energized. The above solution can solve the problem of poor design feasibility in related technologies that involve increasing the volume of the rear cavity or filling the rear cavity with sound-absorbing particles.

The utility model provides an acoustic equipment and loudspeaker device thereof, loudspeaker device includes: shell, a plurality of oscillators, a plurality of reverse phase holes, shell defines the chamber, the shell has vibration panel, vibration panel includes first area and second area arranged at intervals, a plurality of oscillators set up in first area, and be in the chamber, oscillator is configured to make vibration panel vibrate to produce sound wave, a plurality of reverse phase holes are set up on second area.

The utility model discloses a kind of bone conduction vibrator and electronic equipment, it is related to acoustic technical field, bone conduction vibrator includes shell assembly, permanent magnetic circuit system, two coils, magnetic conductive plate assembly and reset component. Shell assembly is made of magnetic conductive material;Permanent magnetic circuit system is located in shell assembly, permanent magnetic circuit system includes two groups of magnet component and iron component, and each group of magnet component includes two magnets of opposite poles and is arranged;Two coils are located in shell assembly, and two coils are respectively located at the two sides of permanent magnetic circuit system;Magnetic conductive plate assembly includes two magnetic conductive plates respectively and is arranged in two coils;Reset component includes two connecting plates and spring piece connected with permanent magnetic circuit system, connecting plate is connected between spring piece and magnetic conductive plate, and spring piece includes suspended portion between permanent magnetic circuit system and connecting plate, can make full use of the internal space of shell assembly, increase the length of suspended portion of spring piece, to reduce the stiffness coefficient of spring piece, improve low frequency effect.

The utility model discloses a phase guide pipe for enhancing low frequency and loudspeaker, the phase guide pipe is installed in the box of loudspeaker, the box has the sound wave direction from inside to outside, and the phase guide pipe includes expansion section and compression section, and the expansion section is located at the outside of compression section, and the cross section size of compression section decreases along the sound wave direction, and the cross section size of expansion section increases along the sound wave direction, and the length of expansion section is less than the length of compression section. When the sound wave in the box is discharged from the phase guide pipe through airflow, because the length of compression section is longer, so the resistance that compression section receives when compressing airflow is smaller, at this moment, the compression speed of airflow is improved and forms pressure, and after the airflow enters expansion section, because the length of expansion section is shorter, so the airflow bursts out from the phase guide pipe after sharply expanding through expansion section, thereby improving the low frequency loudness and the depth of submergence of loudspeaker.