A resonance flat panel speaker includes a wireless music vibration body, at least one resonance sounding board and a resonance sounding cloth arranged in the wireless music vibration body. A first surface of the resonance sounding board is attached to a sound vibrator in the wireless music vibration body. A second surface of the resonance sounding board is attached to an inner surface of the resonance sounding cloth. The resonance sounding cloth is combined with an outer frame of the wireless music vibration body with a tensile force of 5 kg-20 kg. The resonance sounding board is matched with different audio resonance points of the resonance sounding cloth to produce a full range flat panel speaker.

A loudspeaker diaphragm that includes a resin containing silica derived from seed coats and a compatibilizer as an additive.

Aheadphone configured to emit a fractal-polarized sound field is provided. The headphone comprises a sound-emitting membrane, an acoustic oscillator, and an ear pad. The sound-emitting membrane comprises a paper-based composite material layer, a metal layer, and a coating layer. The paper-based composite material layer has a front surface and a rear surface, with the front surface facing a user ear. The metal layer is provided on the front surface of the paper-based composite material layer and configured to reproduce HF acoustic oscillations. The coating layer is provided on the metal layer and has one or more slots through which the metal layer is visible. The coating layer is made of a material incapable of reproducing the HF acoustic oscillations. The acoustic oscillator generating the acoustic oscillations is attached to the rear surface of the paper-based composite material layer. The ear pad is configured to cover the coating layer.

A biodegradable microphone has a housing fabricated from a biodegradable ferromagnetic filament. The ferromagnetic filament is based on a biodegradable polymer having embedded magnetic materials. The housing has a body portion, an open first end and an opposite second end having a central opening. A permanent magnet is removably lodged within the central opening. The ferromagnetic filament and the magnet cooperate to produce a magnetic field within the housing interior. A biodegradable diaphragm is joined to the open first end of the housing. The diaphragm has an interior side facing the housing interior. A biodegradable coil is joined to the interior side and extends downward into the housing interior and is in proximity to the permanent magnet. Vibrations of the diaphragm cause a reciprocating motion of the coil within the magnetic field thereby inducing an electrical current in the coil.

A display apparatus includes a display module including a display panel configured to display an image, a rear cover on a rear surface of the display module, and a sound generating module at the rear cover and configured to vibrate the display module to generate sound, and a rear surface of the sound generating module is covered by the rear cover.

The disclosure relates to an electronic apparatus including: a speaker including a transducer provided in an enclosure of a housing and configured to perform an amplitude movement based on a first driving signal, and an active radiator configured to perform an amplitude movement based on a rear wave due to the amplitude movement of the transducer and a second driving signal; and an amplifier configured to output the first driving signal corresponding to the sound signal and the second driving signal which complements the amplitude movement of the active radiator based on the rear wave of the transducer and allows an output sound pressure of the active radiator to be a target value.

An intelligent police car loudspeaker includes a loudspeaker mechanism composed of a dust cover, a paper cone, a yoke ring, a centering piece, a magnet, a voice coil, and a soft iron core. The voice coil is disposed around the soft iron core. The magnet is disposed around the voice coil. The paper cone is disposed above the magnet. The centering piece is disposed above the magnet and located inside the paper cone. The yoke ring is disposed above the centering piece and located inside the paper cone. The dust cover is configured to cover an opening of the paper cone. With the present invention, the level of intelligence of the loudspeaker can be improved.

An intelligent police car loudspeaker includes a loudspeaker mechanism composed of a dust cover, a paper cone, a yoke ring, a centering piece, a magnet, a voice coil, and a soft iron core. The voice coil is disposed around the soft iron core. The magnet is disposed around the voice coil. The paper cone is disposed above the magnet. The centering piece is disposed above the magnet and located inside the paper cone. The yoke ring is disposed above the centering piece and located inside the paper cone. The dust cover is configured to cover an opening of the paper cone. With the present invention, the level of intelligence of the loudspeaker can be improved.

Embodiments of the present disclosure provide a display apparatus and an electromagnetic actuator, the display apparatus includes a display structure, a sound-emitting substrate, at least one electromagnetic actuator and a stabilizer; where one side of the sound-emitting substrate is attached to the display structure, and the electromagnetic actuator is fixedly attached to the other side of the sound-emitting substrate through the stabilizer; the electromagnetic actuator includes a bracket and a plurality of flexible support feet extending away from the bracket. The electromagnetic actuator is fixedly arranged on the sound-emitting substrate through the stabilizer, and the bracket receives the electromagnetic actuator, the plurality of flexible support feet can keep the electromagnetic actuator stable during the vibration process of the electromagnetic actuator, which helps avoid position shift of the electromagnetic actuator under long-time working.

In at least one embodiment, a loudspeaker assembly for a vehicle is provided. The assembly includes a diaphragm; a loudspeaker, and a carrier. The loudspeaker includes a first end for being positioned in a first area of the vehicle that is exposed to external ambient noise to the vehicle and a second end for being positioned in a second area of the vehicle that is exposed directly within an interior cabin of the vehicle to provide desired audio along a first axis to the interior cabin. The carrier is attached to the second end of the loudspeaker and includes noise absorption material to prevent the external ambient noise from entering into the vehicle. The carrier defines a plurality of openings positioned on an outer perimeter thereof to enable the desired audio to enter into the interior cabin along a second axis that is different than the first axis.