223results about "Magnetostrictive transducers" patented technology

A computer-implemented system and method for pupil-directed retinal projection in near-eye displays are disclosed. The computer-implemented system provides smart glasses with directed physical pixels that project light beams / signals directly onto a user's retina based on pupil position and size. The glasses comprise a frame, lenses with directed pixel layers, and sensors for tracking pupil movement. Each directed pixel may generate multiple virtual pixels by rapidly changing its emission angle. The glasses function as prescription lenses, virtual reality displays, and augmented reality devices without traditional optical systems. Additional features include depth sensors, cameras, and connectivity to peripheral devices. The glasses enable a seamless blend of virtual and real-world experiences, creating an immersive “Mixverse” environment. Various input methods, including gesture recognition and brain-computer interfaces, allow for intuitive control and interaction.

An air-pulse generating device includes first and second cells. The first cell includes first flap and second flaps configured to perform a first differential movement to form a first opening. The second cell includes third and fourth flaps configured to perform a second differential movement to form a second opening. The first flap and the second flap are opposite to each other and actuated to move toward opposite directions to perform the first differential movement. The third flap and the fourth flap are opposite to each other and actuated to move toward opposite directions to perform the second differential movement. The second flap of the first cell and the third flap of the second cell are actuated to move toward opposite directions and disposed adjacent to each other.

An air-pulse generating device, a wearable sound device, bladeless fan, and an airflow producing method are disclosed. The air-pulse generating device includes a film structure, configured to be actuated to generate a plurality of air pulses at an ultrasonic pulse rate. The plurality of air pulses produces a net airflow toward one single direction.

An air-pulse generating device includes a film structure including a first flap and a second flap opposite to each other. The film structure is actuated to operate at an ultrasonic frequency, and the air-pulse generating device produces a plurality of air pulses at an ultrasonic pulse rate. The first flap and the second flap are actuated to perform a differential movement to form an opening or a virtual valve. A slit is formed between the first flap and the second flap, and the opening or the virtual valve is formed because of the slit. The slit is formed as a zigzagging pattern on the film structure.

A controller configured to control a sound producing module includes a volume controlling unit configured to determine a demodulation amplitude and a modulation amplitude corresponding to a target volume. The sound producing module comprises a driving circuit and an air-pulse generating device. The driving circuit generates a demodulation driving signal according to the demodulation amplitude and generates a modulation driving signal according to the modulation amplitude, so as to drive the air-pulse generating device. The air-pulse generating device produces sound via generating a plurality of air pulses at an ultrasonic pulse rate.

The invention provides a sound production device and electronic equipment. The sound production device comprises a first transducer and a second transducer, the first transducer comprises a first base and a first vibration assembly, the outer periphery of the first vibration assembly is fixed to the first base, the second transducer comprises a second base and a second vibration assembly, and the second vibration assembly is fixed to the second base. The second vibration assembly and the first vibration assembly are oppositely arranged at an interval. A vibration space is defined by the middle of the first vibration assembly and the second transducer, an acoustic channel is defined by the second vibration assembly and the outer periphery of the first vibration assembly, and the vibration space is communicated with an external space through the acoustic channel. The sounding device is simple in structure and small in size.

The present disclosure is of a bone conduction microphone. The bone conduction microphone comprises of a laminated structure and a base structure. The laminated structure is formed by a vibration unit and an acoustic transducer unit. The base structure is configured to load the laminated structure. At least one side of the laminated structure is physically connected to the base structure. The base structure vibrates based on an external vibration signal, the vibration unit deforms in response to the vibration of the base structure, and the acoustic transducer unit generates an electrical signal based on the deformation of the vibration unit. A resonant frequency of the bone conduction microphone is within a range of 2.5 kHz-4.5 KHz.

The invention provides a sound transmission device which can transmit clear sound to a user without damaging the user and can be actually used. This sound transmission device (1) is provided with: a transducer (2); a transmission plate (3) that transmits vibration to the bone of the head of a person; a housing (4) that houses the transducer (2); and a ring member (7) that is disposed so as to cover the side surface of the housing (4). Furthermore, the transducer (2) includes a giant magnetostrictive element (21), permanent magnets (22a, 22b) disposed at both ends of the giant magnetostrictive element (21), and a coil (23), and the permanent magnet (22a) disposed at one end is connected to the transmission plate (3). The housing (4) is configured so as to include a housing part (41) that houses the transducer (2), and a counterweight body (42) that is connected to the permanent magnet (22b) disposed at the other end. In addition, the ring member (7) holds the side surface of the housing (4) via the damper member (6).

A manufacturing method of an air-pulse generating device is provided. The manufacturing method includes: providing a wafer including a first layer and a second layer; patterning the first layer of the wafer to form a slit with a zigzagging pattern; and removing a first part of the second layer. A portion of the first layer above the removed first part of the second layer forms a film structure. The slit with the zigzagging pattern separates the film structure into a first flap and a second flap. The slit with the zigzagging pattern zigzags in a back-and-forth manner among a first direction and extends toward a second direction. The air-pulse generating device produces a plurality of air pulses by actuating the film structure.

A method and electronic consumer device for creating an individual spatial listening zone for a user provided. The method includes receiving an input audio signal and processing it to generate first and second ultrasonic electric audio signals. The ultrasonic signals are provided to first and second ultrasonic transducers which convert them into directional ultrasonic acoustic signals. These signals are directed to a spatial listening zone where the user is located. Through non-linear interaction of the ultrasonic signals in air within the spatial listening zone, an audible sound signal is produced for the user that corresponds to the desired audio based on the input signal. The audible sound is substantially confined to the spatial listening zone and inaudible outside it. Various techniques for dynamically adjusting the spatial listening zone based on user position are disclosed. The system allows for creation of personalized audio experiences while minimizing disturbance to others nearby.

Techniques described herein generally relate to generating an audio signal with a speaker. In some examples, a speaker device is described that includes a membrane and a shutter and driver device is configured to receive an audio signal, modulate it and generate electric signals to operate the speaker and generate an acoustic audio signal.

A transducer includes: a film support portion having a hollow portion; a vibration film displaceable in a film thickness direction; a piezoelectric element, the piezoelectric element including a pair of electrodes and a piezoelectric film; and in regions overlapping the hollow portion, a plurality of first regions having a first total film thickness which is a sum of a film thickness of the vibration film and a film thickness of the piezoelectric element, and a plurality of second regions having a second total film thickness which is a sum of a film thickness of the vibration film and a film thickness of the piezoelectric element, the second total film thickness being different from the first total film thickness. The first regions and the second regions are alternately arranged, and one of the first regions is adjacent to a connection portion between the film support portion and the vibration film.

A textile enabling control related to sound output is to be provided. A textile according to the present application is characterized by being formed to include foil of an organic piezoelectric film.

An air-pulse generating device includes a film structure. The film structure is actuated such that the air-pulse generating device produces a plurality of air pulses. A horn-shaped outlet is formed within the air-pulse generating device, and the plurality of air pulses is propagated via the horn-shaped outlet.

A method and device for treating tinnitus and / or hearing impairment of a user at bedtime includes providing an audio stimulus to the user using a parametric array speaker. Some embodiments treat tinnitus by removing a frequency notch corresponding to the user's tinnitus frequencies from the audio signal. The audio signal may be ambient sound detected by a microphone, or may be a prerecorded file which may comprise noise or other audio such as audiobooks or music. Some embodiments combine treatment of tinnitus or hearing impairment with treatment for apnea, hypopnea or snoring.

Provided with a voice transmission device that can deliver clear voice to a user without invading the user and can be practically used. A voice transmission device 1 of the present disclosure includes: a transducer 2; a transmission plate 3 configured to transmit a mechanical vibration to a bone of a head of a person; a housing 4 that houses the transducer 2; and a ring member 7 arranged to cover a side surface of the housing 4. The transducer includes: a magnetostrictive element 21; permanent magnets 22a, 22b arranged at both ends of the magnetostrictive element 21; and a coil 23. The permanent magnet 22a arranged at one end of the magnetostrictive element 21 is connected to a transmission plate 3. The housing 4 includes: a housing portion 41 that houses the transducer 2; and a counter mass 42 connected to the permanent magnet 22b arranged at the other end. The ring member 7 holds a side surface of the housing 4 via a damper member 6.

The invention provides a sounder and a wearable sound device. The sounder comprises an airflow generator used for generating airflow, a first resonant cavity and a second resonant cavity. The second resonant cavity is stacked on the first resonant cavity. The sound is generated by the airflow generated by the airflow generator passing through the first resonant cavity and the second resonant cavity.

An acoustic system and an in-vehicle communication support system that increase the audible sound reproduction level of a parametric loudspeaker while mitigating disadvantages of ultrasonic radiation are provided. An ultrasonic wave amplitude-modulated with audible sound, emitted from a parametric loudspeaker enter an audible sound collector with a high directivity. Of incident ultrasonic wave and incident audible sound self-demodulated from the ultrasonic wave, the audible sound collector attenuates the ultrasonic wave, and reflects the audible sound to be collected at a position near the user. The audible sound collector can be composed of: a reflector having a reflecting surface formed of a paraboloid of revolution; and a sound absorber for absorbing an ultrasonic wave. The sound absorber can be composed of a sound absorbing material made of a phononic crystal, or of resonance tubes.

A reactive filter assembly comprising a reactive filter acoustically coupled to a transducer operable to generate an audio frequency by air nonlinearity demodulation of an ultrasonic frequency, wherein the reactive filter has a number of acoustic passes set to provide the transducer with a radiation impedance to improve the transducer efficiency.

The present invention discloses an antibacterial electric toothbrush and antibacterial method based on the principle of pulsed ultrasonic piezoelectric response. The electric toothbrush of the present invention includes a toothbrush head and a driving mechanism for driving the vibration of the toothbrush head, the driving mechanism being configured to generate low-intensity pulsed ultrasonic waves. The toothbrush head is equipped with a piezoelectric brush, and the ultrasonic vibrations enhance the electrical response of the piezoelectric brush, thereby achieving excellent antibacterial effects. The electric toothbrush of the present invention not only effectively inhibits bacteria in the toothbrush head when it is placed stationary, but also has improved antibacterial activity during tooth brushing, effectively inhibiting plaque and preventing oral diseases such as periodontal disease.

Provided in the present invention is a loudspeaker apparatus. The loudspeaker apparatus comprises: a support structure, the support structure comprising a support body provided with a sound generation cavity, and an annular sound hole formed at one end of the support body; an ultrasonic generation unit, the ultrasonic generation unit being located inside the sound generation cavity and fixed on the inner peripheral side of the support body, and being used for generating symmetrical ultrasonic waves; and a demodulation structure, the demodulation structure comprising a diaphragm and a plurality of fixing portions extending from the outer peripheral side of the diaphragm and distributed at intervals, wherein the fixing portions are fixed to the inner side of the sound hole and suspend the diaphragm in the sound hole, the diaphragm and the sound hole are spaced apart from each other and enclose a gap together with the fixing portions, and the ultrasonic waves generated by the ultrasonic generation unit drive the demodulation structure to vibrate, so as to adjust the size of the gap. Compared with the prior art, the loudspeaker apparatus of the present invention has a high acoustic demodulation efficiency, a good effect in increasing the amplitude of a vibration system, and a good acoustic performance.

Disclosed in the present invention are an antibacterial electric toothbrush based on a pulsed ultrasonic piezoelectric response principle, and an antibacterial method. The electric toothbrush in the present invention comprises a toothbrush head and a driving mechanism for driving the toothbrush head to vibrate, wherein the driving mechanism is configured to generate low-intensity pulsed ultrasonic waves, and the toothbrush head is provided with piezoelectric bristles and enhances the electric responsiveness of the piezoelectric bristles by means of ultrasonic vibration, such that a good antibacterial effect is achieved. The provided electric toothbrush can not only effectively inhibit the growth of bacteria on a standing toothbrush head, but also has improved antibacterial activity during a tooth-brushing operation process, such that dental plaque can be effectively inhibited, and oral diseases, such as periodontitis, can be effectively prevented.

The embodiments of the present disclosure provide an acoustic output device, including: a first piezoelectric element configured to generate vibrations based on an audio signal; a fixing structure configured to place the acoustic output device near a user's ear without blocking the user's ear canal, an end of the fixing structure being connected to one end of the first piezoelectric element; and a vibration transmission component including an ear hook and an output assembly, one end of the ear hook being connected to an end of the first piezoelectric element away from the fixing structure, the other end of the ear hook being connected to the output assembly, the output assembly receiving the vibrations of the first piezoelectric element through the ear hook and outputting sound, and a frequency response curve of the sound having at least two resonant peaks.

We provide an "acoustic system and in-vehicle communication support system" that increases the audible sound playback level while suppressing the disadvantages of ultrasonic radiation using a parametric speaker. [Solution] Ultrasound amplitude-modulated by audible sound emitted from a parametric speaker 1 is incident with high directionality on an audible sound collector 2. Of the incident ultrasound and audible sound self-demodulated from the ultrasound, the audible sound collector 2 attenuates the ultrasound and reflects the audible sound to collect it at a position near the user. The audible sound collector 2 can be composed of a reflector 21 with a reflective surface of a paraboloid of revolution and a sound absorber 22 that absorbs the ultrasound, and the sound absorber 22 can be composed of a sound-absorbing material using phononic crystals or a resonance tube 221.

The invention discloses an air pulse generating device. The air pulse generating device comprises a chamber, a modulation part and a demodulation part, wherein the modulation part is used for generating amplitude modulation ultrasonic waves in the chamber, and the demodulation part is used for generating a plurality of ultrasonic pulses according to the amplitude modulation ultrasonic waves in the chamber. The demodulator periodically forms an opening at a frequency, which is an operating frequency of the modulator. The opening communicates air within the chamber to the ambient environment. The amplitude of the amplitude modulation ultrasonic wave is generated according to an input signal. The plurality of ultrasonic pulses correspond to an input signal.

The present invention relates to the technical field of electroacoustics, and in particular to an ultrasonic loudspeaker comprising: a magnetic circuit system for providing the loudspeaker with a magnetic field; a frame provided in a hollow way, the magnetic circuit system being fixed in the frame; an FPC lapped and fixed on the frame, a portion of the FPC in a hollow portion of the frame being elastic; a diaphragm attached and fixed to the FPC in parallel; a voice coil with a top fixed to the FPC and a remaining portion extending into the hollow portion of the frame; and an ultrasonic driver fixed to the FPC and attached and connected to the diaphragm. When powered, the voice coil drives the diaphragm via the FPC to generate first sound pressure while the ultrasonic driver produces second sound pressure, their combination forming ultrasonic grade frequency response for high-resolution audio reproduction.

A hybrid sound radiating device according to the invention is used to vibrate a heavy rigid plate at audio frequencies. The device comprises two voice coils arranged concentrically, the outer voice coil being coupled to a fluid reservoir containing a medium including three fluids with a substantially constant viscosity depending on the frequency. A third coil is arranged around the side wall of the fluid reservoir, and two electrodes with opposite polarity are provided in the fluid reservoir to provide a substantially constant electric field in the fluid reservoir. The device further comprises a vibrating element in the form of a heavy rigid plate rigidly connected to the fluid reservoir, and a control circuit connected to the first, second and third coils and to the electrodes.

The invention relates to an amplified reactance filter for transducer ultrasound. A reactance filter assembly includes a reactance filter acoustically coupled to a transducer operable to generate an audio frequency by air non-linear demodulation of an ultrasonic frequency, the reactance filter having a plurality of auditory conductive pathways tuned to introduce a radiation impedance to the transducer, therefore, the efficiency of the transducer is improved.

The present disclosure discloses a speaker including at least one ultrasound unit, including: a bottom ultrasound component, a plurality of displacement assemblies. The displacement assembly includes a displacement component mounted on the bottom ultrasound component, and a resonance component. The resonance component including at least one Helmholtz resonance chamber is configured to resonate by way of vibration of the displacement component for changing a volume of each of the at least one Helmholtz resonance chamber. An ultrasonic signal emitted by the bottom ultrasound component is demodulated to a low frequency signal in the at least one Helmholtz resonance chamber. The low frequency signal is transmitted to outside through the sound output channel.

A reactive filter assembly comprising a reactive filter acoustically coupled to a transducer operable to generate an audio frequency by air non-linearity demodulation of an ultrasonic frequency, the reactive filter having a number of acoustic pathways tuned to introduce a radiation impedance to the transducer that improves transducer efficiency.