186results about "Contact microphone transducers" patented technology

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.

A rear panel, which is an external member, includes a frame portion including multiple sound radiation holes including a first sound radiation hole, a second sound radiation hole, and a third sound radiation hole. A first sloping portion is disposed within an area of the first sound radiation hole and is inclined with respect to a thickness direction of the frame portion towards a first direction non-parallel to the thickness direction, and a second sloping portion is disposed within an area of the second sound radiation hole and is inclined with respect to the thickness direction of the frame portion towards a second direction different from the first direction and non-parallel to the thickness direction, and the third sound radiation hole includes a surface parallel to the thickness direction of the frame portion.

A vibration sensor (200) is provided, comprising: a vibration receiver (210) including a housing (211) and a vibration unit (212), the housing (211) forming an acoustic cavity, the vibration unit (212) being located in the acoustic cavity and separating the acoustic cavity into a first acoustic cavity (213) and a second acoustic cavity (214); and an acoustic transducer (220) acoustically connected to the first acoustic cavity (213). The housing (211) is configured to generate a vibration based on an external vibration signal, the vibration unit (212) changes an acoustic pressure within the first acoustic cavity (213) in response to the vibration of the housing (211), causing the acoustic transducer (220) to generate an electrical signal. The vibration unit (212) includes a quality element (2121) and an elastic element (2122), an area of the quality element (2121) on a side away from the acoustic transducer (220) is smaller than an area of the quality element (2121) on a side close to the acoustic transducer. The elastic element (2122) is connected around a side wall of the quality element (2121).

Vibration sensors are provided. The vibration sensor may include: a vibration assembly, the vibration assembly including a mass element and an elastic element, and the mass element being connected to the elastic element; a first acoustic cavity, the elastic element constituting one of sidewalls of the first acoustic cavity, and the vibration assembly vibrating to make a volume of the first acoustic cavity change in response to an external vibration signal; an acoustic transducer, the acoustic transducer being in communication with the first acoustic cavity and the acoustic transducer generating an electrical signal in response to a volume change of the first acoustic cavity; and a buffer, the buffer limiting a vibration amplitude of the vibration assembly, wherein the acoustic transducer has a first resonance frequency, the vibration assembly has a second resonance frequency, and the second resonance frequency of the vibration assembly is smaller than the first resonance frequency.

The present invention provides a polymer-based piezoelectric composite material from which a piezoelectric film capable of outputting a higher sound pressure and exhibiting excellent flexibility even in a low-temperature environment is obtained in a case of using a piezoelectric speaker, a piezoelectric film formed of the polymer-based piezoelectric composite material, and a piezoelectric speaker and a flexible display which are formed of the piezoelectric film. The polymer-based piezoelectric composite material of the present invention is a polymer-based piezoelectric composite material including a polymer matrix which contains a polymer containing a group represented by Formula (1), and piezoelectric particles.*-L1-(CR1R2)n—CN  Formula (1)In Formula (1), L1 represents a divalent linking group excluding a urethane group. R1 and R2 each independently represent a hydrogen atom, an alkyl group, or an aryl group. n represents an integer of 3 or greater. * represents a bonding position with respect to the main chain of a polymer.

A method and apparatus for monitoring vehicle window vibrations for voice command recognition are disclosed. An exemplary vehicle includes a vehicle window; an exterior panel; a vibration sensor coupled to the vehicle window to detect audio vibrations; an audio actuator coupled to the exterior panel to vibrate the exterior panel; and a controller. The controller is configured to detect a voice command from a user via the vibration sensor, identify an audio response based on the voice command, and transmit the audio response to the user via the audio actuator.

An abnormal noise reproduction device and an abnormal noise reproduction method thereof are provided in the disclosure. The abnormal noise reproduction device includes at least one measuring device, an analysis device, and a vibration device. The at least one measuring device includes a contact microphone and an accelerometer. The contact microphone is disposed on the abnormal noise generating part of a vehicle, senses vibration sound of the abnormal noise generating part, and generates a vibration sound signal. An acceleration signal is generated by synchronously sensing acceleration of the contact microphone over a time sequence through the accelerometer. The analysis device determines when the abnormal noise generating part produces abnormal noise according to the vibration sound signal. The vibration device applies vibration to the vehicle and reproduces the acceleration signal corresponding to the abnormal noise.

The acoustic transducer includes a first layer including an elastomer. The acoustic impedance of the first layer substantially matches the acoustic impedance of a medium the transducer is configured to monitor. The transducer also includes a second layer including an electrode. The transducer also includes a third layer including a polymer. The second layer is at least partially positioned between the first and third layers.

A stethoscope head includes a shell, the shell including a first portion that is open on one side and contracted on the other side, and a second portion located on one side of the first portion, the shell being formed by integral metal stamping; a core member located inside the shell and including a fourth portion that closely fits the inner wall of the second portion of the shell; and a connector that is a hollow tube extending from the outside of the shell into the space in the middle of the core member, the space in the middle of the core member being connected to the sound pickup space of the stethoscope head. The stethoscope head using the above structure has a simple structure, is easy to manufacture, and is simple to assemble, and is particularly suitable for use as a disposable stethoscope head.

A bone conduction microphone is provided. The bone conduction microphone may include a laminated structure formed by a vibration unit and an acoustic transducer unit. The bone conduction microphone may include a base structure configured to carry the laminated structure. At least one side of the laminated structure may be physically connected to the base structure. The base structure may vibrate based on an external vibration signal. The vibration unit may be deformed in response to the vibration of the base structure. The acoustic transducer unit may generate an electrical signal based on the deformation of the vibration unit. The bone conduction microphone may include at least one damping structural layer. The at least one damping structural layer may be arranged on an upper surface, a lower surface, and / or an interior of the laminated structure, and the at least one damping layer may be connected to the base structure.

A device for performing active auscultation.SOLUTION: A main body, a body mounting structure, and one or more wings, wherein the main body comprises a memory, a battery, an IMU, a transceiver, and a DSP; Wherein the one or more wings comprise a microphone wing and a speaker wing, wherein the microphone wing comprises one or more microphones, wherein the speaker wing comprises a speaker, wherein the one or more wings comprise a temperature sensor, wherein the main body is configured to engage with the body attachment structure, and wherein the body attachment structure is configured to engage with the main body on a first side and an animal body on a second side.SELECTED DRAWING: Figure 3A

An audio transmitter (8) for a guitar comprises an electrochemical energy storage device (13) for supplying the audio transmitter (8) with the electrical energy required for operation, a microphone (14) for converting the guitar sound into an electrical audio signal, a radio module (11) for transmitting the audio signal, and a mounting bracket (16.1) for attaching the audio transmitter (8) to an edge of a soundhole of the guitar such that the microphone (14) is located in the body of the guitar. Furthermore, an audio radio system (1) with such an audio transmitter (8) is included.

The utility model relates to a sound pickup technology for an acoustic musical instrument, in particular to an array type sound pickup for the acoustic musical instrument, which comprises an integral array type sound pickup set consisting of a plurality of single sound pickups with different sizes. The single sound pick-up is formed by arranging a piezoelectric ceramic piece in an open type stamping aluminum alloy cavity shell, and the surface of the piezoelectric ceramic piece is covered with 0.3-0.5 mm silicone rubber for sealing. The sound pick-up is installed on a frequency resonance point of a sound production panel in the original sound musical instrument through a flexible double faced adhesive tape. The sound pick-up frequency range and the signal intensity can be expanded in the physical level by combining sound pick-ups with different sizes. The sound pickup device picks up the sound of the acoustic musical instrument with high quality, and provides a high-quality acoustic solution for the acoustic musical instrument in the fields of stage performance, studio recording and the like.

The present disclosure provides communication systems and devices for use in noise environments, such as during magnetic resonance imaging (MRI). In some embodiments, a communication headrest is provided that consists of a headrest that supports a patients' head, an optional bone conduction microphone, and one or more vibration actuators. The headset makes contact with noise-isolating earplugs worn by the subject such that vibrations generated by the vibration actuators are transferred through the earplug, via acoustic conduction, to enable the patient to hear audio content while the earplugs provide passive noise protection by occluding the ear canal. In other embodiments, active earplug devices are provided in which an acoustic transducer is contacted and supported by a noise isolating earplug, such that when the earplug is inserted into the ear canal, the acoustic transducer is brought into acoustic conductive communication with tissue surrounding the ear canal, facilitating acoustic communication through bone conduction.

An headphone is provided. The headphone includes a housing assembly, an interface assembly, and a wire assembly. The housing assembly includes a first housing, the first housing being provided with a receiving slot and an accommodation cavity in communication with the receiving slot; an interface assembly inserted within the receiving slot; a circuit board disposed within the accommodation cavity; and a wire assembly electrically connecting the circuit board and the interface assembly. In the manner disclosed above, a freedom of a mounting position and a mounting posture of the interface assembly may be improved, which facilitates the assembly of the headphone.

An electronic stethoscope includes a diaphragm that comes into contact with a living body, a sound sensor that receives vibration from the diaphragm and converts the vibration into an electric signal, and a tubular member that includes an inner wall surface to define an internal space. The tubular member includes a first inner wall surface that defines a first space, a second inner wall surface that defines a second space, and a boundary portion where the first inner wall surface is in contact with the second inner wall surface. A volume of the first space is larger than a volume of the second space. A cross-sectional area of a transverse section of the internal space is gradually decreased from a diaphragm side end toward the boundary portion in the first space and is gradually increased from the boundary portion toward a sound sensor side end in the second space.

The utility model discloses a stainless steel electric guitar convenient to drink water, which comprises a guitar body, a sound pick-up is arranged on the front surface of the guitar body, a connecting plate is arranged on the side surface of the guitar body, a water drinking mechanism is arranged in the connecting plate, a fixing mechanism is arranged on the upper surface of the guitar body, one end of the guitar body is fixedly connected with a finger plate, and the other end of the guitar body is fixedly connected with the finger plate. One end of the fingerboard is fixedly connected with a guitar head, the outer side wall of the guitar body is fixedly connected with a connecting column, the connecting column is fixedly connected with a limiting rope, and one end of the limiting rope is connected with the water drinking mechanism. According to the utility model, drinks can be carried in the cup, so that a player can drink water and supply water in time during playing. When drinking water needs to be carried, the limiting scribing piece is moved away, and the water storage tank can be taken out of the fixing groove by contacting limitation of the limiting scribing piece on the water storage tank. And then the sealing cover is taken down, and water is injected. And then the water storage tank is placed in the fixing groove, so that the water storage tank is fixed by the positioning sheet in the fixing groove. When water needs to be drunk, the water storage tank can be taken out for drinking.

Whistling / wheezing detection device (1) for detecting whistling / wheezing based on a sound measured from a living body while the whistling / wheezing detection device (1) is in contact with a body surface (S) of the living body, wherein the whistling / wheezing detection device (1) comprises the following: a noise measuring element (M1, M2); a space-forming element (30, 33, 34, 35, 350) that forms a recording space (SP1) which accommodates the noise measurement element (M1, M2); and a cover element (36) that forms a pressure receiving unit (3a) which closes the receiving chamber (SP1) and receives pressure from the body surface (S), wherein the space-forming element (30, 33, 34, 35, 350) has a hole section (40) that is connected to an atmosphere, the recording chamber (SP1) is connected to the atmosphere via the hole section (40), and the hole section (40) includes a branching section (BR1 to BR3) between an inlet (41) on one side of the receiving space (SP1) and an outlet (49) on one side of the atmosphere and two branched hole sections (44, 46) that branch off from one side of the inlet at the branching section (BR1 to BR3), one branched hole section (46) of the two branched hole sections (44, 46) is connected to the outlet (49) and the other branched hole section (44) of the two branched hole sections is closed.

The electronic processing device for an acoustic apparatus including a first air conduction microphone and a second bone conduction microphone, configured for being connected to the first and second microphones, for receiving as inputs the first and respectively second analog signals from the first, and respectively second microphones and for delivering as output a corrected signal.The processing device comprises:a hybridization module configured for calculating a hybrid signal from the first and second analog signals;an estimation module configured for estimating noise in the hybrid signal;a noise reduction module configured for calculating the corrected signal by applying a generalized spectral subtraction algorithm to the hybrid signal and according to the estimated noise.

A bone conduction microphone is disclosed. The bone conduction microphone includes a circuit board, a housing engaged with the circuit board, a metal cover engaged with the circuit board for forming a first cavity, a vibration assembly, and a MEMS chip disposed in the first cavity. The metal cover includes a top wall and a side wall. The vibration assembly engages with the top wall for forming a second cavity and includes a vibration member and a spacer member. A first conduction cavity is formed by the housing, the vibration assembly, the metal cover and the circuit board. A vibration of the vibration member is transmitted to one side of the MEMS chip through the first conduction cavity, an acoustic channel of the circuit board and a back cavity of the MEMS chip. The bone conduction microphone reduces the electromagnetic interference and improves the SNR.

The present disclosure discloses a housing; a monolayer circuit board engaged with the housing for enclosing a receiving space, and including an acoustic channel; a vibration assembly received in the receiving space, dividing the receiving space into a first cavity and a second cavity; and a MEMS chip including a back cavity, received in the second cavity enclosed by the vibration assembly and the circuit board, and mounted on the circuit board; the acoustic channel is configured to connect the first cavity with the back cavity; an airflow generated by the vibration of the vibration assembly is transmitted to one side of the MEMS chip through the first cavity, the acoustic channel and the back cavity successively; the airflow is transmitted to the other side of the MEMS chip through the second cavity. The bone conduction microphone in the present disclosure has low height and higher sensitivity.

The bone conduction acoustic transmission device of the present application includes a laminated structure formed of a vibration unit and an acoustic conversion unit, and a base structure configured to place the laminated structure and physically connected to at least one side of the laminated structure, wherein 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 conversion unit generates an electrical signal based on the deformation of the vibration unit.

A high-quality voice signal processing device through removal of ambient noise based on multi-sensor signal fusion, includes: a voice microphone sensor that senses and outputs a speaker's voice signal; an accelerometer sensor that senses vibration of the speaker's vocal cords and outputs a signal; a noise reduction processing MCU that extracts a voice section according to vocal cord vibration using the output signal of the accelerometer sensor, synthesizes a low-frequency component of the accelerometer sensor and a low-frequency component of the voice microphone sensor at different synthesis ratios based on a level of noise extracted from the output signal of the voice microphone sensor using voice section information, and restores and outputs a voice signal by adding the synthesized low-frequency components and a high-frequency component of the voice microphone sensor; and a wireless communication module that externally outputs the restored voice signal.

A combined retro qin. Relate to a kind of national musical instrument, more particularly to a kind of structural improvement of combined retro qin. It include: resonance box, neck, the neck is fixedly connected with the end of resonance box;Fingerboard, the fingerboard is fixedly arranged above resonance box, one end is fixedly connected with the resonance box, the other end is fixedly connected with neck;Lower bridge, the lower bridge is fixedly arranged at the top of resonance box, for conducting the vibration energy of string;And tuning mechanism, several strings are tightened on lower bridge by tuning mechanism. The resonance box includes: resonance box side wall, resonance box panel, the resonance box panel is fixedly arranged at the top of resonance box side wall;And resonance box bottom plate, the resonance box bottom plate is fixedly arranged at the bottom of resonance box side wall, and is provided with sound hole. The present application improves the use experience, reduces the difficulty of string installation and replacement, the string stability is better, tuning is more convenient and accurate, and is beneficial to popularization and dissemination.

Small form-factor MEMS devices and methods of using the devices. An exemplary MEMS device includes an ACM. Certain devices comprise nanometer scale sensing gaps in the out-of-plane direction to increase vibration sensitivity in a vacuum casing. Certain devices described herein provide a differential sensing mechanism. Accelerometer contact microphones having an operational bandwidth ranging from 0 Hz and 10,000 Hz are also disclosed. The vibration acceleration sensitivity of certain devices described herein is better 100 μg√Hz.

Voice command recognition and natural language recognition are carried out using an accelerometer that senses signals from the vibrations of one or more bones of a user and receives no audio input. Since word recognition is made possible using solely the signal from the accelerometer from a person's bone conduction as they speak, an acoustic microphone is not needed and thus not used to collect data for word recognition. According to one embodiment, a housing contains an accelerometer and a processor, both within the same housing. The accelerometer is preferably a MEMS accelerometer which is capable of sensing the vibrations that are present in the bone of a user as the user is speaking words. A machine learning algorithm is applied to the collected data to correctly recognize words spoken by a person with significant difficulties in creating audible language.

A bone conduction microphone, comprising: a circuit board, which has an acoustic channel; a housing, which is connected to the circuit board in a covering manner to form an accommodating space; a metal cover, which is arranged in the accommodating space and is connected to the circuit board in a covering manner to form a first cavity, wherein the metal cover comprises a top wall spaced apart from the circuit board and a side wall located between the top wall and the circuit board; a vibration assembly, which is arranged in the accommodating space and is connected to the top wall in a covering manner to form a second cavity, wherein the vibration assembly comprises a vibration member spaced apart from the top wall and a spacer located between the vibration member and the top wall, and the housing, the vibration assembly, the metal cover and the circuit board enclose to form a first conduction cavity; and an MEMS chip, which is arranged in the first cavity and is fixed to the circuit board, wherein the MEMS chip has a back cavity, the acoustic channel communicates the first conduction cavity with the back cavity, and vibration of the vibration member is conducted to one side of the MEMS chip through the first conduction cavity, the acoustic channel and the back cavity. The bone conduction microphone can reduce the impact of electromagnetic interference and improve the signal-to-noise ratio.

Disclosed is an audio signal processing method, including measuring a voice signal by internal and external sensors. The internal sensor measures voice signals that propagate internally to the user's head. The external sensor measures voice signals that propagate externally to the user's head. The internal and external sensors produces first and second audio signals, respectively. The method further includes: processing the first audio signal to produce a first audio spectrum on a frequency band; processing the second audio signal to produce a second audio spectrum on the frequency band; computing a first cumulated audio spectrum by cumulating first audio spectrum values; computing a second cumulated audio spectrum by cumulating second audio spectrum values; determining a cutoff frequency by comparing the first and second cumulated audio spectra; and producing an output signal by combining the first audio signal and the second audio signal based on the cutoff frequency.

The present invention provides a sound transmission assembly and a sound transmission method for transmitting speech uttered by a user wearing a breathing apparatus mask for one or more sound applications. [Solution] A sound transmission assembly (100) for a respiratory device, comprising a mouth-covering mask (10) worn by the user of the respiratory device, the sound transmission assembly (100) comprising: at least one vibration sensor assembly (110) that generates an audio signal based on vibrations detected on the outer surface of the mask (10); a sound application assembly (130) that applies the audio signal obtained from the at least one vibration sensor assembly (110); and a sound processing unit (120) that preprocesses the audio signal obtained from the vibration sensor assembly (110) before passing it to the sound application assembly (130) for application.

A sound capture system can include a sound capture device configured for placement within a sound-generating device. The sound capture system can include a suspension system configured to suspend the sound capture device within the sound-generating device. The suspension system acoustically decouples the sound capture device from the sound-generating device. The sound capture device includes a plurality of transducers configured to generate a plurality of audio signals concurrently from sound generated by the sound-generating device. In another aspect, the sound capture system includes a signal processing circuit.