369 results about "Low-pitched" patented technology

An elongate medical device includes a sensor configured to detect one or more characteristics of an electromagnetic field in which the device is disposed. The sensor includes an electrically-insulative substrate, rectangular in shape, and a patterned, conductive trace disposed on the substrate. The patterned trace includes a plurality of diagonal sections parallel to one another, arranged with a relatively low pitch. The substrate is wrapped into a cylindrical shape thereby forming a three-dimensional spiral capable of functioning as a micro-electromagnetic sensor. A medical positioning system is responsive to the signal from the sensor to determine a position and/or orientation of the sensor.

A computerized interactor system uses physical, three-dimensional objects as metaphors for input of user intent to a computer system. When one or more interactors are engaged with a detection field, the detection field reads an identifier associated with the object and communicates the identifier to a computer system. The computer system determines the meaning of the interactor based upon its identifier and upon a semantic context in which the computer system is operating. One specific embodiment of the present invention is a bead interactor system that is a user playable sound and light show system. When an interactor bead is positioned within the detection space of the bead interactor system, a sound sequence begins and continues to play unaltered until the bead interactor is removed or other bead interactors are positioned within or removed from the detection space. Each bead represents a different sound and the row and column location of the bead within the detection space controls how the sound is modified, e.g., louder or softer, higher pitched or lower pitched, the period of play, etc. In some embodiments, the beads are translucent in order to conduct light from light sources located under each bead receptacle. The available sounds are determined not only by the identity of the beads and their positioning within the detection space and their associated states or orientations, but also by sound data stored in an accompanying computer readable medium. Hence a user can access a variety of sound collections by simply installing a different computer readable medium.

In a vocoder system, the receiver is arranged to emphasize at least the fundamental or lowest-frequency sinusoidal signal in response to the pitch, in a manner which provides more emphasis at lower pitch values, corresponding to larger pitch intervals. The emphasis provides a subjectively improved speech synthesis. In a preferred embodiment, the enhancement takes place at fundamental component frequencies below 400 Hz. According to another aspect of the invention, the second and third harmonics are also emphasized, but generally not as much as the fundamental component. Below certain frequencies, the enhancement is limited for the fundamental and the harmonics.

The invention discloses a six-wheel-leg type serial-parallel hybrid robot. The robot comprises a carrying platform, a battery, a control system, a camera and three wheel-leg combined movable branched chains with six degrees of freedom; the battery, the control system and the camera are arranged on the carrying platform; the wheel-leg combined movable branched chains are arranged under the carrying platform; and the wheel-leg combined movable branched chain comprises a yaw joint, a yaw joint bracket, an upper pitch joint, a big leg, a middle pitch joint, a middle pitch joint bracket, an upper roll joint, a small leg, a lower pitch joint, a lower pitch joint bracket, a lower roll joint, a power wheel bracket and a power wheel. The invention provides the six-wheel-leg type serial-parallel hybrid robot with a simplified structure and good flexibility and rapidity.

A stand on which a flat panel display main body is placed has low-pitched sound speakers built therein and a speaker of the flat panel display main body and the low-pitched sound speakers of the stand are combined together to construct a powerful sound system with large sound volume. The low-pitched sound speakers are located at the back side of the flat panel display main body when the flat panel display main body is placed on the stand. In a flat panel display apparatus composed of the flat panel display main body having the speaker built therein and the stand supporting this flat panel display main body thereon, it is possible to easily realize a powerful sound system using the low-pitched sound speakers (woofers) without requiring any extra space.

A sound pickup device, which is arranged in proximity to a percussion instrument (e.g., a bass drum), comprises a diaphragm stretched under tension over an opening of a shell having a cylindrical shape, and an electroacoustic transducer arranged inside of the shell. The electroacoustic transducer comprises a magnetic transducer or a speaker unit. Herein, the percussion instrument is played to produce the low-pitch sound, which is transmitted to the diaphragm to vibrate so that the electroacoustic transducer is activated to convert the low-pitch sound into an electric signal, based on which the low-pitch sound is reproduced by a sound system with a high fidelity to the original sound.

The invention discloses an electromagnetic excitation energy converter, a laser projection optical sound screen, and a synchronous display method thereof, and relates to the technical field of the image display and the acoustics. A hard or flexible laser projection optical screen is used as display and sound production of a sound production component, the electromagnetic excitation energy converter is used for pushing the screen or an auxiliary sound production board to vibrate the same, thereby forming an acoustic output; a low pitch enhancing unit, a middle pitch enhancing unit and high pitch enhancing unit are further provided, and the graceful tone quality capable of covering the full frequency bands can be played through the processing of a power amplifier and a frequency divider; andthe sound-picture synchronization technology can be achieved through a specific algorithm and software processing. Through the scheme disclosed by the invention, the vibration amplitude of the screencan be controlled to be imperceptible by the human eye while the screen is vibrated to excite the sound production, thereby guaranteeing that the display picture cannot be interfered, and a laser projection optical sound screen system scheme capable of displaying excellent picture and playing the beautiful sound is formed, the problem that the traditional box type sound group is large in volume,inconvenient for use, and separated in picture display and sound is solved, and the audio visual experience demand of the user is satisfied.

Musical sound signals in at least one frequency band in a low band range are enhanced by a low-pitched sound enhancement processing device. Musical sound signals greater than a predetermined level are compressed by a compression device, such that the level in a low band range would not become excessively large, while musical sound signals with a lower level are enhanced by an enhancement device to be outputted with sufficient sound pressure. Also, the input/output level ratio is determined based on the level of inputted musical sound signals, to prevent the output level from becoming smaller than the input level.

The present invention is directed to an audio signal reproducing system comprising a speaker system including at least two drive units or more which are divided or separated by frequency band. In this system (1), a signal processing unit (3) serves to add inverse characteristic to an inputted digital audio signal as correction characteristic of impulse response of speaker system (7). Thereafter, a D/A converter converts the digital audio signal thus obtained back into an analog signal. A power amplifier (5) amplifiers the analog signal thus obtained to deliver the analog signal thus amplified to the speaker system (7). The speaker system (7) outputs a signal at low frequency band that a LPF (8) has passed as sound wave of low pitched sound from drive surface (9a) of a low frequency drive unit (9), and outputs a signal at high frequency band that a HPF (10) has passed as sound wave of high pitched sound from drive surface (11a) of a high frequency drive unit (11).

A method for searching a building roof facet and reconstructing a roof structure line, in which the searching is performed automatically and without limitation of how slope of the roof facet, and the building structure line is constructed through aerial imagery. At first, lidar point clouds on the roof are extracted to compose a roof facet by using coplanarity analysis, and the roof is differentiated to a possible flat roof and a pitched roof. An optimal roof facet is obtained by analyzing lidar point clouds to overcome the low pitched facet issue. A relationship of a roof facet on a 2-dimensional space is analyzed to ascertain an area of a roof structure line. An initial boundary is generated. Line detection is performed on the images and a roof structure line segment is composed. All the structure line segments are used to reconstructing a 3-dimensional building pattern in object space.

The invention provides an intelligent control device and control method for an automobile horn. The intelligent control device comprises an automobile horn key control, a global positioning system (GPS) positioning/timing system, an automobile horn, a geographical spatial database system, an automobile horn sounding control module, an intelligent horn control system and the like, wherein the intelligent horn control system recognizes section/time interval information intelligently and controls the sounding and the volume of the automobile horn according to whistle control time intervals and whistle area information set on related portions. According to the intelligent control device and control method, automatic control of silence, the low pitch and the high pitch of the automobile horn is achieved according to positions and current time as well as whistle control regulations specified by relevant departments; noise pollution generated by automobile horns due to disordered whistling, tweeter whistling and the like can be controlled effectively; and traffic violation acts can be eradicated fundamentally simultaneously.

The invention discloses an earphone which comprises a loudspeaker single body, an audio signal line electrically connected with the loudspeaker single body, a shell used for containing the loudspeaker single body and a front cover laid on the shell. A front acoustic cavity is formed in the space between the front cover and the loudspeaker single body, and a rear acoustic cavity is formed in the space between the shell and the loudspeaker single body; the rear acoustic cavity is divided by a dividing wall into a main rear cavity and a low-pitch rear cavity, an acoustic tube is laid in the cavity body of the low-pitch rear cavity, is bent in a curve shape and arranged in the cavity body of the low-pitch rear cavity, one end of the acoustic tube is connected with the main rear cavity through a through hole of the dividing wall, and the other end of the acoustic tube is communicated with the outside through a sounding hole in a shell of the low-pitch rear cavity. By means of the structure, low-frequency performance and medium-frequency performance of the earphone are effectively improved, and the appearance of the earphone is more attractive on the basis that stability of the earphone is guaranteed.

The invention discloses a piezoelectric speaker based on a piezoelectric cantilever beam, belonging to the technical filed of piezoelectricity. The piezoelectric speaker is structured by bonding an upper layer piezoelectric ceramic piece and a lower layer piezoelectric ceramic piece of opposite polarization directions at both sides of a middle layer fiber sheet, thereby forming a piezoelectric cantilever beam; one end of the piezoelectric cantilever beam is fixed with an external frame so as to form a fixed end from which electrodes are led out; the movable end of the piezoelectric cantilever beam is connected with a vibration sheet by a link block with a damp function; and the vibration sheet is bonded to the external frame through a vibration film. The vibration sheet can serve as the main medium for driving air around the speaker and also the counter weight of the speaker, can reduce the first-order resonance frequency of the speaker effectively, and improve the effect of low pitch replay. The piezoelectric speaker provided by the invention has the characteristics of low resonance frequency, simple vibration mode and large vibration range and the like, and has the advantages of good low pitch performance, stable sound pressure output and high sound output and the like compared with a conventional surface mount type piezoelectric speaker.

An earphone with tunable low pitch comprises a main member and a stirring member, wherein the main member has a chamber inside receiving a loud speaker, a low pitch room formed between the main member and the loud speaker, at least a fixing air hole provided at the rear side of the main member, a high pitch room formed between the front side of the main member and the loud speaker, at least a regulative air hole is provided at the high pitch room; the stirring member, which is pivotally joined to the pivot hole, is designed as a disk to close the regulative air hole or as airflow baffles to close corresponding airflow passages gradually such that the regulative air hole or the airflow passages can be partly or fully blocked by the stirring member to change the speed of the air entering or leaving the high pitch room and result in good low frequency resonant effect.

A deer call assembly that mimics sounds ranging from the high pitched sounds of fawns and does to the low-pitched grunts of bucks. The pitch is infinitely adjustable over a range with a slide actuator that manipulates a band restraint that captures a reed to a longitudinally grooved tone board. An arcuate, grooved collar depends to capture the O'ring. The reed is rigidly secured to the tone board at one end with a peg. A preferred reed exhibits peripheral edges that taper outward as the reed extends to a wide billed end where the edges project beyond the longitudinal sides of the tone board.

The present invention discloses an improved single magnetic circuit dual output speaker, comprising a support retainer with an expanded opening at its front end, a bridge disposed across the opening, a magnetic circuit wound and fixed inwardly in the middle of the bridge, a vibrating space disposed on each of both sides of the magnetic circuit, a first voice coil disposed in the vibrating space on one side of the magnetic circuit, a second voice coil disposed in the vibrating space on the other side of the magnetic circuit, a first diaphragm disposed on the expanded opening of the support retainer and having its internal diameter stuck with the first voice coil, a second diaphragm disposed on the expanded opening of the support retainer and having its internal diameter stuck with the second voice coil, and a damper disposed at the back of the support retainer and stuck with the first voice coil, such that the magnetic circuit is mounted at the front of the support retainer by the bridge to provide the dual outputs of high and low pitches by a single body structure, and the bridge can be used to facilitate its holding during assembling and maintenance.

The invention relates to a sound box module and especially relates to a loudspeaker and a manufacturing method thereof. Sound is generated by the loudspeaker in a manner of generating mechanical vibration under an action of an electromagnetic force. The loudspeaker comprises a sound box module which comprises a horn, a driven radiator and a sound box panel, wherein a mounting hole is formed on the sound box panel; the horn is arranged at the mounting hole and is integrally formed with the sound box panel in the manner of embedding ejection; a secondary mounting hole is formed on the sound box panel on one side of the mounting hole; and the driven radiator is arranged in the secondary mounting hole and is integrally formed with the sound box panel in the manner of embedding ejection. The loudspeaker has the advantages of small volume, small thickness, simple structure and enhanced low pitch. The loudspeaker can be used as a built-in loudspeaker or an external loudspeaker of a modern panel personal computer or intelligent mobile phone, and the like. In order to ensure an excellent sound effect of the sound box, an embedding ejection integrating manufacturing process is adopted, thereby maximally ensuring the sound effect of the sound box, greatly shortening the working time and promoting the production efficiency.

Approaches for reconstructing multi-phase images are disclosed. In certain embodiments, calibrated X-ray projection data acquired over at least a partial axial or low-pitch helical rotation is accessed and used to reconstruct one or more initial images. A frequency transform is performed on the images to generate respective frequency domain representations. Elements of the frequency domain representations are weighted based on at least the difference between the phase associated with the elements and a specified phase of interest. The weighted frequency domain representations are combined to generate a frequency domain representation at the phase of interest, which can be used to generate an image at the phase of interest.

The invention relates to a thin double-cone phase inversion type loudspeaker box. A box body is mainly composed of a lower shell and an upper shell, wherein a high pitch unit installing hole, a low pitch unit installing hole and a lower shell phase inversion hole are formed in the lower shell, the high pitch unit installing hole and the low pitch unit installing hole are distributed along the long axis direction and are located in the left half portion of the lower shell, the high pitch unit installing hole is close to the left end of the lower shell, the lower shell phase inversion hole is arranged along the long axis direction and is located in the right half portion of the lower shell, and an opening of the lower shell phase inversion hole is located in the right end of the lower shell. A high pitch unit positioning groove, a low pitch unit positioning groove and an upper shell phase inversion hole are formed in the upper shell, wherein the lower shell and the upper shell constitute the box body. A high pitch loudspeaker unit is arranged in the high pitch unit installing hole and the high pitch unit positioning groove, and a subwoofer unit is arranged in the low pitch unit installing hole and the low pitch unit positioning groove. An inverter tube is formed by corresponding combination of the lower shell phase inversion hole and the upper shell phase inversion hole. The thin double-cone phase inversion type loudspeaker box is ingenious and reasonable in structure, and pretty good low frequency tone quality is achieved under the condition that the thin structure of the loudspeaker box is guaranteed.