556 results about "High pitch" patented technology

A technique for enhancing audio signals generated from compressed digital audio files is described. The technique uses a Bass Maximizer module, a Harmonic Exciter module and a Quasi Stereo module. The Bass Exciter module enhances the intensity, depth and punch of the bass audio content by creating harmonic sequences from low frequency components contained in the original input signal. The Harmonic Exciter module adds to the treble audio content of the original input signal by generating harmonic series from the high frequency components contained in the input signal. The Quasi Stereo Module creates a stereo image of the enhanced input signal by adding and subtracting delayed and filtered versions of the enhanced input signal with itself to create left and right channeled stereo-like outputs. The technique provides a useful tool to regenerate from an audio signal more pleasant and joyful sounds.

A communications system, such as part of a real-time location system, includes a transmitter that can be part of a location processor, tag emission reader or tag interrogator that generates a frequency shift key (FSK) modulated wireless communication signal representative of digital data and transmits the communications signal over a wireless communications channel. A receiver such as incorporated within a tag transceiver used in the real-time location system receives the FSK modulated communication signal. The receiver includes a circuit for calculating the magnitude of low and high tones of the FSK modulated communication signal and a threshold for amplitude shift keyed (ASK) channel data and FSK channel data to derive the digital data even in the presence of on-tone jammers in the communications channel.

The disclosed auto gain volume control method for communication comprises: pre-defining voice flow state to decide in transmission for AGC and smooth transition from high pitch to silence. This invention overcomes defects of volume and voice discontinuity, and fit for video conference.

A solid stage audio power amplifier comprises of two output stages with one generating the real output signal that drives the real loud speaker load and the other mimicking the real output stage and generating a dummy output signal that drives a dummy resistor load. A frequency dependent feedback selection network, denoted as Feedback-Shifting network hereafter, is implemented between the two outputs and the input of the amplifier to fulfill a unique global feedback loop. In a particular embodiment, the Feedback-Shifting network can be constructed so that it receives more feedback information from the real output node than from the dummy output node at low frequencies, but less feedback information from the real output node than from the dummy output node at mid to high frequency bands. Such a power amplifier performs as a traditional solid state feedback amplifier at low frequencies by generating a clear and tight bass, but it sounds similar to an open loop tube amplifier at higher frequencies by reproducing natural mid-band and treble with less listening fatigue.

A speaker device includes first speaker units 2 and 5 and second speaker units 3 and 6 that are arranged symmetrically as viewed from a listening center axis X1-X2. The first speaker units 2 and 5 emit sounds in inward directions and reproduces at least the mid-range and above, and the second speaker units 3 and 6 emit sounds in a front direction and attenuates the treble range. With respect to a listening position in a front direction of one of the speaker systems 1 and 4, a sound arriving to the listening position from the first speaker unit of the speaker system located closer to the listening position, and a sound arriving thereto from the second speaker unit of the same speaker system, are destructive to each other in the mid-range due to a phase difference, whereby a sound pressure in the mid-range arriving from the speaker system located closer to the listening position is attenuated more, as compared with a sound pressure in the mid-range arriving from the speaker system located farther from the listening position. It is possible to achieve an excellent effect of expanding a listening position range for obtaining the center sound image localization, the natural sound quality without sense of discomfort, the large sound pressure reproduction, and the downsizing.

Point source speaker systems are provided. The point source speaker system receives audio input from a device. The system comprises a mountable enclosure, which contains a speaker array. The array includes a substantially forward facing left speaker, a substantially forward facing center speaker, a substantially forward facing right speaker and a horizontally mounted woofer speaker. A woofer tunnel is located behind the left, center and right speakers. The woofer tunnel accelerates woofer sound waves and terminuses at a woofer baffle which leads to a woofer port. The left speaker, center speaker and right speaker may include more than one speaker. One or more of these left speakers and right speakers may be a tweeter. The left speakers receive a left minus right input, the center speakers receive a right plus left input, and the right speakers receive right minus left input.

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.

A power efficient, acoustical Helmholtz resonator foghorn including a plurality of electrical emitters, some of which are redundant, arrayed at one end of a blocked tube with a plurality of exhaust ports located therein surrounded by a standoff tubular member. The foghorn tuned to provide a high pitch thus providing a compact horn having an acoustical path capable of producing an exceptional wavelength in a generally concentric horizontal sound propagation the horn configurable for use as either a one-half mile or two mile marine navigational aid for offshore structures, buoys, and the like.

A method for image reconstruction and reducing patient dose, and an imaging system for accomplishing these methods, includes selecting a primary phase of a cardiac cycle and calculating compromised phase regions based on a selected compromised phase value. If the image position is located within the primary phase, then an image is generated at the primary phase. If the image position is not located within the primary phase, but is located within a compromised phase region, then an image is generated at the compromised phase region.

A water-resistant and weatherproof high-fidelity/high power audio and speaker system adapted for outside use includes a top speaker member including a first speaker, a bottom speaker member including a second speaker, an audio component member and high current low voltage dc power supply for being mounted under the top speaker member, a spacer member for spacing the top speaker member with the bottom speaker member, and a guide member for cooperating with the spacer member to align the top speaker member and the bottom speaker member. The guide member may be a dowel pin, and the top speaker member may include a speaker terminal member to connect to the first speaker. The top speaker member may include a cabinet handle member to aid in lifting the top speaker member, and the top speaker member may include a tweeter speaker member. The top speaker member may include a woofer speaker member, and the top speaker member may include a base port member for passage of base level sounds.

A speaker assembly includes a speaker housing with a closed top wall, an opposed open end and first, second, third and fourth sidewalls extending downwardly from the closed top wall. The closed top wall is substantially planar and forms a support surface. First and second midrange drivers and first and second high frequency drivers are mounted within the housing, wherein the first midrange driver and the first tweeter are mirror images of second midrange driver and the second tweeter. A first support bracket supports the first midrange driver and first tweeter along a first side of the closed top wall adjacent the first sidewall of the speaker housing. The first support bracket includes a planar support surface which is obliquely oriented relative to a plane in which the closed top wall lies. A second support bracket supports the second midrange driver and the second tweeter along a second side of the closed top wall adjacent the third sidewall of the speaker housing. The first support bracket includes a planar support surface which is obliquely oriented relative to the plane in which the closed top wall lies.

The invention discloses a built-in sound system for thin video equipment, which uses two-fractional frequency labyrinth inverter speaker, and includes the loudspeaker, frequency divider, pilot pipe, box, althorn and sackbut. The structure of box is produced based on the internal space of video equipment and capacity requirement, and the labyrinth pilot pipe is installed on the wall of box cavity. In this invention, maze pilot pipe forms a longer bass channel in the box, to make the bass reflex in the channel for many times and double the strength, then after the collision reflection of the wall and desk, the air audio pressure is enhanced greatly, to achieve a HI-FI sound.

A three-dimensional, microscale-textured, grating-shaped organic solar cell geometry. The solar cells are fabricated on gratings to give them a three-dimensional texture that provides enhanced light absorption. Introduction of microscale texturing has a positive effect on the overall power conversion efficiency of the devices. This grating-based solar cell having a grating of pre-determined pitch and height has shown improved power-conversion efficiency over a conventional flat solar cell. The improvement in efficiency is accomplished by homogeneous coverage of the grating with uniform thickness of the active layer, which is attributed to a sufficiently high pitch and low height of the underlying gratings. Also the microscale texturing leads to suppressed reflection of incident light due to the efficient coupling of the incident light into modes that are guided in the active layer.

A super tweeter includes a magnetic base, a voice coil, a frame annularly mounted to the magnetic base, a central supporting member mounted on a central portion of the magnetic base, a diaphragm, an annular inner supporting member, and an annular outer supporting member. The diaphragm is connected between an annular outer side of the annular inner supporting member and an annular inner side of the annular outer supporting member. An annular inner side of the annular inner supporting member is engaged with the central supporting member. An annular outer side of the annular outer supporting member is engaged with the frame. The annular inner supporting member and the annular outer supporting member cause the diaphragm to vibrate in a balanced manner, generating super high frequency range of sound waves.

Typically, changes in timbre in an audio reproduction system use analogue or digital filters, either shelving filters (as in the case of bass, treble and loudness controllers) and/or peaking filters (as in the case of speed-and noise-compensation in automotive systems). A problem associated with this implementation lies in the audibility of the phase shift caused by these filters. According to the invention, this and further problems are solved by utilising the crossover network of the system itself—with level adjustable output signals—to attain desired timbre and/or dynamic range adjustments and hence avoiding undesirable phase effects of the traditional bass and treble control filters. An input signal (18) is according to an embodiment of the invention divided by a cross over network (20) into a number of frequency bands and applied via level control means (21, 22, 23) and separate power amplifiers (24, 25, 26) to loudspeaker drivers (27, 28, 29). In this manner, the mentioned phase shifts can be avoided and by proper control of the level adjustment means by a frequency-dependent analysis and weighting network (30), desired adjustment of timbre and dynamic range of the audio reproduction can be achieved. Also control dependent on vehicle speed and/or background noise can be incorporated into the system..

A surround sound system and method involving a surround sound tower (10) having planar speakers (11b); a base plate (20); and a structure for positioning (30) the surround sound tower on the base plate (20), the surround sound tower (10) being mounted on, and normal to, the positioning structure (30) for customizing sound direction and constructive interference patterns by interactively positioning the sound tower (10) and by modular usage of both sub-woofers (12a) and tweeters (13a), economizing floor space, especially in a home theater environment, the positioning structure (30) having a structure for indicating an angular rotation (40) of the surround sound tower (10) relative to the base plate (20) and a structure for facilitating rotation (50) of the angular rotation indicating structure (40).

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.

The invention discloses a production technology of a ribbon-type high-pitch diaphragm. The production technology comprises the steps that the size and the line of the composite high-pitch diaphragm are designed through CAD, a film negative plate is drawn, the height, the width and the length of the line are calculated according to technology resistance and the area of the composite high-pitch diaphragm, and the film negative plate is extended in a makeup mode; a polyimide diaphragm is used as a substrate, an aluminum foil is used as covering material, composite high-pitch diaphragm sheet material is formed in a high-temperature hot press mode, and four corners of the substrate adhere to a base plate; the surface of the covering material is cleaned in a spraying mode; photo-sensitive resist coats the surface of the covering material and is dried; the film negative plate covers a photo-sensitive resist diaphragm layer for exposure; developing, photographic fixing, cleaning and drying are conducted on the sheet material; damaged and incomplete places of an image are repaired, the sheet material is etched and cleaned, etching liquid is ferric trichloride, and the content of iron ions Fe3+ in the ferric trichloride is 46%; demoulding and cleaning are conducted on the sheet material; the sheet material is dipped with aluminum oxidation protective liquid; and the resistance value of the composite high-pitch diaphragm is checked finally. According to the ribbon-type high-pitch diaphragm prepared through the production technology, the line resistance value is formed at a time without repair, accuracy of the resistance value is high, and the using ratio of raw material is high.