214 results about "Vibrating string" patented technology

Disclosed is a stringed instrument that includes a plurality of strings and a pickup to which each of the plurality of strings is respectively coupled that is connectable to a computer to implement DSP modeling. A serial interface circuit is coupled to the pickup and to a digital connector that formats each digital string vibration signal received from the pickup into a digital serial protocol. A computer is coupled by a serial link to the digital connector such that the computer receives each serially formatted digital string signal (SFDSS). The computer operates at least one audio DSP-based software module to process each received SFDSS wherein each SFDSS is processed in order to emulate a corresponding string tone of one of a plurality of stringed instruments to create an emulated digital string tone signal (EDSTS). Each EDSTS is then transmitted back over the serial link to the stringed instrument for playback.

A method for tomographic modeling of seismic wave travel times from well drilling records generated by drill string vibrations during drilling and identifying in the recorded vibration at least one of direct, reflected, refracted, converted and diving waves so as to measure wave velocity in near surface layers.

An electric stringed instrument, e.g. an electric guitar, featuring a body having a rectangular shaped, through-the-body cutout between the neck and bridge, and having a connector in a portion of the cutout. Pins on the connector are wired to electronic control components that are permanently fixed in the body. A rapidly interchangeable pickup assembly containing one or more pickups, in any combination of single and dual coils, fits into the cutout. Many and varied pickup assemblies, each with different characteristics of tone, strength, and frequency range emphasis can be interchangeably installed into the cutout. A connector on the pickup assembly mates with the body connector, thus accomplishing an electrical connection between the pickups in the assembly and the control electronics. The pickup assembly, having no control electronics on it, is light, compact, and easily maneuvered with one hand into and out of the cutout from the rear of the instrument. Once securely installed, the pickup assembly is in the optimum position to respond to string vibration. This vibration is converted into an electrical signal, sent and processed through the control electronics to an external unit for amplification.

A bowstring vibration and noise suppressor, the vibration and noise suppressor being carried by a support having an attachment device at an end of the support for attachment to a limb of an archery bow. The support carries the vibration and noise suppressor which is configured and arranged to suppress vibration and noise created by the bowstring when launching an arrow.

Disclosed is a stringed instrument with embedded DSP modeling capabilities to model an acoustic stringed instrument. The stringed instrument has a body and a plurality of strings and each of the plurality of strings is respectively coupled to a pickup to detect a vibration signal for each string. An A / D converter converts the detected vibration signal of a string into a digital string vibration signal. A DSP is located within the body of the stringed instrument to process the digital string vibration signal and to implement an acoustic modeling system to process the digital string vibration signal in order to emulate a corresponding string tone of one of a plurality of selectable acoustic stringed instruments. Acoustic modeling includes acoustic string and body modeling, microphone placement modeling, and pick-sound modeling. The emulated acoustic digital tone signal is then converted to analog form for output to an amplification device.

A digital guitar processing circuit includes a guitar converter circuit and a guitar formatting circuit. The guitar converter circuit receives one or more analog string signals representative of the string vibrations of a guitar and generates one or more digital string signals based upon the analog string signals. The guitar formatting circuit formats the digital string signals to be compatible with a digital communication protocol, and outputs the formatted digital string signals.

The invention discloses a concrete axis stretching creep tester and a test method thereof. The tester comprises an upper pulling plate, a lower pulling plate, pulling bars, screws, a spring, a stress sensor and vibrating string extensometers, the pulling bars are fixed on the lower pulling plate, and the upper ends of the pulling bars are provided with thread ends; the upper pulling plate traverses the upper ends of the pulling bars and is sleeved on the thread ends, and the thread ends at the upper and lower sides of the upper pulling plate are provided with nuts to fix the upper pulling plate; the upper and lower pulling plates are provided with the screws respectively and are used for the fixed connection of the upper and lower end of a concrete test piece, and the vibrating string extensometers are arranged at two sides of the concrete test piece; and the screw on the upper pulling plate stretches out of the upper pulling plate, the spring is sleeved on the stretching end of the screw, the stretching screw is also sequentially sleeved with a pad and a nut, and the stress sensor is arranged between the pad and the nut. The tester and the method realize the continuous automatic detection and acquisition of deformation; and no eccentricity, concentrated stress and constant stress are realized in the stretching process, so the test accuracy is improved.

Disclosed is a stringed instrument that includes a plurality of strings and a pickup to which each of the plurality of strings is respectively coupled that is connectable to a computer to implement DSP modeling. A serial interface circuit is coupled to the pickup and to a digital connector that formats each digital string vibration signal received from the pickup into a digital serial protocol. A computer is coupled by a serial link to the digital connector such that the computer receives each serially formatted digital string signal (SFDSS). The computer operates at least one audio DSP-based software module to process each received SFDSS wherein each SFDSS is processed in order to emulate a corresponding string tone of one of a plurality of stringed instruments to create an emulated digital string tone signal (EDSTS). Each EDSTS is then transmitted back over the serial link to the stringed instrument for playback.

A system for producing music from a stringed musical instrument includes a sensor / actuating transducer arrangement coupled to each or all of one or a plurality of the tensioned strings and supervisory system that governs one or more motion controllers associated with the transducer to affect the string vibration through at least one actuator transducer coupled to the string(s) in accordance with technique commands issued by the player of the instrument, the technique commands being recognized by processes in the supervisor from among characteristics of signal features extracted by further processes continuously analyzing the motional behavior of one or more strings.

A vibration dampening device for use on compound archery bows. A device may be associated with one or more bow limb, with each device disposing a vibration damping bumper in position to shorten the vibrating length of the bow string at brace, compared to the vibrating length of a bow string of a comparable bow lacking the device(s). Certain embodiments couple bowstring vibration at brace with one or more cable. Preferred embodiments include a limb anchor adapted to distribute string-induced loading onto a bow limb at both sides of a string cam.

The invention discloses a calibrating device for a vibrating string type strain transducer. Mounting blocks at two ends of the vibrating string type strain transducer are sleeved on a fixed lantern ring, the lantern ring is arranged on a bracket through a locking piece, a spinodal handle is connected with a dial gauge through a threaded differential fine tuning mechanism, the dial gauge is arranged on a gauge stand, and two ends of the gauge stand are connected with the threaded differential fine tuning mechanism and the vibrating string type strain transducer respectively; the number of measuring bars is two, the two measuring bars are fixed at the upper and lower ends of a bracket respectively, two ends of an extensometer are connected with the two measuring bars respectively, the extensometer is connected with a measuring indicator, and the extensometer is positioned on one side of the vibrating string type strain transducer; and a frequency meter is connected with the vibrating string type strain transducer. Based on the differential thread transmission principle, the calibrating device realizes the function of rotary fine tuning movement, has high measurement accuracy, realizes wide-range measurement, is simple to operate, calibrates the vibrating string type strain transducer through simulation, and is applicable to the metering calibration for various graded places.

Photodiodes in combination with an amplifier of transimpedance configuration provides an optical vibration detector having a linear frequency response with a light emitter and sensor of sufficiently small size to be inserted between strings of a musical instrument in order to provide signals suitable for amplification. The frequencies of vibrating strings of a musical instrument can be converted in accordance with either of two converter embodiments to control a music synthesizer, an automatic music transcription arrangement or the like.

An apparatus for applying a force to a stuck object in a wellbore comprises a work string extending in the wellbore. A vibrating string has a vibrator engaged with the stuck object. The vibrator drives the vibrating string to impart the force to the stuck object. An isolator associated with the work string and the vibrating string decouples a portion of a motion of the vibrating string from the work string. A method of applying a force to a stuck object in a wellbore comprises extending a work string in the wellbore from a surface location. A vibrating string is engaged with the stuck object. The vibrating string is driven at a frequency to apply the force to the stuck object. The work string is isolated from the vibrating string such that a portion of the motion of the vibrating string is decoupled from the work string.

The present invention teaches an electro-acoustic guitar having an isolated resonant soundboard with or without an integrated transducer attached to the soundboard. The soundboard / transducer assembly fits into an aperture of the guitar body frame and has structure allowing it to be adjusted in multiple axes to provide the best playing action. The soundboard may also be interchangeable with other soundboards to further alter sound quality. String vibration energy is conducted by an acoustically pure bridge to the soundboard / transducer assembly. The large magnetic transducer is integrated by having one portion, a magnet structure, secured to a magnet support and another portion, the voice coil and mounting hub, secured to the soundboard spaced and opposed above the magnet support thus creating a truly integrated electro-mechanical soundboard transducer assembly with tonal qualities modified by an internal chamber defined by the space between the soundboard and the magnet structure support.

An electric-acoustic stringed instrument has a removable, adjustable and acoustic artwork top with a decorative bridge and tailpiece; a mounting system for electric string vibration pickups that allows five degrees of freedom in placement and orientation of each pickup anyplace between the neck and bridge; a pickup switching system that provides K*(K−1) / 2 series-connected and K*(K−1) / 2 parallel-connected humbucking circuits for K matched single-coil pickups; and an on-board preamplifier and distortion circuit, running for over 100 hours on two AA cells, that provides control over second- and third-harmonic distortion. The switched pickups, and up to M=12 switched tone capacitors provide up to M*K*(K−1) tonal options, plus a linear combination of linear, near second-harmonic and near-third harmonic signals, preamp settings, and possible additional vibration sensors in or on the acoustic top.

A stringed musical instrument, such as a guitar, whereby the lower end of the strings are anchored to the soundboard itself with one or more of the string anchors being positioned past the bridge. This arrangement provides an offset of the lateral compressive forces to the entire soundboard, therefore allowing the soundboard to vibrate more freely in response to the string vibration, and creating an acoustical perpetuating effect. Due to the inherent strength to this design, internal soundboard bracing can be minimized in weight and size as well, which offers a fuller and louder sound, with an increase in sonic balance and sustain.

An apparatus and method for amplifying low amplitude vibrations from stringed instruments, and in particular guitars while reducing Gaussian and 60 Hz hum noise from the signal. In particular, the invention incorporates the use of one or more bipolar magnets in conjunction with high precision differential amplifiers and a power source. The bipolar magnets may be arranged at varying locations on the guitar as long as they are within range to induce an electrical signal in the strings when they are played. The signal is then fed through the amplifier circuitry whereby noise is eliminated and then played through a standard speaker.

An optoelectronic pickup for a musical instrument includes at least one light source which directs light to impinge a string of the musical instrument in at least one photoreceiver located to detect the reflected light, so as to generate an electrical signal that is responsive to string vibrations. A number of different filter approaches are disclosed that can control undesired effects of spurious light. The filter approaches may be structure-based, signal processing-based, and / or optics-based.

String vibration is reduced without causing friction loss. A silent chain is comprised of a multiple number of link plates, each of which has a pair of tooth portions and pin holes and which are laminated laterally and longitudinally and guide plates which are arranged at outermost positions of the link plates. The link plates and the guide plates are connected by connecting pins. In this construction, some of the guide plates are made heavier than that of other guide plates and are irregularly mixed in a longitudinal direction of the chain. Thus, the natural frequency can be changed in an arbitrary chain span and string vibration may be reduced without causing friction loss.

A portable electronic stringed instrument is disclosed. The folding instrument includes a neck portion and a body portion and a connection portion for connecting the neck portion to the body portion. A plurality of adjustable neck strings are disposed between a nut and a neck bridge on the neck portion and a plurality of adjustable body strings are disposed between a nut and a body bridge on the body portion. A finger placement sensor array is disposed on the neck portion proximate the frets and the neck strings. A string vibration sensor is disposed on the body portion proximate the body strings. Although the approximate length of the neck portion can be about 8 to about 12 inches, the fret board on the neck portion includes a plurality of frets that are precisely spaced to provide the fret spacing of a standard, 25.6- to 26-inch “scale length” acoustical guitar.

An archery bow string vibration suppressor includes a telescoping arm having a hollow member and an internal slideable elongate shaft. A bumper is affixed to the distal end of the elongate shaft. Furthermore, the vibration suppressor includes a male threaded coupling for affixing the telescoping arm to the rear mounting hole of a bow. In additional embodiments, the vibration suppressor includes an offset adapter bracket for affixing the vibration suppressor to the rear mounting hole of a bow or extension adapter bracket for affixing the vibration suppressor to the front mounting hole of a bow.

Provided is an electronic stringed instrument comprising: a pickup that detects vibration of a string; a feedback operator used to select a level of feedback effect; a feedback control device that controls to add a feedback effect to a tone signal based on the vibration of the string detected by the string vibration detection device and based on the selected level of feedback effect from the feedback operator; and an output device that outputs the tone signal to which the feedback effect is added by the feedback control device.

The present invention provides a bridge for a stringed instrument with improved structure design which allows the bridge to be made of light-weight acoustically resonant material. The bridge comprises a plurality of adjustable saddles that are always in contact with the adjacent saddles, the internal bottom wall, and / or the end walls of the first chamber of the bridge. The constant contacts enable these plurality of parts to be unified by pressure allowing for excellent transmission of the string vibrations. The compressive load provided by these constant contacts enables the instant bridge to withstand even the heaviest load of strings. In addition, the bridge comprises thin walls facilitating resonance. The bridge may also comprise internal piezoelectric elements. The bridge is able to produce authentic acoustic sounds for an electric guitar without the need for pre-amplification or signal conditioning.

The invention relates to the field of high-voltage transmission and transformation, in particular to a testing system for an insulator string vibration test. The testing system comprises insulator strings, an insulation string suspension device, two anchoring devices, an electromagnetic vibration platform, a split conductor, a force transducer and a measurement and control device, wherein the two anchoring devices are arranged on the horizontal surface through a support and connected through the split conductor, the electromagnetic vibration platform is also arranged between the two anchoring devices, and the electromagnetic vibration platform is connected with the split conductor; the suspension insulator string is connected to the split conductor between the electromagnetic vibration platform and one anchoring device, and the strain insulator string is arranged between the electromagnetic vibration platform and the other anchoring device; and the electromagnetic vibration platform and the force transducer are also connected with the measurement and control device simultaneously. The testing system disclosed by the invention can be used for finishing a vibration creep test of the suspension insulator string and the strain insulation string in the field of high-voltage transmission and transformation.

The invention discloses a circular polarization string standing wave demonstration instrument. A rectangular bottom plate (1) is arranged, the two ends, extending in the length direction, of the bottom plate are respectively and fixedly provided with a supporting rod (2), and the two ends of an elastic fluctuation rope (4) in the straightening state are fixed on the supporting rods respectively. One end of the bottom plate is provided with a motor box (5) with adjustable speeds, a metal circular disk (6) is fixedly arranged at the end of a motor shaft, an eccentric shaft (7) which protrudes outwards is fixed on the outward disk surface of the circular disk, a guide groove (8) is dug in the end of the circular disk, and the straightened elastic fluctuation rope is in contact with the guide groove. The above circular polarization method is used for enabling string vibration to generate transverse waves, and the standing wave instrument is simple in structure, easy and convenient to operate and obvious in demonstration effect.

In a coefficient measurement apparatus, a line input terminal receives a pickup signal that is generated based on a string vibration of a musical instrument. A microphone input terminal receives a microphone signal acquired by a microphone that collects sounds of the musical instrument. An adaptive filter estimates a transfer function associated to resonance of the musical instrument and a transfer function of an acoustic space formed from the musical instrument to the microphone, generates an output signal by processing the pickup signal using the estimated transfer function, and updates the transfer function using a difference between the output signal and the microphone signal as a reference signal.