232 results about "Sounding board" patented technology

A noise dosimeter with capability to rapidly predict noise exposure over an extended time period based on a measurement of short duration. Either an acoustic or an electrical earphone adapter provides a convenient means to connect the noise dosimeter to an external sound source. A direct input jack operable to receive at least one audio signal provides a signal to an RMS detector, which provides a DC signal to a two-stage amplifier circuit. The outputs of the amplifiers are provided to a processor having multiple A / D channels. The processor calculates accumulated noise doses and drives a display, which in one embodiment includes a panel of light-emitting diodes. In one embodiment, the dosimeter includes functionality for control of external devices such as sound boards.

An audibly reporting and contemporaneous pressure-relief, automatic tire assembly is disclosed for use in interaction with preexisting valve core stems on a tire of other vessel or with conventional tire rim inflation holes. The assembly of the invention has a channeled valve body having a moving inside pin, and communication from within its channel to a sound board emission port having check-reed position groove at its other end. A pressure-sensitive arc-like mechanism is provided, fabricated to provide an inwardly closing force equivalent to a preselected pressure limit desired for a respective tire or air / fluid-pressured container. This mechanism is mounted in relation to the valve body and supported by a hollow and ported collar so that it seats and exerts closing force against an exposed portion of the check-reed which sits and can move within its position groove. When air or fluid pressure is provided to the valve body, in installed position, the back pressure from this exerts a corresponding force on the check-reed. When this back-pressure force, representing pressure in the tire / container exceeds the force exerted by the pressure-sensitive mechanism leaning on the check-reed, the check-reed moves within its groove allowing excess pressure above the limit to escape, and contemporaneously reporting an audible whistling sound generated by the sound board conditions created by escaping air in adjoining spaces of the check-reed, check-reed groove, and ported support collar in relation to the valve body.

The invention relates to a ceiling type flat-panel sound box comprising a sound board, a sound sensor and a sound effect chamber; the sound sensor is arranged on the back surface of the sound plate; the sound sensor is connected with a driver in the sound effect chamber; the sound effect chamber is arranged on the back surface of the sound board; and the sound board is mounted on a ceiling. The surface of the sound board can be cut in the field according to the actual installing requirement. The sound box can be completely fused with the common ceiling; a sound box body is formed by artfully using a large top space formed after the ceiling is suspended, so that the low-frequency performance is greatly enhanced, and the sound box is convenient and easy to install and maintain and is very suitable for public spaces.

A double inlet game call apparatus includes at least two reed assemblies having two reeds, two sounding boards, and two air passageways. The reed assemblies may be physically separate and / or separate in terms of function, and are capable of simultaneously or alternatively producing sounds that simulate the sounds of wild animals. In particular, the multiple reed assemblies will allow the user of the game call to simulate a herd of animals. In one embodiment, the reed assembly section may be utilized without a sound chamber. In another embodiment, the reed assembly section is coupled to a single sound chamber. In yet another embodiment, the reed assembly section is coupled to a double sound chamber.

A device (10) for conditioning a stringed musical instrument (20), comprising a vibrator (30) mounted on a transverse supporting member (14) which attaches removably to one or more strings (26) of the instrument and makes no other contact with the instrument. The vibrations produced by the device are transmitted via the normal mechanical chain from the strings (26) to the bridge (24) to the sounding board (22) of the instrument.

An electronic keyboard musical instrument capable of performing delicate sound board vibration control based on outputs generated individually for respective ones of transducers, thereby realizing production of natural sounds with sufficient volume, and an easy tone quality adjustment. A sound board is fixed to a frame, and the transducers are mounted to the sound board so as to be spaced from one another. In accordance with first and second performance signals generated in response to a key operation of a keyboard and a damper pedal operation, driving signals for the transducers are individually generated in consideration of characteristics and mounting positions of the transducers, and the driving signals are supplied to the transducers. The sound board is thereby caused to vibrate at a frequency varying according to a tone pitch, thus producing a musical tone and / or a damper tone.

The invention discloses a device and a realization method capable of efficiently recycling aquiculture. The device comprises a plant growing floating bed, a microbial cultivation middle layer and a bottom layer sounding board, wherein the plant growing floating bed is arranged on a water surface and can absorb excrement of fishes, nitrogen and phosphorus in water; the microbial cultivation middle layer is arranged in water below the plant growing floating bed and can purify sewage; and the bottom layer sounding board is arranged below the microbial cultivation middle layer, is matched with the microbial cultivation middle layer and effectively degrades various contaminants in the sewage. The device and the realization method capable of efficiently recycling the aquiculture have good water purifying effect and low cost in the aquiculture, well take advantages of a large amount of harmful substances, ammonia and hydrogen sulfide generated in the water, improve the digestibility of aquatic products, reduce diseases and death rate, and improve the growth rate and meat quality of the aquatic products.

A personal noise dosimeter having functionality for increasing the dynamic range of the device. A microphone provides a signal to an RMS detector, which provides a DC signal to a two-stage amplifier circuit. The outputs of the amplifiers are provided to a processor having multiple A / D channels. The processor calculates accumulated noise doses and drives a display, which in one embodiment includes a panel of light-emitting diodes. A current source injects current into the output of the RMS detector to reduce performance degradation. Functionality detects and accounts for voltage offsets in the dosimeter. The microphone is turned off during offset determination. In one embodiment, the dosimeter includes functionality for control of external devices such as sound boards.

There is provided a pickup apparatus for reliably and correctly picking up piano sound by rigidly connecting a sound source member such as a sound board of a piano body, with a stationary member such as a cast-iron plate with use of a pickup apparatus body of the invention to one another so as to pickup the generated vibration force. The pickup apparatus can also be attached to or detached from an existing piano easily and at low cost, and the piano is not damaged when the pickup apparatus is attached to and detached from the piano. Further, noise component which is unnecessary for the piano sound can be eliminated by providing the pickup apparatus body of the present invention with a mechanical vibration filter.

A suspended bracing system is disclosed that allows the sound board of an acoustic instrument, such as a guitar, to vibrate more. As a result, the instrument projects more tone and volume than that provided by conventional guitar sound boards. Conventional sound boards have wood or synthetic bracing glued all across the sound board. This is to prevent the bridge from pulling up when the strings are tightened to pitch. Using the suspended system, the invention disclosed herein secures the bridge, but drops the bracing below the sound board of the guitar to allow the sound board more freedom to vibrate.

A vibration excitation device, the vibration excitation part (32A) which is elongated along the X direction is arranged on the vibration substrate (31) which is elongated along the X direction, and the two ends of the vibration excitation part (32A) are fixed on on the vibration substrate (31). In addition, a piezoelectric element (33) functioning as a vibration generating mechanism is provided on an X-direction middle portion of the vibration excitation member (32A). The vibrating substrate (31) is directly or indirectly fixed on the sounding vibrating body, and the vibration of the vibrating component (32A) is transmitted to the sounding vibrating body through the vibrating substrate (31), so that the sounding vibrating body is in a sounding state. The vibrating device can emit sound from the sound-emitting vibrating body of the machine body.

In accordance with the invention, a sound box for an instrument is provided exhibiting a 3-D bracing system. The bracing system comprises a plurality of braces on both the sound board and the bottom board of the sound box. The braces exhibit varying heights and configurations to, among other things, increase the strength without increasing the weight unnecessarily.

A stringed musical instrument has a body coupled to a single neck, multiple registers of strings, and a bridge that provides for at least one of acoustic and electronic separation of the multiple registers. The strings are preferrably arranged in paired courses, each of which has two members tuned to vibrate sympathetically with one another. In at least one of the members of each pair is a metallic string, and the other is a nylon or other non-metallic string. Preferred examples include a guitar, and more preferably an acoustic 12-string guitar. The bridge preferably has interleaved saddles for the various strings, each of which has its own associated pickup. The sounding board is reinforced with transverse brace struts. Optional equipment includes a balancing circuit that can be used to balance outputs of the vibration sensors.

The invention discloses a testing method of characteristics of sound vibration and point vibration of a piano sound board and special equipment thereof. The testing method of sound vibration and point vibration comprises the steps of applying the modern technologies, such as magnetostriction, audio measurement, vibration measurement, computer frequency spectrum analysis and the like in the manufacturing process of the piano sound board, utilizing a sound sensor and a vibration sensor for respectively detecting an integral sound vibration signal of the sound board and a point vibration signal of a local area, then analyzing the comprehensive vibration characteristics of the sound board through a computer frequency spectrum system, and further realizing the oriented tuning of the sound board. The method has the advantages of high sensitivity, fast and accurate measurement and strong intuition, and can effectively control the sound of the sound board and provide the scientific method andmeans for objective identification, evaluation and tuning of the acoustic quality of the piano sound board.The special equipment for testing of the characteristics of the sound vibration and the point vibration of the piano sound board mainly comprises an audio sweep signal generator, a magnetostrictive audio transducer, a measurement microphone, an accelerometer, a data acquisition card, professional frequency spectrum analysis software, a computer and the like.

Sounds in different frequency range are generated from the rear, top and / or front face of the musical tone apparatus, sounds are generated and spread in all directions around the musical tone apparatus, and the tones sound very realistically acoustic.Vibration of the sound board does not resonate, tones generated from the sound board are not changed unintentionally, and tones of real acoustic musical instruments are realized.Vibration from the sound board is not directly transferred to the whole musical tone apparatus, by means of not allowing the sound board to touch the body of the musical tone apparatus and of pressing and fixing the soundboard to the attachment component with the thickness of the attachment component compressed.

The invention converts non audio systems into distributed audio sources for active noise control solutions. The system transforms non acoustic structures into soundboards using inertial type acoustic transducers. Acoustic parameters unique for each application due to the variation in properties of the sound board are compensated by equalizers. The invention also uses damping means to limit the reflection of bending waves from the edges. The inertial type acoustic transducer is driven by an amplifier. The acoustic signal to the amplifier is modified by a signal conditioner to compensate for the non optimal response of the acoustic system. An external controller communicates with the amplifier to control its operating parameters. A series of distributed audio sources in a variety of positions may each be addressable as a node on a network wherein noise detected at that source is analyzed and the system generates sound at that source to mask the noise.

An improved bridge for a guitar or other stringed instrument which offers individual height and length adjustment for each string. The bridge uses adjusters in which one part, the saddle, pivots or rocks, on a fulcrum relative to a supporting part, the anvil. The fulcrum may be incorporated into either part or may be a separate element. The fulcrum is generally perpendicular to the string and extends the full width of the adjuster. This configuration, combined with a close fit at the fulcrum results in a tight fit with minimal linear movement and no axial movement (about the vertical axis) between the parts of the adjuster. The combination of this with the ability to use relatively large elements results in an adjuster, and a bridge, with minimal dampening effect, or energy loss, on the string and improved transfer of sound energy to the sound board of the instrument.

A noise dosimeter with capability to rapidly predict noise exposure over an extended time period based on a measurement of short duration. Either an acoustic or an electrical earphone adapter provides a convenient means to connect the noise dosimeter to an external sound source. A direct input jack operable to receive at least one audio signal provides a signal to an RMS detector, which provides a DC signal to a two-stage amplifier circuit. The outputs of the amplifiers are provided to a processor having multiple A / D channels. The processor calculates accumulated noise doses and drives a display, which in one embodiment includes a panel of light-emitting diodes. In one embodiment, the dosimeter includes functionality for control of external devices such as sound boards.

A suspended bracing system is disclosed that allows the sound board of an acoustic instrument, such as a guitar, to vibrate more. As a result, the instrument projects more tone and volume than that provided by conventional guitar sound boards. Conventional sound boards have wood or synthetic bracing glued all across the sound board. This is to prevent the bridge from pulling up when the strings are tightened to pitch. Using the suspended system, the invention disclosed herein secures the bridge, but drops the bracing below the sound board of the guitar to allow the sound board more freedom to vibrate.

An electronic keyboard musical instrument which can realize natural sounds with favorable sound quality as an acoustic piano. A sound board 33 made of a plate member is vibrated so as to generate musical tones. A first performance signal generator 22 generates a first performance signal based on the operating state of a plurality of keys of a keyboard 17. A second performance signal generator 23 generates a second performance signal, which is different from the first performance signal, based on the operation of the plurality of keys and the operation of a pedal 18. Speakers 41A to 41D generates musical tones based on the first performance signal generated by the first performance signal generator 22. Transducers 21A to 21C mounted to the sound board 33 vibrate the sound board 33 based on the second performance signal generated by the second performance signal generator 23.

Sounds in different frequency range are generated from the rear, top and / or front face of the musical tone apparatus, sounds are generated and spread in all directions around the musical tone apparatus, and the tones sound very realistically acoustic. Vibration of the sound board does not resonate, tones generated from the sound board are not changed unintentionally, and tones of real acoustic musical instruments are realized. Vibration from the sound board is not directly transferred to the whole musical tone apparatus, by means of not allowing the sound board to touch the body of the musical tone apparatus and of pressing and fixing the soundboard to the attachment component with the thickness of the attachment component compressed.

The present invention intends to provide a piezo-electric speaker which can generate a sound from the low frequency range to the high frequency range as well as transmit the acoustic vibration to a sound-board with a high efficiency. This is achieved by providing a piezo-electric speaker comprising a piezo-electric member generating a strain according to an electric signal applied thereto; a piezo-electric vibration plate converting the strain to the acoustic vibration; and a sound-board resonating to the acoustic vibration; the piezo-electric plate being supported on the sound-board; the acoustic vibration caused by the piezo-electric vibration plate being propagated from the sound-board to the ambient air to generate a sound.

An acoustic musical instrument includes a sounding board which has a top and a bottom surface. The top includes a bridge and the bottom includes a plurality of tone bars. A string block extends between two of the tone bars and is spaced from said sounding board. The string block includes means for anchoring at least one string end. The instrument is strung by anchoring a first end of each string to the string block and attaching a second end of each string to a tensioning device.

A grand piano generates acoustic tones through vibrations of strings and sound board so that the acoustic tones are converted to analog audio signals at recording points over the sound board, and a group of waveform data sets are produced from the analog audio signal through sampling and analog-to-digital conversion; when electronic tones are generated, delay parameters and volume parameters are determined on the basis of differences between the recording points and tone radiating points occupied by loud speakers, the sets of waveform data series are sequentially read out from the group of waveform data sets and are modified with the delay parameters and volume parameters so that the electronic tones become close to the acoustic tones.

A sound system producing characteristic sounds from an acoustic instrument is provided. The sound system may include a stringed musical instrument and an electronic audio subsystem. The stringed musical instrument may include a neck extending away from a body toward a head. A plurality of strings may be stretched from a bridge on the body to the head at a terminal end of the neck. The bridge may be coupled to a soundboard and operable for connecting the plurality of strings to the body. The electronic audio subsystem may include at least one distributed mode loudspeaker. The distributed mode loudspeaker may be attached to the soundboard of the stringed musical instrument. The distributed mode loudspeaker may induce uniformly distributed vibration modes in the soundboard. A power amplification device may be disposed inside the body of the stringed musical instrument to provide power to the distributed mode loudspeaker.

An electronic keyboard musical instrument capable of performing fine soundboard vibration control based on outputs generated individually for each transducer, thereby realizing natural sound reproduction with sufficient volume and easy tone quality adjustment. The soundboard is fixed on the frame, and the transducers are spaced apart from each other and installed on the soundboard. Based on the first and second performance signals generated in response to key operations of the keyboard and damper pedal operations, drive signals for the transducers are respectively generated in consideration of the characteristics and installation positions of the transducers, and the drive signals are supplied to the transducers . The soundboard is thereby caused to vibrate at a frequency that varies according to the pitch, thereby producing musical tones and / or damper tones.

An electronic keyboard musical instrument which can realize natural sounds with favorable sound quality as an acoustic piano. A sound board (33) made of a plate member is vibrated so as to generate musical tones. A first performance signal generator (22) generates a first performance signal based on the operating state of a plurality of keys of a keyboard (17). A second performance signal generator (23) generates a second performance signal, which is different from the first performance signal, based on the operation of the plurality of keys and the operation of a pedal (18). Speakers (41A-41D) generate musical tones based on the first performance signal generated by the first performance signal generator (22). Transducers (21A-21C) mounted to the sound board (33) vibrate the sound board (33) based on the second performance signal generated by the second performance signal generator (23).

A personal noise dosimeter having functionality for increasing the dynamic range of the device. A microphone provides a signal to an RMS detector, which provides a DC signal to a two-stage amplifier circuit. The outputs of the amplifiers are provided to a processor having multiple A / D channels. The processor calculates accumulated noise doses and drives a display, which in one embodiment includes a panel of light-emitting diodes. A current source injects current into the output of the RMS detector to reduce performance degradation. Functionality detects and accounts for voltage offsets in the dosimeter. The microphone is turned off during offset determination. In one embodiment, the dosimeter includes functionality for control of external devices such as sound boards.