The invention relates to an acoustic product composed of composite material, such as a musical musical instrument, a part thereof, an acoustic equipment or like, which is manufactured from raw material comprising at least cellulose based substance and plastic based substance by means of a thermoplastic process, such as by pressing, compression molding, injection molding, extrusion, blow molding by heat, rotational molding and/or the like. The acoustic product has a material composition consisting of fiber substance (1) based on surface modified cellulose and plastic based substance (2), wherein the product has an essentially wood-like, but isotropic sound.

A stringed musical instrument and method of constructing a stringed musical instrument, having a body with a hollow or semi-hollow interior, a front and rear sound board disposed on opposite sides of the hollow interior, a single set of strings and a dual bridge and saddle assembly extending between the front and rear sound board with the dual bridge and saddle assembly including a first bridge and saddle mounted upon the front sound board, a second bridge and saddle mounted upon the rear sound board and with said single set of strings being strung such that the single set of strings interconnect the first bridge and front sound board to the second bridge and rear sound board through the interior body of the musical instrument for generating sound from each sound board respectively.

A saddle for a stringed musical instrument, which includes a bridge plate attached to a sound board corresponding to an anatomical surface of the musical instrument with the bridge having a slot with a geometry adapted to receive the saddle, comprising a body having at least one member with a first and second section in which the first section, in cross section has opposite ends, and a geometry conforming to the geometry of the slot in the bridge and a width approximately equal in dimension to the width of the slot in the bridge so that the opposite ends of the first section tightly fit into the slot of the bridge when the first section is inserted therein and with the second section having a width substantially wider than the width of the first section and having two lateral sides, in cross section, extending from the opposite ends of the first section to form, in combination with the first section, a T fitting such that the saddle possesses a substantially higher resistance to bending forces from tension in the strings in the musical instrument as compared conventional saddle structures.

A stringed instrument having a flex action tremolo. The assembly includes a neck of the stringed instrument that is capable of pivoting to cause the stings of the instrument to slack or tighten depending on the movement of the neck. A metal bar extends across a portion of the hollow portion of the body and is connected to the neck. There is at least one spring-loaded connection between the metal bar and the inside surface of the hollow portion of the body. This allows the metal bar and neck to pivot at one or more angles relative to the longitudinal axis of the neck, while maintaining the tuning of the guitar when the neck is returned to a neutral position.

An adjustable instrument neck stiffener includes end plugs at each end of a hollow composite tube, which is preferably D-shaped, along with an adjusting bolt at one end. A first tension strip connects to one of the end plugs and a sliding element. A second strip, which is preferably made of carbon fiber, is located near the flat surface of the hollow composite tube, stiffening that side of the hollow composite tube. Tightening the adjusting bolt moves the sliding element towards the adjusting bolt end. The tension strip is also tightened, thus bowing the hollow composite tube and the instrument neck downward. This puts the hollow composite tube into compression and counteracts the tension created by the strings of the musical instrument.

Embodiments of the present disclosure relate generally to guitars or other string instruments (10) that incorporate materials that are lighter than wood. Rather than achieving weight reduction by solely removing wood, which can weaken the structural integrity of the guitar and negatively alter sound quality, this disclosure provides replacement of removed wood with materials (16) commonly used in aerospace.

A string tensioner module for a stringed musical instrument is configured to apply a constant or near-constant tension to the musical strings of the instrument. The module is divided into a plurality of string tensioners, one string tensioner for each musical string. Each string tensioner employs a primary spring that apply the primary force coaxial with the string. Each string tensioner also employs a secondary spring that applies a secondary force in a direction crossing the axis of the string, and thus applying an axial force component that changes as the angle of the secondary spring changes. The primary and secondary springs are selected so that the change in the axial force component of the secondary spring as the string changes in length approximates the change in force applied by the primary spring so that the axial force applied to the string remains generally constant even as the string changes in length.

The fingerboard/fretboard and/or bridge of a stringed instrument such as a guitar or violin is constructed lead crystal in lieu of the tradition wood construction utilized for these components. The lead crystal components are identically shaped to the components they are replacing. Changing the materials of construction of the fingerboard/fretboard and/or bridge to lead crystal in the stringed instrument creates a sound which is cleaner and with less distortion than those stringed instrument with a wooden fingerboard/fretboard and/or bridge. Additionally, utilizing a lead crystal the fingerboard/fretboard and/or bridge also provides a unanticipated benefit, the instrument is no longer capable of creating a screeching sound when played improperly. The resulting instrument is one which is simpler to play for both novices and advanced players, which is still capable of emanating an appealing sound.

The fingerboard/fretboard and/or bridge of a stringed instrument such as a guitar or violin is constructed lead crystal in lieu of the tradition wood construction utilized for these components. The lead crystal components are identically shaped to the components they are replacing. Changing the materials of construction of the fingerboard/fretboard and/or bridge to lead crystal in the stringed instrument creates a sound which is cleaner and with less distortion than those stringed instrument with a wooden fingerboard/fretboard and/or bridge. Additionally, utilizing a lead crystal the fingerboard/fretboard and/or bridge also provides a unanticipated benefit, the instrument is no longer capable of creating a screeching sound when played improperly. The resulting instrument is one which is simpler to play for both novices and advanced players, which is still capable of emanating an appealing sound.

A stringed musical instrument and method of constructing a stringed musical instrument, having a body with a hollow or semi-hollow interior, a front and rear sound board disposed on opposite sides of the hollow interior, a single set of strings and a dual bridge and saddle assembly extending between the front and rear sound board with the dual bridge and saddle assembly including a first bridge and saddle mounted upon the front sound board, a second bridge and saddle mounted upon the rear sound board and with said single set of strings being strung such that the single set of strings interconnect the first bridge and front sound board to the second bridge and rear sound board through the interior body of the musical instrument for generating sound from each sound board respectively.