WO2017049966A1 - Sound amplified guitar - Google Patents

Abstract

A sound amplified guitar comprises: a resonance box (10) formed of an upper board (6), a lower board (7) and a side board; a sound hole (5) disposed on the upper board (6); a guitar string (1) located above the sound hole; a bridge configured to fix one end of the guitar string (1); a pickup device (2) configured to convert a mechanical vibration produced by the guitar string (1) into an electrical signal; a sound amplification module (8) configured to amplify the electrical signal; a vibration enhancement device configured to convert the amplified electrical signal into a mechanical vibration and transmit the same to the upper board (6) and the lower board (7) of the resonance box (10); and a power supply module configured to supply power. The embodiment can resolve a sound volume problem of an acoustic guitar, enhancing music performance of a guitar.

Description

A PA acoustic guitar  Technical field

 The present invention relates to musical instruments, and more particularly to a guitar that can be amplified.

Background technique

 Acoustic Guitar It has a long history and can be traced back to the Renaissance in Europe. After hundreds of years of development and evolution, it still lasts forever. The guitar can be popped with singing melody and rich harmonies. The sound can also be changed colorfully, and its portable features make it the most popular instrument in the world today.

However, the biggest disadvantage of an acoustic guitar is that its volume is too small. This disadvantage makes it difficult for acoustic guitars to coordinate with other instruments, which greatly hinders the guitar becoming an important classical instrument. In the electrical age, there is an electric guitar that can replace the acoustic guitar, and the acoustic guitar itself can also be equipped with a pickup, which becomes an electric box piano, and the volume is increased by an external speaker.

 However, although the above method solves the problem of the volume of the acoustic guitar, it also brings the following new problems:

 1 The size of the acoustic guitar itself is not small, and it also needs to be equipped with a bulky external speaker or sound system, which makes the wooden guitar's portability advantage greatly reduced. In addition, the performance cost is also significantly increased.

 2 For serious musicians who are pursuing the acoustic sound of acoustic guitars, it is difficult to accept that the music played on the spot is broadcasted from the speakers. The more popular music to be played on the spot should come from the vibration of the panel of the instrument itself. Therefore, the existing External system speakers are difficult to meet the needs of users seeking acoustic guitar acoustic sound.

 Therefore, it is an urgent technical problem to be solved in the industry to provide a sound-amplified acoustic guitar that is easy to carry, has a large volume, and is sounded by vibration.

 Summary of the invention

In order to solve the above problems of the prior art, the present invention proposes a sound-amplified acoustic guitar that no longer uses the external speaker system to amplify, but enhances the volume by enhancing the vibration of the acoustic guitar body panel.

The sound reinforcement acoustic guitar proposed by the invention comprises a resonance box composed of upper and lower panels and side panels, a sound hole disposed on the upper panel, a string located above the sound hole, and a bridge for fixing the end of the string, and The invention comprises a sound collecting device for converting the mechanical vibration of the string into an electrical signal, an audio amplifying module for amplifying the electrical signal, converting the amplified electrical signal into mechanical vibration and transmitting the vibration to the upper and lower panels of the resonance box. Device, a power module for providing power.

The above technical solution has three specific embodiments. In the first embodiment, the vibration enhancing device adopts at least one voice coil motor for enhancing vibration of the lower panel, and the voice coil motor is suspended from the lower panel by a bracket fixed to the side plate. Upper side, one end surface of the voice coil motor is fixedly connected to the bracket through a stator, and the other end surface is fixedly connected to the lower panel through a rotor, and the stator of the voice coil motor does not contact the lower panel. In the second embodiment, the first embodiment is extended to enhance the vibration of the strings and transmit them to the upper and lower panels, respectively, using two voice coil motors and corresponding ones for fixing the two voice coil motors. a bracket, in this embodiment, the bridge does not touch the upper panel, through an external L The bracket is fixed above the upper panel to avoid positive feedback whistling. The third embodiment is identical in structure and principle to the second embodiment, but the vibration enhancing device employs a power actuator which is generally cylindrical and has upper and lower end faces that directly contact the upper and lower panels, and may not require a bracket. Fixed, so the structure is more concise.

The invention can significantly increase the volume of the acoustic guitar without affecting the shape and original structure of the traditional acoustic guitar, so that it matches the singer's singing or other instruments such as violin, piano, wind instrument, percussion, etc. The degree allows the guitar to be easily matched with other instruments without the need for an external sound reinforcement system, forming a variety of musical expressions such as duo, multiple or band concerto, which greatly enriches the breadth and depth of guitar music. Moreover, the invention has less influence on the weight of the body, and does not need an external audio cable, whether it is playing or carrying, and is convenient. The guitar sound of the invention is still derived from the vibration of the body panel itself, rather than the sound of the external speaker, the sound is natural and true, and meets the high requirements of the most serious musicians on the original sound quality of the instrument. The size of the guitar is completely controlled by the player's playing strength, and is not affected by factors other than the body. It is very convenient for the player to control and allows the player to express the music as he pleases.

DRAWINGS

 1 is a schematic structural view of a first embodiment of the present invention;

 Figure 2 is a schematic structural view of a second embodiment of the present invention;

 Figure 3 is a schematic view showing the structure of a third embodiment of the present invention.

detailed description

 The working process of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

 The structure of the acoustic guitar usually includes a head, a neck and a resonance box 10 which are arranged in sequence, and the resonance box 10 includes upper and lower panels and side panels, and a resonance box. The upper panel 6 of 10 is provided with a sound hole 5, and one side of the sound hole 5 is provided with a bridge 3, and one end of the string 1 is fixed to the head, the middle passes through the sound hole 5, and the other end is connected with the bridge 3 When the strings vibrate, the upper and lower panels 7 of the resonance box 10 are vibrated, and vocal music of different tone tones is generated in the resonance box 10.

 The sound reinforcement acoustic guitar proposed by the invention is based on the existing acoustic guitar, and the sound pickup device 2 and the audio amplification module are added. And a vibration augmentation device, and a power module (not shown) that supplies power to each device and module.

 Sound pickup device 2 The high-fidelity mechanical vibration of the strings can be converted into electrical signals, which must have a wide dynamic range to accommodate the musician's different levels of musical performance. And it is very sensitive to the vibration of the strings and is very insensitive to the vibration of the upper and lower panels to prevent the sound pickup device 2 Amplify the upper and lower panels and feed them back to the upper and lower panels to form a positive feedback whistle. In the present invention, the pickup device 2 can be realized by a piezoelectric ceramic rod which is currently connected to the bridge 3 in the electric box.

 Audio amplification module 8 pickup device 2 The electrical signal is preamplified and amplified, and sent to the vibration augmentation device to drive the upper and lower panels to vibrate to achieve sound amplification.

 The vibration enhancing device can be placed in one or more of the resonance boxes 10 The internal power actuator is composed. The power actuator can be electromagnetic or piezoelectric. One end face of the power actuator and the upper panel 6 Connected, the other end face is connected to the side panel portion of the resonance box, or the two end faces of the power actuator are respectively associated with the upper panel 6 and the lower panel of the resonance box 10 Connected. Thus, when the power actuator is energized, the power actuator contracts or expands in a direction perpendicular to the upper and lower panels, causing the upper and lower panels to generate mechanical vibration. The amplitude of the vibration is much larger than the vibration of the upper and lower panels caused by the vibration of the strings of the ordinary acoustic guitar, thus achieving a remarkable sound amplification effect.

 The power module includes a rechargeable battery pack and related electronic control circuits. The rechargeable battery pack stores the battery for a long time, such as 2 to 3 The time of the normal concert, while the weight of the battery pack does not significantly increase the overall weight of the guitar, affecting the portable properties of the guitar.

 Figure 1 shows a first embodiment of the invention, in this embodiment only the lower panel 7 The vibration is enhanced. This embodiment minimizes the modification of the traditional guitar structure and can be directly implemented by modifying a conventional acoustic guitar, and the sound amplification effect can be achieved to a certain extent. In this embodiment, a voice coil motor 9 is used as a sound hole. On the lower back plate of 5, the voice coil (male) end face of the voice coil motor 9 is bonded to the back plate, the other permanent magnet (stator) end face is bonded to one bracket 4, and the other end of the bracket 4 is fixed to the side plate. , voice coil motor 9 The stator does not touch the lower panel 7 . In the present embodiment, the bracket 4 can be arranged in an L shape, or a weight can be added to the end faces of the permanent magnets without fixing the bracket, and the structure is more simplified. When the voice coil motor 9 When powered, it can effectively drive the lower panel 7 to vibrate. The vibration of the strings is converted into an electrical signal by the pickup device 2 placed on the bridge 3 and sent to the audio amplification module 8, and then sent to the voice coil motor 9 and passed through the voice coil motor. 9 Drive the lower panel 7 to vibrate for volume enhancement. The vibration of the upper panel of the guitar 6 is still directly driven by the strings through the bridge 3 . This scheme has small changes to the traditional guitar structure and is easy to implement, but due to the sound pickup device 2 Directly connected to the upper panel 6, in order to avoid positive feedback whistling, the upper panel 6 cannot be subjected to vibration enhancement, and only the lower panel can be selected. A certain degree of vibration enhancement is implemented, so the second and third embodiments after the enhancement effect are relatively limited, but the problem of the small volume of the acoustic guitar can still be effectively solved.

 figure 2 A second embodiment of the present invention is given. In order to effectively avoid positive feedback howling, the bridge portion must be separated from the panel and suspended above the panel. Qinma 3 through an L-shaped bracket 12 and resonance box 10 The side panels are fixed. This structure will ensure that the pickup device 2 can only pick up the vibration of the strings and cannot pick up the vibration of the panel. Vibration enhancement of the panel and backplane through two voice coil motors respectively 9 To achieve, the voice coil (male) end faces of the two motors are respectively bonded to the panel and the back plate, and the other two permanent magnet (stator) end faces are respectively bonded to an H-shaped bracket through the H-shaped bracket 11 and the resonance box 10 The outer side plate is fixed. When the string vibration signal picked up by the pickup device 2 is applied to the voice coil motor 9 by the audio power amplification, the voice coil motor 9 drives the upper panel 6 and the lower panel 7 Vibrate at the same time, producing a loud volume. At the same time, since the string vibration no longer drives the panel vibration, the decay duration of the string vibration is significantly increased, which makes the guitar's sustaining sound longer and the music more singular.

 Fig. 3 shows a third embodiment of the present invention, the principle of which is the same as that of the second embodiment, but the voice coil motor and H The bracket is replaced by a columnar piezoelectric ceramic laminated actuator 13, and the upper and lower end faces of the piezoelectric ceramic laminated actuator 13 are respectively associated with the resonance box 10 The upper and lower panels are connected, and the structure is further simplified with respect to the second embodiment. In the present embodiment, the piezoelectric ceramic laminated actuator 13 can also be used. Replace with the corresponding electromagnetic actuator. Piezoelectric actuators and electromagnetic actuators have lower power consumption and lower power consumption than the voice coil motor, which significantly enhances the performance life of the power module.

It should be understood that the above description of the specific embodiments is in no way intended to limit the scope of the invention, and the scope of the invention should be determined by the appended claims.

Claims (8)

A sound-amplified acoustic guitar comprising a resonance box composed of upper and lower panels and side panels, a sound hole disposed on the upper panel, a string located above the sound hole, and a bridge for fixing the end of the string, wherein Also included is a sound pickup device that converts mechanical vibration of the strings into electrical signals, an audio amplification module for amplifying the electrical signals, and converts the amplified electrical signals into mechanical vibrations and transmits them to the upper and lower panels of the resonance box. A vibration augmentation device for providing a power module for a power source.  Claims 1 The sound reinforcement acoustic guitar is characterized in that the vibration enhancement device employs at least one voice coil motor for enhancing vibration of a lower panel, and the voice coil motor is suspended above the lower panel by a bracket fixed to the side panel. One end of the voice coil motor is fixedly connected to the bracket through the stator, and the other end surface is fixedly connected to the lower panel through the rotor, and the stator of the voice coil motor does not contact the lower panel. A sound-amplified acoustic guitar according to claim 1, wherein said voice coil motor is directly opposite to the sound hole. A sound-amplified acoustic guitar according to claim 1, further comprising an L-shaped bracket, said L One side of the bracket is connected to the side panel of the resonance box, and the other side is parallel to the upper panel. The bridge is fixed above the upper panel by the L-shaped bracket and is not in contact with the upper panel.  Claims 4 The sound reinforcement acoustic guitar is characterized in that the vibration enhancement device adopts at least two voice coil motors for respectively enhancing the vibration of the upper and lower panels, and the two voice coil motors are respectively placed by brackets fixed to the side panels. Above the lower plate and below the upper panel, the stators of the two voice coil motors are fixedly connected to the bracket, and the stator does not contact the upper and lower panels, and the rotors of the two voice coil motors are respectively connected to the lower panel and the upper panel.  Claims 4 The sound reinforcement acoustic guitar is characterized in that the vibration enhancement device employs at least one power actuator, and upper and lower end faces of the power actuator are respectively connected to upper and lower panels of the resonance box.  A sound-amplified acoustic guitar according to claim 6, wherein said power actuator is a capacitive actuator or a piezoelectric actuator.  A sound-amplified acoustic guitar according to any one of claims 1 to 7, wherein the sound pickup device is a piezoelectric ceramic rod connected to a bridge.