CN217280014U

CN217280014U - Electronic Chinese zither

Info

Publication number: CN217280014U
Application number: CN202220694928.4U
Authority: CN
Inventors: 曾迪安
Original assignee: Wuji Legend Shenzhen Technology Co ltd
Current assignee: Wuji Legend Shenzhen Technology Co ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-08-23
Anticipated expiration: 2032-03-28

Abstract

An electronic Chinese zither comprises a Chinese zither body, two microphones, two acquisition audio cables and a sound pickup. Because get the sound microphone with two koto and set up respectively in the preceding sound hole in the koto cavity and in the sound hole top, its characteristic of getting the sound position and coincide koto sound for the audio frequency signal of acquireing can be more true, more natural and more abundant original sound that shows koto when broadcasting. The application discloses electronic zither accords with the applied needs of zither training trade and performance trade, and circuit system not only does not influence the current structure of zither, and simple to operate and simple to use moreover can be of value to the healthy development that promotes the zither trade.

Description

Electronic Chinese zither

Technical Field

The application relates to the field of electronic musical instruments, in particular to an electronic Chinese zither.

Background

The Chinese zither is one of unique plucked instruments in China, the playing music of the Chinese zither is beautiful, and players have rich skills and quite strong music expressive force. With the development of the cultural industry, more and more koto performances appear in various mass performance activities. Because the range of the Chinese zither is wide, and the Chinese zither is a surface sounding musical instrument, the harmonic waves are very rich. The requirements for on-site recording and sound amplification of the Chinese zither sound are very high, and the requirements of a sound pick-up, a sound pick-up method and an electric signal transmission mode after the sound pick-up plays a vital role. Professional performance sites typically use multiple microphones for recording or live sound amplification (usually multiple microphones are placed at the sound hole on the bottom of the zither and directly in front of the bridge of the zither). In the performance activity, in order to make the sound of the koto be heard by more people, the sound pickup is adopted to pick up the sound of the koto, and then the electric signal is transmitted to the tuning system through the signal cable to be adjusted and amplified, and then is transmitted to the transducer (loudspeaker). Most of the domestic mass culture performance activities at present lack of professional standard tuning systems, and a plurality of pickups pick up sound at close range simultaneously, and sound feedback phenomenon and sound pressure low phenomenon appear at the activity scene very easily, and some basic level tuners can also adopt tuning equipment to carry out measures such as compression, amplitude limiting, frequency shift to the signal and sacrifice tone quality to ensure normal sound amplification. Because many string pressing skills exist in the playing process of the Chinese zither, a lot of 'weak tones' are emitted, the tone color and the stability of the 'weak tones' have great relation with the emotional expression of the played music of the Chinese zither, therefore, the Chinese zither recording or sound amplification of most of the existing basic level mass culture activities is realized, professional equipment is limited, and the picked electric signals generate great energy loss and tone color variation in the transmission process, so that the existing tone color of the Chinese zither cannot be really restored, and the popularization and the transmission of the Chinese zither culture in the basic level culture industry are not facilitated.

Disclosure of Invention

The technical problem that this application mainly solved does not have the pickup attachment to zither pronunciation characteristic among the prior art, when the zither plays recording and on-the-spot public address, can not really restore the technical problem of the peculiar tone quality of zither.

According to a first aspect, an embodiment provides an electronic zither, comprising a zither, two microphones, two collecting audio lines and a pickup;

the microphone is used for collecting a sound signal emitted by the koto and converting the sound signal into an audio electric signal; the microphones are arranged in the cavity of the Chinese zither, one microphone is arranged above the front sound hole in the cavity of the Chinese zither, and the other microphone is arranged above the middle sound hole in the cavity of the Chinese zither;

one end of the acquisition audio line is connected with the microphone, and the other end of the acquisition audio line is connected with the sound pick-up; the acquisition audio line is used for transmitting the audio electric signal;

and the sound pick-up is used for amplifying and outputting the audio electric signal.

Further, the sound pickup includes a pre-amplification circuit and a specific frequency adjustment circuit;

the pre-amplifying circuit is used for amplifying the audio electric signal;

and the specific frequency adjusting circuit is used for amplifying and outputting the audio electrical signals of the mute frequency, the tension expression frequency, the surround expression frequency and/or the overtone expression frequency in the amplified audio electrical signals.

Further, the specific frequency adjusting circuit comprises a mute frequency adjusting circuit, a tension expression frequency adjusting circuit, a surround sensation expression frequency adjusting circuit and/or a harmonic overtone expression frequency adjusting circuit;

the mute frequency adjusting circuit is used for amplifying the audio electrical signal of the mute frequency in the amplified audio electrical signal;

the tension expression frequency adjusting circuit is used for amplifying the audio electrical signal with the tension expression frequency in the amplified audio electrical signals;

the surround-sense expression frequency adjusting circuit is used for amplifying the audio electrical signal with the surround-sense expression frequency in the amplified audio electrical signals;

and the harmonic overtone expression frequency adjusting circuit is used for amplifying the audio electrical signal with harmonic overtone expression frequency in the amplified audio electrical signals.

Further, the microphone comprises a sound pickup part and a bearing part; the bearing part is used for bearing the pickup part; an opening is arranged on the bearing part; the sound pickup part is arranged at the opening of the bearing part, collects sound signals emitted by the koto through the opening and converts the sound signals into audio electric signals; one end of the collecting audio line penetrates through the inside of the bearing part to be connected with the pickup part, and the other end of the collecting audio line is connected with the pickup; the material of the bearing part is viscoelastic damping rubber material.

Furthermore, the viscoelastic damping rubber material is a silicon rubber composite damping material; and/or the sound pickup part is an electret microphone.

Furthermore, an opening is formed in a side plate of the Chinese zither.

Further, the adapter set up in outside the cavity of zither, gather the audio line and pass the opening that sets up on the curb plate is connected the adapter with the microphone.

The electronic Chinese zither microphone also comprises an output audio line, wherein the output audio line is connected with the sound pick-up and is used for outputting audio electric signals of the electronic Chinese zither;

the sound pickup is arranged in the cavity of the Chinese zither; one end of the output audio line penetrates through an opening formed in the side plate and is connected with the sound pickup.

Furthermore, one of the two microphones is fixedly connected to the crosspiece closest to the front sound hole in the koto cavity, and the other microphone is fixedly connected to the crosspiece closest to the middle sound hole in the koto cavity.

Further, the microphone also comprises a battery which is used for providing power for the microphone; the sound pickup further comprises a shell, and a circuit of the sound pickup is arranged in the shell.

According to an electronic zither of above-mentioned embodiment, owing to set up two microphones respectively in the internal front sound hole of zither and well sound hole top, its characteristic of getting the sound position and coincide the zither pronunciation for the audio signal who acquires can be more true, more natural and more abundant when broadcasting shows the original sound of zither.

Drawings

Fig. 1 is a schematic view of a zither structure;

fig. 2 is a schematic structural diagram of a zither;

FIG. 3 is a block diagram of an electronic Zheng according to an embodiment;

fig. 4 is a schematic structural diagram of an electronic zither in an embodiment;

fig. 5 is a schematic structural diagram of a microphone of an electronic koto in an embodiment;

FIG. 6 is a schematic circuit diagram of a front end amplifier circuit of a pick-up of an electronic Zheng according to an embodiment;

FIG. 7 is a schematic circuit diagram of a mute frequency adjustment circuit and a tension appearance frequency adjustment circuit of a specific frequency adjustment circuit of a pick-up of an electronic Zheng according to an embodiment;

fig. 8 is a schematic diagram of a circuit board structure of a pickup of an electronic zither in an embodiment;

fig. 9 is a schematic structural diagram of an electronic zither in another embodiment.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The ordinal numbers used herein for the components, such as "first," "second," etc., are used merely to distinguish between the objects described, and do not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

As shown in fig. 1 and fig. 2, the structure of a zheng is schematically illustrated, which includes strings 1, metal trimming parts 2, a panel 3, a goose post 4, a rear mountain 5, a sound through hole 6, a peg 7, a metal plate 8, a rivet 9, a batten 10, a sound outlet 11, a side plate 12, a side plate 13, a bottom plate 14, a crosspiece 15, a base 16, and a bridge 17. The bottom plate 14 is provided with a front sound hole (dragon pool) 18, a middle sound hole (middle dragon pool) 19 and a string penetrating hole, and crosspieces 15 are arranged beside the front sound hole 18 and the middle sound hole 19 in the koto cavity.

In the embodiment of the invention, the two koto sound-taking microphones are respectively arranged above the front sound hole and the middle sound hole in the cavity of the koto, and the sound-taking positions of the two koto sound-taking microphones are matched with the sound-producing characteristic of the koto, so that the original sound of the koto can be displayed more truly, naturally and fully when the obtained audio electrical signal is played.

The first embodiment is as follows:

as shown in fig. 3, the electronic zither in the embodiment of the invention is a block diagram, and includes a zither, two microphones 20, two audio collecting lines, a sound pickup 30, a sound box 40, and a power supply 50. The microphone 20 is used for collecting a sound signal emitted from the koto and converting the sound signal into an audio electric signal. Microphone 20 set up in the cavity of zither, one sets up the preceding sound hole top in the zither cavity, and another sets up the well sound hole top in the zither cavity. One end of the collecting audio line is connected with the microphone 20, and the other end is connected with the sound pickup 30. The acquisition audio line is used for transmitting audio electrical signals. The sound pickup 30 is used to amplify and output an audio electric signal. The sound pickup 30 includes a pre-amplification circuit 35 and a specific frequency adjustment circuit. The pre-amplifier circuit 35 is used to amplify the audio electrical signal. The specific frequency adjusting circuit is used for amplifying and outputting the audio electric signals of the mute frequency, the tension expression frequency, the surround feeling expression frequency and the overtone expression frequency in the amplified audio electric signals. The specific frequency adjusting circuit includes a mute frequency adjusting circuit 31, a tension expression frequency adjusting circuit 32, a surround-sensation expression frequency adjusting circuit 33, and a harmonic-overtone expression frequency adjusting circuit 34. The mute frequency adjusting circuit 31 is configured to amplify the electrical audio signal of the mute frequency in the amplified electrical audio signal. The tension expression frequency adjusting circuit 32 is configured to amplify the audio electrical signal of the tension expression frequency in the amplified audio electrical signal. The surround-sensation expression frequency adjustment circuit 33 amplifies the audio electrical signal of the surround-sensation expression frequency out of the amplified audio electrical signals. The harmonic-overtone expression frequency adjustment circuit 34 is configured to amplify an audio electrical signal of a harmonic-overtone expression frequency out of the amplified audio electrical signals. The electronic zither disclosed in the present application further comprises a sound box 40 and a power supply 50. In one embodiment, the power source 50 may be a battery or a power adapter for providing power to the microphone 30, i.e., for powering the pre-amplification circuit 35 and the specific frequency adjustment circuit. The speaker 40 may be a speaker or a loudspeaker for playing the audio electrical signal output by the specific frequency processing circuit. In one embodiment the enclosure is an active enclosure. Pickup 30 also includes a housing within which the circuitry of pickup 30 is disposed. The shell is provided with a plurality of openings for collecting the connection of the audio line 24, the output audio line and the power line.

As shown in fig. 4, the electronic zither in an embodiment is schematically configured, and includes a microphone 21, a microphone 22, a collecting audio line 24, a collecting audio line 23, a sound pickup 30, and an output audio line 26. Microphone 21 and microphone 22 are respectively disposed in the cavity of the koto, one above the front tone hole 18 in the cavity of the koto, and the other above the middle tone hole 19 in the cavity of the koto. An opening is provided in the side plate 12 of the zither. The sound pickup 30 is disposed in the cavity of the zither. The output audio line 26 is connected to a sound pick-up 30 for outputting an audio electrical signal of the electronic zither. One end of the output audio line 26 passes through an opening provided in the side plate 12 and is connected to the sound pickup 30, and the other end of the output audio line 26 is used for outputting audio signals. In one embodiment, the other end of the output audio line 26 is connected to the active speaker for playing audio electrical signals. And the microphone 21 and the microphone 22, wherein one of the microphones is fixedly connected to the crosspiece 151 closest to the front sound hole 18 in the cavity of the koto, and the other one of the microphones is fixedly connected to the crosspiece 152 closest to the middle sound hole 19 in the cavity of the koto. The pickup audio line 23 and the pickup audio line 24 are connected between the

microphones

21 and 22 and the sound pickup 30, respectively.

As shown in fig. 5, which is a schematic structural diagram of a microphone of an electronic zither in an embodiment, the microphone includes a sound pickup part 41 and a bearing part 42. The bearing member 42 is used for bearing the sound pickup member 41. An opening is provided in the carrier member 42. The sound pickup part 41 is disposed at an opening of the bearing part 42, and collects a sound signal emitted from the koto through the opening, and converts the sound signal into an audio electric signal. The pickup audio line 24 has one end connected to the pickup section 41 through the inside of the carrier section 42 and the other end connected to the pickup 30. The material of the carrier member 42 is a viscoelastic damping rubber material. The pickup audio line 24 is used to transmit an audio electrical signal and output the audio electrical signal to the pre-amplifier circuit 35 of the microphone 30 through the audio connector 44 as a signal input to the pre-amplifier circuit 35. The viscoelastic damping rubber material is at least one of natural synthetic rubber, silica gel, thermoplastic elastomer (TPE) and the like. In one embodiment, the viscoelastic damping rubber material is a silicone rubber composite damping material. In one embodiment, the sound-collecting component 41 is an electret microphone. In one embodiment, the load-bearing member 42 is a structure with viscoelastic damping rubber material integrally poured therein. In one embodiment, the microphone further includes a sponge cover 45, which is disposed at the opening of the bearing member 42.

As shown IN fig. 6, which is a schematic circuit diagram of a front-end amplifying circuit of a microphone of an electronic koto IN an embodiment, the front-end amplifying circuit includes an input terminal IN and an output terminal OUT, and further includes an NE5532 integrated circuit, a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2, and a capacitor C3. The NE5532 integrated circuit comprises a pin 1, a pin 2, a pin 3, a pin 4, a pin 5, a pin 6, a pin 7 and a pin 8, wherein a capacitor 1 is connected between an input end and the pin 3 in series, a resistor R2 is connected between the pin 3 and the ground in series, a resistor R1 and a capacitor C1 are connected between the pin 2 and the ground in series, a resistor R3 and a capacitor C3 are connected between the pin 2 and the pin 1 in series, the pin 1 is connected with an output end OUT, and the pin 8 and the pin 4 are respectively connected with a positive power supply and a negative power supply.

As shown IN fig. 7, a schematic circuit diagram of a mute frequency adjusting circuit and a tension expression frequency adjusting circuit of a specific frequency adjusting circuit of a microphone of an electronic koto according to an embodiment of the present invention includes an input terminal IN and an output terminal OUT, and further includes an NE5532 integrated circuit, a resistor R1, a resistor R3, a resistor R4, a resistor R5, a resistor R7, a resistor R8, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, an adjustable resistor R2, and an adjustable resistor R6. The adjustable resistor R2 and the adjustable resistor R6 respectively comprise two pins with fixed resistance values and one pin with adjustable resistance values. The NE5532 integrated circuit includes pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7 and pin 8, and is a high performance low noise dual operational amplifier (dual operational amplifier) integrated circuit. Similar to many standard operational amplifiers, it has better noise performance, excellent output driving capability, quite high small signal bandwidth, large power supply voltage range and other characteristics. Therefore, the method is suitable for high-quality and professional sound equipment, instruments, control circuits and telephone channel amplifiers. When the audio amplifier is used for audio amplification, the tone is warm, and the fidelity is high. Since the NE5532 integrated circuit is a dual operational amplifier integrated circuit, one NE5532 integrated circuit can build up a tuning circuit for two specific frequencies simultaneously. In one embodiment, an NE5532 integrated circuit builds the tuning circuit for the mute frequency and the tension present frequency. In one embodiment, an NE5532 integrated circuit is configured to adjust the surround-tone frequency and the harmonic-overtone frequency, and the circuit structure is the same, but the selected resistance values are different. In the following, the mute frequency and the tension expression frequency are used as an example to set up the adjusting circuit. The resistor R1, the adjustable resistor R2, the resistor R3 and the capacitor C5 are sequentially connected IN series between the input end IN and the pin 6, the capacitor C4 is connected IN parallel at two ends of the fixed resistance value of the adjustable resistor R2, and the resistor R4 is connected IN series between the adjustable pin of the adjustable resistor R2 and the connecting end of the resistor R3 and the capacitor C5. The resistor R7, the adjustable resistor R6, the resistor R5 and the capacitor C7 are sequentially connected IN series between the input end IN and the pin 2, the capacitor C6 is connected IN parallel at two ends of the fixed resistance value of the adjustable resistor R6, and the resistor R8 is connected IN series between the adjustable pin of the adjustable resistor R6 and the connecting end of the resistor R5 and the capacitor C7. Pin 1 and pin 7 serve as output terminals of the mute frequency adjusting circuit and the tension expression frequency adjusting circuit. The mute frequency adjusting circuit, the tension expression frequency adjusting circuit, the surrounding sense expression frequency adjusting circuit and the overtone expression frequency adjusting circuit can amplify the audio electric signals of corresponding frequencies by setting the values of the resistor and the capacitor in the circuits.

In one embodiment, the bass frequency amplified by the mute frequency adjustment circuit is 6.3 Hz.

In one embodiment, the tension appearance frequency of the tension appearance frequency adjusting circuit is 630 Hz.

In one embodiment, the surround-sense representation frequency amplified by the surround-sense representation frequency adjustment circuit is 6.3 KHz.

In one embodiment, the harmonic-overtone representation frequency amplified by the harmonic-overtone representation frequency adjusting circuit is 63 KHz.

As shown in fig. 8, a schematic diagram of a circuit board structure of a pick-up of an electronic koto in an embodiment includes a pre-amplification circuit area 51, a specific frequency adjustment circuit area 52, a power supply area 53 and an output area 54. The pre-amplifier circuit area 51 includes an NE5532 integrated circuit for amplifying the audio electrical signal. The preamplifier circuit region 51 further includes a headphone jack connected to the headphone connector 44 of the microphone for inputting an audio electrical signal. The specific frequency adjustment circuit area 52 includes two NE5532 integrated circuits for amplifying and outputting the audio electrical signals of the mute frequency, the tension expression frequency, the surround feeling expression frequency, and/or the overtone expression frequency among the amplified audio electrical signals. The power supply area 53 is used for adjusting the voltage of the battery or the battery adapter to supply power to the preamplifier circuit and the specific frequency adjusting circuit. The output section 54 is for connection to the output audio line 26 to output an audio electrical signal.

In one embodiment, the microphone of the electronic koto disclosed in the present application employs an electret microphone with high sensitivity and omni-directional sound pickup, and the bearing component is a viscoelastic high-damping rubber material, and the viscoelastic property of the material itself is utilized to damp and damp structural vibration and noise. And the microphone is arranged right above the front sound hole and the middle sound hole of the Chinese zither for picking up sound, and the characteristics of the Chinese zither for sounding are matched. After the string is stirred, when acoustic information energy is spread in the air, the picking position is most natural and real. And among the prior art, to the picking up of zither sound, adopt SMD or piezoelectric type pickup mostly, be the sounding characteristic that violates the zither, because the sound that SMD or piezoelectric type pickup picked up the zither is not all got from the natural space, but most are got from the sound signal and the many resonance sound of zither panel vibration production of zither panel, so the zither sound of picking up is true sometimes, unnatural and unreal. In an embodiment, the sound pick-up of the electronic koto disclosed by the application adopts an NE5532 integrated circuit as an amplifier, has the characteristics of advanced technology, high stability, low cost, mature circuit process and stable guaranteed electric signals, and can fully show the original sound of the koto during playing.

The application discloses electronic zither accords with the applied needs of zither training trade and performance trade, and circuit system not only does not influence the current structure of zither, and simple to operate and simple to use moreover can be of value to the healthy development that promotes the zither trade.

Example two:

as shown in fig. 9, the electronic koto in another embodiment is a schematic structural diagram, and includes a microphone 21, a microphone 22, a collecting audio line 24, and a collecting audio line 23. An opening is provided in the side plate 12 of the zither. The sound pickup 30 is arranged outside the cavity of the koto. The collecting audio line 24 and the collecting audio line 23 pass through an opening provided in the side plate 12 to connect a sound pickup and a microphone. Microphone 21 and microphone 22 are respectively disposed in the cavity of the koto, one above the front tone hole 18 in the cavity of the koto, and the other above the middle tone hole 19 in the cavity of the koto. And the microphone 21 and the microphone 22, wherein one of the microphones is fixedly connected to the crosspiece 152 closest to the front sound hole 18 in the cavity of the koto, and the other one of the microphones is fixedly connected to the crosspiece 151 closest to the middle sound hole 19 in the cavity of the koto. The collecting audio line 23 and the collecting audio line 24 are connected between the

microphones

21 and 22 and the pickup 30, respectively.

The present application has been described with reference to specific examples, which are provided only to aid understanding of the present application and are not intended to limit the present application. For a person skilled in the art to which the application pertains, several simple deductions, modifications or substitutions may be made according to the idea of the application.

Claims

1. An electronic Chinese zither is characterized by comprising a Chinese zither, two microphones, two acquisition audio lines and a sound pickup;

2. The electronic koto of claim 1, wherein the pickup comprises a pre-amplification circuit and a specific frequency adjustment circuit;

the pre-amplifying circuit is used for amplifying the audio electric signal;

3. The electronic koto according to claim 2, wherein the specific frequency adjusting circuit includes a mute frequency adjusting circuit, a tension expression frequency adjusting circuit, a surround expression frequency adjusting circuit, and/or a overtone expression frequency adjusting circuit;

4. The electronic zither of claim 1, wherein the microphone comprises a pickup member and a carrier member; the bearing part is used for bearing the pickup part; an opening is arranged on the bearing part; the sound pickup part is arranged at the opening of the bearing part, collects sound signals emitted by the koto through the opening and converts the sound signals into audio electric signals; one end of the collecting audio line penetrates through the inside of the bearing part to be connected with the pickup part, and the other end of the collecting audio line is connected with the pickup; the material of the bearing part is a viscoelastic damping rubber material.

5. The electronic koto according to claim 4, wherein the viscoelastic damping rubber material is a silicone rubber composite damping material; and/or the sound pickup part is an electret microphone.

6. The electronic zither of claim 1, wherein an opening is provided in a side plate of the zither.

7. The electronic zither of claim 6, wherein the pickup is arranged outside a cavity of the zither, and the audio line for collecting is connected with the pickup and the microphone through an opening arranged on the side plate.

8. The electronic zither of claim 6, further comprising an output audio line, connected to said pickup, for audio electrical signal output of said electronic zither;

9. The electronic koto of claim 1, wherein two of said microphones, one of which is fixedly attached to the rung closest to the front soundhole in said koto cavity and the other of which is fixedly attached to the rung closest to the middle soundhole in said koto cavity.

10. The electronic koto as in claim 1, further comprising a battery for providing power to said pickup; the sound pickup further comprises a shell, and a circuit of the sound pickup is arranged in the shell.