CN212541877U - Erhu with diaphragm provided with annular integral sound beam - Google Patents

Abstract

A urheen with a leather film provided with an annular integral sound beam, wherein the front end of a musical instrument cylinder is covered with the leather film; the inner surface of the leather membrane is provided with a bridge type sound beam, and the bridge type sound beam is annularly positioned in the middle of the inner surface of the leather membrane to define a central area; an annular area and a plurality of radiation grooves are also formed on the inner surface of the involucra; the annular area surrounds the central area, the radiation grooves are uniformly distributed in a radial shape, the inner surface of the coating on the outer side of the bridge type sound beam is equally divided into a plurality of resonance areas, and the inner ends of the radiation grooves are communicated with the annular area; the radiation groove is concavely arranged on the inner surface of the involucra to form a sound tunnel. The utility model discloses change the involucra into present standard vibration mode by free vibration mode in the past, solved the two-stringed bowed instrument high pitch district from the angle of vibration, sympathetic response, sound production and can not come out, and the low pitch district is muddy mellow and full not enough problem, and practice proves that this improvement design has outstanding substantive characteristics and the technological progress that is showing to obvious technological effect has been obtained.

Description

Erhu with diaphragm provided with annular integral sound beam

Technical Field

The utility model relates to a stringed musical instrument, concretely relates to tunica adventitia is equipped with two-stringed bowed instrument of the integral sound roof beam of annular.

Background

The urheen, a two-stringed huqin, starts in the Tang dynasty and is called "xi qin" in ancient times, which is a traditional Chinese stringed musical instrument. The urheen has soft and beautiful timbre and rich expressive force, is an important musical instrument for national bands, is longer than the lyric melody which is fine and smooth in playing and has the beauty of human voice.

As shown in fig. 1 and 2, the urheen is composed of a barrel 1, a shaft 2 and a music peg 3. Wherein, the barrel 1 is a resonance box of the urheen, and the front end of the barrel is covered with a skin film 0.

The range of a urheen is typically three and a half octaves, with the high range occupying about one half of the range of the urheen, the low range occupying about one seventh of the range of the urheen, and the remaining ranges being mid ranges. The current urheen is limited by the traditional structural design, and the common problems are as follows: the timbre of the high-tone area and the low-tone area is not good, and the due timbre effect of the urheen is not exerted. The specific expression is that the high pitch area is not bright, and the low pitch area is not thick and mellow.

The main reason for this is that the conventional erhu resonator can not satisfy the wide-band vibration from the high range to the low range, i.e. can not adapt to the wide frequency variation resonance and vibration of the high range, the middle range and the low range. Further research shows that the factors influencing the broadband vibration in the resonance box are more, and the factors are mainly the problems of the traditional diaphragm design except for the cylinder body and the sound window. That is, the conventional resonator has an unreasonable membrane design, which is not favorable for the resonator to exhibit good sound wave resonance and vibration from a high-pitched area to a low-pitched area.

Therefore, how to solve the above-mentioned deficiencies of the prior art is a problem to be solved by the present invention.

Disclosure of Invention

The utility model aims at providing a capsule is equipped with two-stringed bowed instrument of integral sound roof beam of annular.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

a urheen with a skin membrane provided with an annular integral sound beam comprises a musical instrument cylinder, a musical instrument rod and a musical instrument tuner; the front end of the piano barrel is covered with a skin membrane;

a bridge type sound beam is arranged on the inner surface of the leather membrane facing the interior of the piano barrel, is annularly positioned in the middle of the inner surface of the leather membrane and defines a central area with the center of the inner surface of the leather membrane;

an annular area and at least two radiation grooves are formed on the inner surface of the coating; the annular area is arranged around the central area and is positioned between the bridge type sound beam and the central area; the radiation grooves are uniformly distributed in a radial shape by taking the center of the horizontal direction of the membrane as a reference, so that the inner surface of the membrane positioned on the outer side of the bridge type sound beam is equally divided into a plurality of resonance areas, and the inner ends of the radiation grooves are communicated with the annular area;

wherein, the radiation groove is concavely arranged on the inner surface of the involucra to form a sound tunnel.

The relevant content in the above technical solution is explained as follows:

1. in the above-mentioned solution, the annular region is disposed around the central region and located inside the bridge-type sound beam, so that the annular region can contribute to collecting the vibration of the central region of the skin. The annular region may be an annular groove.

2. In the above-described aspect, the radiation grooves are radially and uniformly arranged with respect to the center of the horizontal direction of the skin, which helps to quickly transmit the vibration in the central region to the periphery of the skin through the radial sound tunnels (i.e., sound tunnels) formed by the radiation grooves.

3. In the scheme, a supporting sound beam is further arranged on the inner surface of the leather membrane facing the interior of the piano barrel;

the support sound beam is suspended above the bridge type sound beam and comprises a plurality of straight sound beam components, and the straight sound beam components and the radiation grooves are arranged in a one-to-one alignment manner to form a radial support sound beam; and a supporting leg is arranged below each straight bar sound beam component, the supporting legs are supported and positioned in the radiation grooves, and the width of each supporting leg is smaller than that of each radiation groove.

4. In the above scheme, the supporting legs are in the shape of a long and thin strip, and the length direction of the supporting legs corresponds to the length direction of the radiation grooves. Borrow this design, can avoid producing the jam to the sound tunnel, when guaranteeing to support that the sound roof beam supports the involucra middle part and strengthen the effect, avoid producing adverse effect to the transmission of vibration.

5. In the above solution, the sound supporting beam further has a central supporting leg, and the central supporting leg supports and is positioned at the center of the central area of the skin membrane. Therefore, the design is favorable for further enhancing the strength of the low sound zone of the leather membrane, and further the bass tone color and tone quality of the urheen can be further improved.

6. In the above scheme, still include a becket, this becket pressfitting the involucra with the junction of musical instrument section of thick bamboo for the connection of fastening involucra and musical instrument section of thick bamboo reduces the influence of air temperature and humidity change to involucra rate of tension.

7. In the above scheme, the bottom of the bridge-type sound beam is provided with a bridge opening, the bridge opening penetrates in the width direction of the bridge-type sound beam, and the opening below the bridge opening corresponds to the radiation groove.

8. In the scheme, the diaphragm is divided into a peripheral high-pitch area, a middle-pitch area and a central low-pitch area from a sound frequency band; the wall thickness of the skin film is gradually increased from outside to inside, the wall thickness of a low sound zone is larger than that of a middle sound zone, and the wall thickness of the middle sound zone is larger than that of a high sound zone; the bridge type sound beam is located in the bass region.

By means of the design, the bridge type sound beam is used for reinforcing the low-frequency area of the membrane, so that low-frequency vibration with lower frequency and larger amplitude can generate more muddy and smooth low sound in the low-frequency area of the membrane; the middle-tone area of the skin membrane is reinforced through the support sound beam, so that the tone quality and tone quality of the skin membrane in the middle-tone area can be improved; through setting up thinner high pitch district in the position of keeping away from the involucra center, can make the frequency higher, the less high-frequency vibration of amplitude send more penetrating, bright high pitch at the high pitch district of involucra, and then make the urheen all obtain effectively promoting at tone quality, the tone quality that full frequency channel produced.

9. In the above aspect, the thickness of the central region of the coating is larger than the thickness of the other regions of the coating. By means of the design, the thick bass zone is arranged in the center of the leather membrane, and the strengthened bass zone is beneficial to further improving the bass tone color and tone quality of the urheen.

10. In the above aspect, when the diaphragm is horizontal, the center line of the bridge-type sound beam in the up-down direction overlaps the center line of the diaphragm in the up-down direction, so as to improve sound quality and timbre.

11. In the above scheme, the annular region is an annular groove. Each radiation groove and the annular groove are arc-shaped grooves, so that the thickness of the leather membrane is reduced as much as possible, and the resonance and vibration of the leather membrane are prevented from being influenced.

12. In the above scheme, smooth transition surfaces are arranged between the outer ends of the radiation grooves and the surface of the membrane, so that the vibration is transmitted to the periphery of the membrane more uniformly.

The utility model discloses a theory of operation and advantage as follows:

the utility model relates to a urheen with a leather film provided with an annular integral sound beam, the front end of a musical instrument cylinder is covered with the leather film; the inner surface of the leather membrane is provided with a bridge type sound beam, and the bridge type sound beam is annularly positioned in the middle of the inner surface of the leather membrane to define a central area; an annular area and a plurality of radiation grooves are also formed on the inner surface of the involucra; the annular area surrounds the central area, the radiation grooves are uniformly distributed in a radial shape, the inner surface of the coating on the outer side of the bridge type sound beam is equally divided into a plurality of resonance areas, and the inner ends of the radiation grooves are communicated with the annular area; the radiation groove is concavely arranged on the inner surface of the involucra to form a sound tunnel.

Compared with the prior art, the utility model discloses the involucra design to current two-stringed bowed instrument, especially two-stringed bowed instrument is improved in order to solve current two-stringed bowed instrument and can't compromise the problem that high, well, bass district possess good sympathetic response tone quality simultaneously. The concrete aspects are as follows: firstly, erecting a bridge type sound beam on the inner surface of the skin; secondly, a radial groove is arranged on the inner surface of the skin membrane, so that a radial sound tunnel is formed on the inner surface of the skin membrane.

The utility model discloses to the bright not come out in current two-stringed bowed instrument high pitch district, and the not enough problem of low pitch district muddy and mellow, carried out deep discussion and research to the design and the vocal mechanism of two-stringed bowed instrument, found out the not good leading reason of tone quality in current two-stringed bowed instrument high pitch district and low pitch district because the involucra design is unreasonable to be sent. In view of the above, the inventor has broken the constraint that the two-stringed bowed instrument constitutes the design in the past, and the bold has proposed the utility model discloses an improved design scheme, this kind of improved design scheme change the involucra into present standard vibration mode by the free vibration mode in the past, from the angle of vibration, sympathetic response, sound production solved two-stringed bowed instrument high sound zone bright can not come out, and the low sound zone is muddy mellow and not enough problem, practice proves that this improved design scheme has outstanding substantive characteristics and apparent technological progress to obvious technological effect has been obtained.

The utility model discloses especially improve the involucra to the comparatively outstanding bass district tone quality problem of current urheen, compensatied the range short slab of urheen, widened composer's creation width.

Because of the application of above-mentioned technical scheme, the utility model discloses compare with current two-stringed bowed instrument and have following advantage and effect:

1. the utility model discloses set up bridge type sound roof beam on the involucra internal surface, because the relative high pitch amplitude of bass is big, the frequency is low, the bass sympathetic response is concentrated in the central zone of involucra, and the high pitch sympathetic response is concentrated in the edge region all around of involucra, strengthens involucra central zone intensity, has played important effect to improving bass district tone color and tone quality. The thickness of the membrane is a structure with thick central area and thin periphery, so that the strength of the central area of the membrane is enhanced, the thickness difference between the central area and the periphery area of the membrane is relatively changed, and the membrane also has a beneficial effect on improving the tone color and tone quality of a high-pitched sound.

2. The utility model discloses be equipped with radial slot on the involucra internal surface, this radial slot actually forms radial sound tunnel on the internal surface of involucra, and the vibration is collected by the annular region on the involucra to through the transmission of radial sound tunnel (the tunnel of sound promptly) to the edge all around of involucra rapidly, this has played the key role to tone quality and the tone quality that improves the high pitch zone.

3. The utility model discloses a bridge type sound roof beam and the design of radial slot, when the quantity of radiation slot is four, can be on the involucra the partition four sympathetic response regions. When the urheen is played, the vibration of the strings is firstly transmitted to the central area of the membrane, then transmitted to each resonance area through the sound tunnel, and resonance and vibration are generated, so that the string sound is amplified into the resonance sound of the membrane. The improved Erhu can only generate three sound wave quantities when playing, namely, a corresponding area of the leather diaphragm is a resonance area, the resonance area generates one sound wave quantity, one string wave quantity is added, and one percussion wave quantity is added, so that the three sound wave quantities are counted. And after improving the utility model discloses can produce six sound wave volume when the urheen is played, wherein, four sympathetic response regions produce four sound wave volumes, in addition a string wave volume, in addition a percussion wave volume counts six sound wave volumes altogether.

The sound volume, i.e., the number of sound waves, for a specific stringed instrument depends mainly on the number of resonance regions of the membrane, in addition to one string volume and one percussion volume, and in general, the instrument generates one sound volume per resonance region during playing, and how many sound volumes are generated by how many resonance regions. In addition, the sound volume directly affects the timbre, penetration and volume of the instrument. Therefore, the design of the invention can obviously improve the timbre of the high-tone area and the low-tone area and increase the penetrating power of the high-tone area and the low-tone area.

Drawings

Fig. 1 is a schematic structural diagram of a conventional erhu;

fig. 2 is a schematic cross-sectional view of a barrel of a conventional urheen;

FIG. 3 is a schematic sectional view of the barrel of the present invention;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic structural view of a supporting beam according to an embodiment of the present invention;

fig. 6 is a cross-sectional view of fig. 5.

In the above drawings: 0. a skin membrane; 1. a barrel; 2. a musical instrument rod; 3. music instrument tuner; 4. a skin membrane; 5. a bridge-type sound beam; 6. a support sound beam; a straight sound beam member; 6b, supporting the feet; 6c, supporting the foot in the center; 7. a central region; 8. an annular region; 9. a radiating trench; 10. a resonance region; 11. a bridge opening; 12. a metal ring.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

example (b): the present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the disclosure may be shown and described, and which, when modified and varied by the techniques taught herein, can be made by those skilled in the art without departing from the spirit and scope of the disclosure.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms "a", "an", "the" and "the", as used herein, also include the plural forms.

As used herein, "connected" or "positioned" refers to two or more elements or devices being in direct physical contact with each other or in indirect physical contact with each other, and may also refer to two or more elements or devices being in operation or acting on each other.

As used herein, the terms "comprising," "including," "having," and the like are open-ended terms that mean including, but not limited to.

As used herein, the term (terms), unless otherwise indicated, shall generally have the ordinary meaning as commonly understood by one of ordinary skill in the art, in this written description and in the claims. Certain words used to describe the disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the disclosure.

Referring to fig. 3-6, an erhu with a skin membrane provided with an annular integral sound beam comprises a barrel 1, a rod 2 and a tuning peg 3; the front end of the piano barrel 1 is covered with a skin 4.

Wherein, the inner surface of the leather membrane 4 facing the interior of the piano tube 1 is provided with a bridge type sound beam 5 and a support sound beam 6; the bridge-type sound beam 5 is annular and is positioned in the middle of the inner surface of the skin 4, and defines a central area 7 with the center of the inner surface of the skin 4.

An annular area 8 and four radiation grooves 9 are formed on the inner surface of the membrane 4; the annular region 8 may be an annular groove disposed around the central region 7 and between the bridge beam 5 and the central region 7, which helps the annular region 8 to focus the vibrations of the central region 7 of the membrane 4.

The radiation groove 9 is concavely arranged on the inner surface of the skin 4 to form a sound tunnel. The radiation grooves 9 are uniformly arranged in a radial shape with the center of the horizontal direction of the coating 4 as a reference, and contribute to rapidly transmitting the vibration of the central region 7 to the periphery of the coating 4 through a radial sound tunnel formed by the radiation grooves 9. The inner end of each radiation groove 9 is communicated with the annular area 8, so that the inner surface of the skin 4 positioned outside the bridge-type sound beam 5 is equally divided into a plurality of resonance areas 10. The inner end of each radiating groove 9 communicates with the annular region 8.

The support sound beam 6 is suspended above the bridge-type sound beam 5, the support sound beam 6 is cross-shaped and comprises four straight sound beam components 6a, and the straight sound beam components 6a and the radiation grooves 9 are arranged in one-to-one alignment to form a radial shape of the support sound beam 6; wherein, each straight sound beam component 6a has a supporting foot 6b below, the supporting foot 6b is supported and positioned in each radiation groove 9, and the width of the supporting foot 6a is smaller than the width of the radiation groove 9.

Preferably, the supporting feet 6a are elongated and correspond to the longitudinal direction of the radiating groove 9 in the longitudinal direction. Can avoid producing the jam to the sound tunnel, when guaranteeing to support 4 middle parts of involucra of sound roof beam 6 and support the enhancement effect, avoid producing adverse effect to the transmission of vibration.

Preferably, the piano handle further comprises a metal ring 12, wherein the metal ring 12 is pressed at the joint of the membrane 4 and the piano barrel 1 and is used for fastening the connection of the membrane 4 and the piano barrel 1 and reducing the influence of air temperature and humidity change on the tension of the membrane 4.

Preferably, the skin 4 is divided into a peripheral high-pitch region, a middle-pitch region and a central low-pitch region from the sound frequency band; the wall thickness of the skin 4 is gradually increased from outside to inside, the wall thickness of a low sound zone is larger than that of a middle sound zone, and the wall thickness of the middle sound zone is larger than that of a high sound zone; the bridge sound beam 5 is located in the bass region, and the support sound beam 6 may be located in the midrange region. By means of the design, the bass region of the membrane 4 is strengthened through the bridge type sound beam 5, so that low-frequency vibration with lower frequency and larger amplitude can generate more muddy and smooth bass in the bass region of the membrane 4; the middle-tone area of the skin membrane 4 is reinforced by the support sound beam 6, so that the tone color and tone quality of the skin membrane 4 in the middle-tone area can be improved; through setting up thinner high pitch district in the position of keeping away from 4 centers of involucra, can make the frequency higher, the less high frequency vibration of amplitude send more penetrating, bright high pitch at the high pitch district of involucra 4, and then make the erhu all obtain effective promotion at tone quality, tone quality that full frequency channel produced.

Preferably, the thickness of the central region 7 of the coating 4 is larger than the thickness of the other regions of the coating 4. By this design, the bass zone after reinforcement contributes to further improving the bass tone color and tone quality of the urheen by arranging the thick bass zone at the center of the skin membrane 4.

Preferably, the supporting beam 6 further has a central supporting leg 6c, and the central supporting leg 6c is positioned at the center of the central area 7 of the membrane 4 to further enhance the bass zone intensity of the membrane 4, so as to further improve the bass tone and the quality of the urheen.

The bottom of the bridge-type sound beam 5 is provided with a bridge opening 11, the bridge opening 11 penetrates through the bridge-type sound beam 5 in the width direction, and an opening below the bridge opening 11 corresponds to the radiation groove 9. Borrow this design, through erectting bridge type sound roof beam 5 more be favorable to through sound tunnel transmission vibration on the sound tunnel to more be favorable to promoting the vibration response rate of involucra 4.

Preferably, when the membrane 4 is horizontal, a vertical center line of the bridge sound beam 5 and a vertical center line of the membrane 4 overlap each other.

Preferably, the annular groove and each radiation groove 9 are arc-shaped grooves, so that the thickness of the skin 4 is reduced as much as possible, and resonance and vibration of the skin 4 are prevented from being influenced.

Wherein, smooth transition surfaces are arranged between the outer end of the radiation groove 9 and the lower surface of the leather diaphragm 4. So that the vibration is transmitted more uniformly to the peripheral portion of the film 4.

Other embodiments and structural changes of the present invention are described below as follows:

1. in the above embodiments, the illustrated urheen is only used as an example, the structure is not intended to limit the protection scope of the present invention, and other urheens with similar structures should be covered by the protection scope of the present invention if the technical features of the present invention are adopted.

2. In the above embodiment, the bridge-type sound beam 5 is provided with the bridge hole 11, but the present invention is not limited thereto, and the bridge hole 11 may not be provided, or other structures similar to the bridge hole 11 may be provided to facilitate the transmission of the vibration through the sound tunnel, which is easily understood and accepted by those skilled in the art.

3. In the above embodiments, the number of the bridge-type sound beams 5 is not limited to one, and may be a plurality of bridge-type sound beams arranged in parallel or other designs that help to reinforce the load in the middle of the membrane 4, which is easily understood and accepted by those skilled in the art.

4. In the above embodiment, the annular groove and the radiation groove 9 are arc-shaped grooves. However, the present invention is not limited thereto, and the annular groove and the radial groove 9 may be designed into other shapes, such as a V-shaped, U-shaped, W-shaped, and other concave structures. As would be readily understood and accepted by those skilled in the art.

The utility model discloses to the bright not come out in current two-stringed bowed instrument high pitch district, and the not enough problem of low pitch district muddy and mellow, carried out deep discussion and research to the design and the vocal mechanism of two-stringed bowed instrument, found out the not good leading reason of tone quality in current two-stringed bowed instrument high pitch district and low pitch district because the involucra design is unreasonable to be sent. In view of the above, the inventor has broken the constraint that the two-stringed bowed instrument constitutes the design in the past, and the bold has proposed the utility model discloses an improved design scheme, this kind of improved design scheme change the involucra into present standard vibration mode by the free vibration mode in the past, from the angle of vibration, sympathetic response, sound production solved two-stringed bowed instrument high sound zone bright can not come out, and the low sound zone is muddy mellow and not enough problem, practice proves that this improved design scheme has outstanding substantive characteristics and apparent technological progress to obvious technological effect has been obtained.

The utility model discloses especially improve the involucra to the comparatively outstanding bass district tone quality problem of current urheen, compensatied the range short slab of urheen, widened composer's creation width.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (10)

1. The utility model provides a capsule is equipped with two-stringed bowed instrument of integral sound roof beam of annular which characterized in that:

consists of a piano cylinder (1), a piano rod (2) and a piano tuner (3); the front end of the piano barrel (1) is covered with a skin (4);

a bridge type sound beam (5) is arranged on the inner surface of the leather membrane (4) facing the interior of the piano barrel (1), the bridge type sound beam (5) is annular and is positioned in the middle of the inner surface of the leather membrane (4), and a central area (7) is defined by the center of the inner surface of the leather membrane (4);

an annular area (8) and at least two radiation grooves (9) are formed on the inner surface of the coating (4); the annular area (8) is arranged around the central area (7) and is positioned between the bridge type sound beam (5) and the central area (7); the radiation grooves (9) are uniformly distributed in a radial shape by taking the center of the horizontal direction of the membrane (4) as a reference, so that the inner surface of the membrane positioned on the outer side of the bridge-type sound beam (5) is equally divided into a plurality of resonance areas (10), and the inner ends of the radiation grooves (9) are communicated with the annular area (8);

wherein, the radiation groove (9) is concavely arranged on the inner surface of the involucra (4) to form a sound tunnel.

2. A urheen having a membrane provided with an annular integral beam according to claim 1, wherein: the inner surface of the leather membrane (4) facing the interior of the piano barrel (1) is also provided with a supporting sound beam (6);

the support sound beam (6) is suspended above the bridge-type sound beam (5), the support sound beam (6) comprises a plurality of straight sound beam components (6 a), and the straight sound beam components (6 a) and the radiation grooves (9) are arranged in a one-to-one alignment mode to form a radial shape of the support sound beam (6); wherein, each straight bar sound beam component (6 a) is provided with a supporting foot (6 b) below, the supporting foot (6 b) is supported and positioned in each radiation groove (9), and the width of the supporting foot (6 b) is smaller than that of the radiation groove (9).

3. A urheen having a membrane provided with an annular integral beam according to claim 1, wherein: the piano handle further comprises a metal ring (12), and the metal ring (12) is pressed at the joint of the membrane (4) and the piano barrel (1).

4. A urheen having a membrane provided with an annular integral beam according to claim 1, wherein: the bottom of the bridge-type sound beam (5) is provided with a bridge opening (11), the bridge opening (11) penetrates in the width direction of the bridge-type sound beam (5), and the opening below the bridge opening (11) corresponds to the radiation groove (9).

5. A urheen having a membrane provided with an annular integral beam according to claim 2, wherein: the supporting legs (6 b) are in a shape of a long and thin strip, and the length direction of the supporting legs corresponds to the length direction of the radiation grooves (9).

6. A urheen having a membrane provided with an annular integral beam according to claim 1, wherein: the leather membrane (4) is divided into a peripheral high-pitch area, a middle-pitch area and a central low-pitch area from a pronunciation frequency band;

the wall thickness of the membrane (4) is gradually increased from outside to inside, the wall thickness of a low-sound area is larger than that of a middle-sound area, and the wall thickness of the middle-sound area is larger than that of a high-sound area;

wherein the bridge sound beam (5) is positioned in the bass region.

7. A urheen having a membrane provided with an annular integral beam according to claim 2, wherein: the supporting sound beam (6) is also provided with a central supporting leg (6 c), and the central supporting leg (6 c) is supported and positioned at the center of the central area (7) of the skin membrane (4).

8. A urheen having a membrane provided with an annular integral beam according to claim 1, wherein: when the membrane (4) is horizontal, the center line of the bridge-type sound beam (5) in the vertical direction is overlapped with the center line of the membrane (4) in the vertical direction.

9. A urheen having a membrane provided with an annular integral beam according to claim 1, wherein: the annular region (8) is an annular groove, and each radiation groove (9) and the annular groove are arc-shaped grooves.

10. A urheen having a membrane provided with an annular integral beam according to claim 1, wherein: and a smooth transition surface is arranged between the outer end of the radiation groove (9) and the surface of the involucra (4).

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