CN104113796B - Improved structure of passive radiation type sound box - Google Patents

Abstract

An improved structure of passive radiation type sound box is prepared as forming an inner cavity and a sound guide channel by box body through partition plate, setting air outlet connected to sound guide channel on surface of box body, setting passive radiation unit between partition plate and surrounding said speaker unit in said inner cavity by partition plate and passive radiation unit.

Description

Improved Structure of Passive Radiation Speakers

technical field

The present invention relates to an improved structure of a passive radiating sound box, in particular to a method capable of improving the problems of wind-cut sound and low-frequency control that occur in the reflective sound box and the passive radiating sound box.

Background technique

Generally, the speaker unit or speaker unit is a complex of mass, elasticity and damping. When the unit vibrates, sound waves are generated. The principle is to generate vibration by the elasticity of its suspension system. If the speaker unit is installed in the speaker, because there is air in the speaker, and the air itself has quality, when the speaker unit generates sound pressure and compresses the air in the speaker, it is as if the air is in a state of pressure waves in the speaker. marching.

Now, in order to make the sound box achieve better effects, passive sound boxes and reflective sound boxes are designed, wherein the passive sound box 1 is shown in Figure 1A and Figure 1B, and at least one passive element 12 is arranged in a closed sound box environment. , and the passive element 12 is arranged behind the loudspeaker unit 11 or on the same plane as the loudspeaker unit, so that the damping effect in the passive sound box 1 can be increased, and the sound pressure in the passive sound box 1 can be buffered to reduce the noise of the loudspeaker unit 11. The passive speaker box vibrates when the sound is produced, and effectively improves its low-frequency effect.

And another kind of reflective sound box 2 is to set an echo tube 22 with opening 221 on the sound box, as shown in Figure 2A and Figure 2B, then be respectively arranged on the same side or different sides of the speaker unit 21 Therefore, when the speaker unit 21 vibrates, the echo tube 22 can enhance the low volume of the bass due to the sound pressure generated by the air squeezed inside the speaker, so that the reflective speaker 2 can have a good resonance performance.

However, the above two kinds of speakers (passive speakers and reflective speakers) must be well planned and designed for passive components or echo tubes. For reflective speakers, the size, position and The shape will affect the change of low frequency, so when designing a passive speaker or a reflective speaker, if there is a bad design, it will easily have a major impact on the overall efficiency of the speaker and the timbre orientation. Therefore, the passive speaker and the reflective speaker The design is particularly complicated, so it is very difficult to control, so it is difficult to carry out effective control, so the low-frequency control that can be achieved is limited; and in addition to the above shortcomings, because the control is not easy, it is easy to cause the problem of wind shear in the finished product, so There is an urgent need for a good solution to improve the problems caused by the current passive speakers and reflective speakers.

Therefore, if an improved structure of a passive radiating speaker can be established, the structural features of the passive speaker and the reflective speaker can be combined, and the problems of wind cut and low-frequency control caused by the passive speaker and the reflective speaker can be improved. , which should be an optimal solution.

Contents of the invention

The purpose of the present invention is to provide an improved structure of passive radiating sound box, which is simple in structure and easy to operate, and combines the structural features of passive sound box and reflective sound box, so as to improve the wind shear sound caused by passive sound box and reflective sound box. Problems with poor low frequency control.

In order to achieve the above object, the present invention discloses an improved structure of a passive radiation sound box, wherein the sound box device includes a box body, an inner chamber and a sound guide channel are formed through a partition, and a surface of the box body is provided with a The air outlet connected to the sound guide channel; a passive radiation part, which is provided with a hanging edge at the left and right ends of a vibrating film, and the passive radiating part is arranged between the partition and the partition, so the left and right ends of the vibrating film The hanging edges are all connected to the partition; at least one speaker unit is enclosed in the inner cavity by the partition board and the passive radiation component, and the diaphragm of the speaker unit is combined with the box On one side of the inner chamber of the body, and the passive radiating part is arranged under the speaker unit; when the speaker unit vibrates and emits sound, part of the sound pressure in the inner chamber will pass through the passive radiating part and pass out of the inner cavity. The chamber, along with the sound guide channel, releases the sound pressure from the air outlet.

More specifically, at least one reflective plate can be arranged on the sound guide channel, wherein both ends of the reflective plate are connected to the inner side of the box.

More specifically, the position of the vibrating membrane of the speaker unit is set at an angle of 90 degrees to the position of the passive radiation component.

More specifically, the air outlets are arranged on the surface of the box on different sides of the diaphragm of the loudspeaker unit.

In addition to the above-mentioned implementation structure, the present invention has another implementation structure. The improved structure of the passive radiation sound box includes a box body, an inner chamber and a sound guide channel are formed through a partition, and the surface of the box body There is an air outlet connected to the sound guide channel; a passive radiation part is provided with a hanging edge at the left and right ends of a vibrating film, and the passive radiating part is arranged between the partition and the partition, so the vibrating film The hanging edges at the left and right ends are all connected to the partition; at least one loudspeaker unit is surrounded by the partition board and the passive radiation component in the inner cavity, and the diaphragm of the loudspeaker unit is combined On one side of the inner chamber of the box body, and the passive radiation part is arranged behind the speaker unit; when the speaker unit vibrates and makes sound, part of the sound pressure in the inner chamber will pass through the passive radiation part. out of the inner chamber, and along the sound guide channel, the sound pressure is released through the air outlet.

More specifically, at least one reflective plate can be arranged on the sound guide channel, wherein both ends of the reflective plate are connected to the inner side of the box.

More specifically, the position of the vibrating membrane of the loudspeaker unit is set parallel to the position of the passive radiation component.

More specifically, the air outlet is arranged on the surface of the box on the same side as the diaphragm of the speaker unit.

Through above-mentioned structure, the present invention has realized following technical effect:

1. It not only combines the structural characteristics of passive speakers and reflective speakers, but also can improve the problems of wind cut and low frequency control caused by poor design of passive speakers and reflective speakers.

2. Part of the sound pressure in the inner chamber is transmitted through the passive radiation part, and then through the cooperation of the sound guide channel and the reflector, the part of the sound pressure that is transmitted can pass through the sound guide channel smoothly, and the output The air outlet is transmitted, so it can effectively solve the problem of poor low-frequency control effect.

Description of drawings

Figure 1A: Schematic diagram of the internal structure of a conventional passive speaker.

Figure 1B: Schematic diagram of the internal structure of a conventional passive speaker.

Figure 2A: Schematic diagram of the internal structure of a conventional reflective speaker.

Figure 2B: Schematic diagram of the internal structure of a conventional reflective speaker.

Fig. 3A: Schematic diagram of the internal structure of the first implementation of the improved structure of the passive radiation sound box of the present invention.

FIG. 3B : Schematic diagram of the first implementation of the improved structure of the passive radiation speaker of the present invention to produce vibrations and sounds.

FIG. 4A : a schematic diagram of the internal structure of the second embodiment of the improved structure of the passive radiation sound box of the present invention.

FIG. 4B : a schematic diagram of the second implementation of the improved structure of the passive radiating sound box of the present invention to generate sound through vibration.

FIG. 5A is a frontal measurement waveform diagram of the sound pressure level of the improved structure of the passive radiation speaker of the present invention.

Fig. 5B: The frontal measurement waveform diagram of the sound pressure level of a conventional conventional reflective speaker structure.

FIG. 6A : Waveform diagram of the air outlet measurement of the sound pressure level of the improved passive radiation speaker structure of the present invention.

Fig. 6B: Waveform diagram of the echo tube measurement of the sound pressure level of the traditional reflective speaker structure.

detailed description

The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of preferred embodiments with reference to the drawings.

Please refer to Fig. 3A, which is a schematic diagram of the internal structure of the first embodiment of the improved structure of the passive radiation sound box of the present invention. The chamber 34 and one can be an L-shaped sound guide channel 35, and the surface of the box body 31 is further provided with an air outlet 311 connected to the sound guide channel 35, and the air outlet 311 is arranged on the vibration of the speaker unit 32. The membrane 321 is located on the surface of the box body 31 on a different side; in addition, the partition 33 in the box body 31 has a passive radiation part 36, and the passive radiation part 36 is a vibrating membrane 362 with a hanging edge 361 at the left and right ends, The hanging edges 361 at the left and right ends of the vibrating membrane 362 are connected to the partition plate 33 .

The partition 33 and the passive radiating part 36 can surround at least one loudspeaker unit 32 in the inner chamber 34, since there is an opening on one side of the inner chamber 34 (on the surface of the box body 31), And the diaphragm 321 of the speaker unit 32 is positioned at the opening, so the diaphragm 321 of the speaker unit 32 is combined on one side of the inner chamber 34 of the box body 31, and the passive radiation component 36 is set Below the loudspeaker unit 32, the position where the diaphragm 321 of the loudspeaker unit 32 is set is at an angle of 90 degrees to the position of the passive radiation component 36; as shown in Figure 3B, when the loudspeaker unit 32 vibrates When sounding, part of the sound pressure in the inner chamber 34 will first contact the passive radiating part 36 downwards. Since the passive radiating part 36 is vibrated by the sound pressure, the sound pressure can pass through the inner chamber through vibration. 34, and along the sound guide channel 35, the sound pressure can be released from the air outlet 311.

In addition, it can be seen from FIG. 3A and FIG. 3B that at least one reflective plate 37 can be provided near the sound guide channel 35 of the passive radiating component. The reflective plate 37 is located below the passive radiating component 36. The two ends of the reflective plate 37 It is connected to the inner surface of the box body 31, so when the sound pressure is transmitted from the vibration mode 362 of the passive radiation part 36, the sound pressure can be bounced back to the sound guide channel 35 by the reflector 37, so as to avoid passing the sound pressure. pressure is consumed.

In addition to the first embodiment, there is a second implementation mode, as shown in Figure 4A and Figure 4B, wherein the speaker device 4 also has a box body 41, and the box body 41 can pass through an L-shaped partition. The plate 43 forms an inner chamber 44 and an L-shaped sound guide channel 45. The surface of the box body 41 is also provided with an air outlet 411 connected to the sound guide channel 45, and is arranged on the passive side of the partition plate 43. The radiating part 46 , the passive radiating part 46 is a vibrating membrane 462 with a hanging edge 461 at the left and right ends, and the hanging edges 461 at the left and right ends of the vibrating membrane 462 are connected to the partition 43 .

The difference from the first embodiment is that the position of the diaphragm 421 of the speaker unit 42 of the second embodiment is set parallel to the position of the passive radiation component 46, and the air outlet 411 is set at the position of the speaker unit. The diaphragm 421 of the body 42 is located on the surface of the box body 41 on the same side. As can be seen from FIG. 4B, when the speaker unit 42 vibrates and emits sound, part of the sound pressure in the inner chamber 44 will contact the passive radiation part backwards. 46. Since the passive radiating part 46 is vibrated by the sound pressure, the sound pressure can pass through the inner chamber 44 through vibration, and along the sound guide channel 45, the sound pressure can be released from the air outlet 411 .

In addition, at least one reflection plate 47 can also be arranged at the sound guide channel 45 close to the passive radiation component 46, the reflection plate 47 is located on the side of the passive radiation component 46, and the two ends of the reflection plate 47 are connected to the box body. 41, so that when the sound pressure is transmitted from the vibrating membrane 462 of the passive radiating part 46, the sound pressure can be bounced back to the sound guide channel 45 by the reflector 47, so as to avoid the consumption of sound pressure passing through.

And the measurement of the SPL sound pressure level is carried out with the improved structure of the passive radiation sound box of the present invention and the structure of the traditional reflective sound box, as can be seen from Fig. 5A and Fig. 5B, the measurement of the sound pressure level is carried out at the front, wherein the sound pressure level of the present invention The test results of the improved structure of the passive radiation speaker are shown in Figure 5A. The low frequency can be maintained until 65Hz before dropping down. However, it can be seen from Figure 5B that it is a traditional reflective speaker structure, and the sound pressure level is also measured on the front , but it can be clearly seen from the figure that the low frequency 95Hz starts to drop down. It can be seen from this that the control stability and low frequency extension of the general traditional reflective speaker structure are worse than the improved structure of the passive radiation speaker of the present invention.

In addition to measuring the SPL sound pressure level on the front, it is also possible to conduct a near-sound field test at the air outlet of the improved passive radiation speaker structure of the present invention. It can be seen from Figure 6A that at low frequencies between 53Hz and 310Hz, There is a wide frequency band, but according to the near-sound field test at the echo tube of the traditional reflective speaker structure in Figure 6B, there is a slightly raised frequency band around 120Hz. It can be seen that compared with the general traditional reflective Type sound box structure, the low frequency response of the improved structure of the passive radiation type sound box of the present invention is better, so the low frequency performance is better than the general traditional reflection type sound box structure.

Compared with other conventional technologies, the improved structure of the passive radiation sound box provided by the present invention has the following advantages:

1. The improved structure of a passive radiating sound box of the present invention combines the structural features of the passive sound box and the reflective sound box, and can improve the wind shear sound and low-frequency control problems caused by poor design of the passive sound box and the reflective sound box.

2. The present invention transmits part of the sound pressure in the inner chamber through the passive radiation part, and then through the cooperation of the sound guide channel and the reflector plate, the part of the sound pressure transmitted can pass through the sound guide channel smoothly, and It is transmitted from the air outlet, so it can effectively solve the problem of poor low-frequency control effect.

Through the above detailed description of the preferred embodiments, it is hoped that the features and spirit of the present invention can be described more clearly, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, the intention is to cover various changes and equivalent arrangements within the scope of the claimed patent scope of the present invention.

Claims (8)

1. An improved structure of a passive radiation speaker, characterized in that it comprises: A box body, an inner chamber and a sound guiding channel are formed through a partition, and an air outlet connected to the sound guiding channel is provided on the surface of the box body; A passive radiating part is provided with a hanging edge at the left and right ends of a vibrating membrane, and the passive radiating part is arranged between the partition and the partition, so the hanging edges at the left and right ends of the vibrating membrane are all connected to the partition; at least one loudspeaker unit, the loudspeaker unit is enclosed in the inner chamber by the partition plate and the passive radiation component, and the diaphragm of the loudspeaker unit is combined on one side of the inner chamber of the box, And the passive radiation component is arranged under the speaker unit; When the loudspeaker unit vibrates and makes sound, part of the sound pressure in the inner chamber will pass through the passive radiation part to pass out of the inner chamber, and along the sound guide channel, the sound pressure will be released from the air outlet. Wherein, the partition is an L-shaped partition and is located inside the box, so that the L-shaped sound guide channel is formed while the inner chamber is formed, and the L-shaped sound guide channel It includes two L-shaped straight passages, the passive radiation component is located on the side wall of one of the straight passages, and the air outlet is directly connected to the other straight passage. 2 . The improved structure of passive radiation sound box according to claim 1 , wherein at least one reflective plate can be arranged on the sound guide channel, wherein both ends of the reflective plate are connected to the inner side of the box. 3 . 3 . The improved structure of the passive radiation sound box according to claim 1 , wherein the diaphragm of the speaker unit is disposed at an angle of 90 degrees to the position of the passive radiation component. 4 . 4 . The improved passive radiation sound box structure according to claim 1 , wherein the air outlet is arranged on the surface of the box on the same side as the diaphragm of the speaker unit. 5 . 5. An improved structure of a passive radiation speaker, characterized in that it comprises: A box body, an inner chamber and a sound guiding channel are formed through a partition, and an air outlet connected to the sound guiding channel is provided on the surface of the box body; A passive radiating part is provided with a hanging edge at the left and right ends of a vibrating membrane, and the passive radiating part is arranged between the partition and the partition, so the hanging edges at the left and right ends of the vibrating membrane are all connected to the partition; at least one loudspeaker unit, the loudspeaker unit is enclosed in the inner chamber by the partition plate and the passive radiation component, and the diaphragm of the loudspeaker unit is combined on one side of the inner chamber of the box, And the passive radiation component is arranged behind the speaker unit; When the speaker unit vibrates and produces sound, part of the sound pressure in the inner chamber will pass through the passive radiation part to pass out of the inner chamber, and along the sound guiding channel, the sound pressure will be released from the air outlet, Wherein, the partition is an L-shaped partition and is located inside the box, so that the L-shaped sound guide channel is formed while the inner chamber is formed, and the L-shaped sound guide channel It includes two L-shaped straight passages, the passive radiation component is located on the side wall of one of the straight passages, and the air outlet is directly connected to the other straight passage. 6 . The improved structure of the passive radiation sound box according to claim 5 , wherein at least one reflective plate can be arranged on the sound guide channel, wherein both ends of the reflective plate are connected to the inner side of the box. 7 . 7 . The improved structure of the passive radiation sound box according to claim 5 , wherein the diaphragm of the speaker unit is disposed parallel to the position of the passive radiation component. 8 . 8 . The improved structure of passive radiation sound box according to claim 5 , wherein the air outlet is arranged on the surface of the box on a different side of the diaphragm of the speaker unit. 9 .