Loudspeaker test fixture with sound short circuit hole
By designing a test fixture for loudspeakers with acoustic short-circuit holes, and utilizing the combination of a simulated ear and an elastic pad, the problem that the existing 711 simulated ear cannot test loudspeakers with acoustic short-circuit holes is solved, achieving stable and low-cost testing results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2026-04-03
AI Technical Summary
The existing 711 emulator cannot directly test loudspeakers with sound short-circuit holes, and designing emulators for non-standard loudspeakers is costly and difficult.
Design a speaker test fixture with an acoustic short-circuit hole, including an acoustic ear and an elastic pad. The positioning groove and the elastic pad work together to ensure the stable positioning and sealing of the speaker, and the sound channel test is achieved through the sound guide hole.
It enables effective testing of loudspeakers with acoustic short-circuit holes, reduces resonance and sound leakage, improves test stability and sealing, and lowers design costs.
Smart Images
Figure CN224083707U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of loudspeaker testing fixtures, and in particular to a loudspeaker testing fixture with an acoustic short-circuit hole. Background Technology
[0002] For testing in-ear headphones, the 711 coupler is a common testing tool. Couplers are used to reproduce the acoustic performance of the human ear, reflecting its acoustic characteristics; and are regulated by detailed international standards. Today, high fidelity has become a widely accepted term, and corresponding "high-fidelity" (wideband) couplers have emerged—the IEC 711 coupler / ITU-T Type 2 coupler. The physical construction of the IEC 711 coupler initially benefited from the acoustic equivalent circuit diagram model.
[0003] However, the existing 711 acoustic ear is mainly used for testing headphones, so it cannot directly test loudspeakers with acoustic short-circuit holes. The acoustic short-circuit hole is the core component of a loudspeaker with an acoustic short-circuit hole, extending along the axial direction of the loudspeaker unit and passing through the front and rear acoustic cavities to transmit sound waves. How to test the acoustic short-circuit hole when it is a bent hole is a blind spot in the testing of the 711 acoustic ear.
[0004] When testing non-standard loudspeakers, it is necessary to design different simulated ears, but the design is difficult and costly. Utility Model Content
[0005] The main purpose of this invention is to propose a speaker test fixture with an acoustic short-circuit hole, which is designed to work with a 711 acoustic ear to achieve sound testing of the bent acoustic short-circuit hole.
[0006] To achieve the above objectives, this utility model proposes a loudspeaker test fixture with an acoustic short-circuit hole, comprising:
[0007] The acoustic ear has a rectangular positioning groove recessed in its upper wall. The acoustic ear has a test channel. The positioning groove extends into the test channel with a side wing. A first sound measuring hole is provided in the middle of the side wing. A second sound measuring hole penetrates its wall surface. Both the first and second sound measuring holes are located above the test channel.
[0008] An elastic pad, the shape of which is adapted to the positioning groove, is provided in the middle of the elastic pad with a first sound guide hole that mates with the first sound measuring hole.
[0009] The wall surface of the elastic pad is provided with a second sound guide hole that mates with the second sound measuring hole.
[0010] The first sound guide hole is circular, and the second sound guide hole is sheet-like.
[0011] In practical design, when testing a speaker with a sound short-circuit hole, the speaker is placed on an elastic pad to achieve a flexible fit and ensure stable positioning.
[0012] Therefore, the first sound hole and the second sound hole (i.e., the short-circuit hole) of the loudspeaker are respectively inserted into the first sound guide hole and the second sound guide hole, thereby realizing the testing of the two channels by the acoustic ear. Furthermore, by adding this fixture to the existing acoustic ear, the testing of the loudspeaker with the sound short-circuit hole can be realized. Its structure is simple and stable.
[0013] The combination of positioning grooves and elastic pads can effectively reduce resonance during testing while ensuring sealing. Attached Figure Description
[0014] Figure 1 This is a cross-sectional view of the present invention;
[0015] Figure 2 This is a half-sectional schematic diagram of the present invention;
[0016] Figure 3 This is an exploded view of the present invention;
[0017] Figure 4 This is a schematic diagram of the test position for this utility model;
[0018] Figure 5 This is a schematic diagram showing the speaker of this utility model placed behind the fixture.
[0019] In the picture,
[0020] 1 is the acoustic ear, 11 is the positioning slot, 12 is the test channel, and 13 is the card slot.
[0021] 2 is the side wing, 21 is the first sounding hole, and 22 is the second sounding hole.
[0022] 3 is an elastic pad, 31 is the first sound guide hole, and 32 is the second sound guide hole.
[0023] 4 is a stepped groove, and 5 is an upper pressure plate.
[0024] 61 is the first screw, and 62 is the second screw.
[0025] 7 is the stop, 8 is the speaker, and 80 is the short-circuit hole. Detailed Implementation
[0026] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0027] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.
[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0029] like Figures 1 to 5 As shown, a loudspeaker test fixture with an acoustic short-circuit hole includes:
[0030] The acoustic ear 1 has a rectangular positioning groove 11 recessed in its upper wall. The acoustic ear 1 has a test channel 12. The positioning groove 11 extends into the test channel 12 with a side wing 2. The side wing 2 has a first sound measuring hole 21 in its middle and a second sound measuring hole 22 penetrating its wall. The first sound measuring hole 21 and the second sound measuring hole 22 are both located above the test channel 12.
[0031] The elastic pad 3 is shaped to fit the positioning groove 11, and the center of the elastic pad 3 is provided with a first sound guide hole 31 that matches the first sound measuring hole 21.
[0032] The wall surface of the elastic pad 3 is provided with a second sound guide hole 32 that cooperates with the second sound measuring hole 22.
[0033] The first sound guide hole 31 is circular, and the second sound guide hole 32 is sheet-like.
[0034] In practical design, when testing a speaker with a sound short-circuit hole, the speaker is placed on the elastic pad 3 to achieve elastic fit and ensure stable positioning.
[0035] Therefore, the first sound hole and the second sound hole (i.e., the short-circuit hole) of the loudspeaker are respectively connected to the first sound guide hole 31 and the second sound guide hole 32, thereby realizing the testing of two channels by the acoustic ear 1. Thus, by adding this fixture to the existing acoustic ear 1, the testing of the loudspeaker with the sound short-circuit hole can be realized. Its structure is simple and stable.
[0036] The combination of positioning groove 11 and elastic pad 3 can effectively reduce resonance during testing while ensuring sealing.
[0037] Specifically, the elastic pad 3 is a silicone pad, which is of high quality and can effectively reduce resonance. At the same time, it can also mimic the sound quality effect after being worn by a human ear, thus improving the bionic effect.
[0038] In this embodiment of the utility model, a stepped groove 4 is provided at the position of the second sound guide hole 32, which facilitates the installation and positioning of the short-circuit hole and reduces the problem of sound leakage.
[0039] Specifically, the end of the stepped groove 4 is chamfered, which can ensure the locking and positioning of the speaker, while also ensuring a tight seal.
[0040] In this embodiment of the invention, the elastic pad 3 is attached to the positioning groove 11.
[0041] Specifically, the upper wall of the elastic pad 3 is provided with an upper pressure plate 5, which is fixed to the wall of the acoustic ear 1 by a first screw 61. The elastic pad 3 can be installed and fixed by either adhesive or screw fixing.
[0042] In this embodiment of the invention, the second sound guide hole 32 is arranged in an arc shape, thereby providing a larger sound guide area and improving the test effect.
[0043] Specifically, the end wall of the first sound guide hole 31 is provided with a slot 13, which is then positioned with the speaker's solder pad.
[0044] In this embodiment of the present invention, a stop 7 extends upward from the end of the first sound hole 21. The outer peripheral wall of the stop 7 abuts against the end of the elastic pad 3, thereby improving the stability of the installation and reducing the resonance of the first sound hole after the speaker is installed.
[0045] Specifically, the elastic pad 3 is fixed to the positioning groove 11 by the second screw 62.
[0046] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A loudspeaker test fixture with an acoustic short-circuit hole, characterized in that, include: The acoustic ear has a rectangular positioning groove recessed in its upper wall and a test channel. The positioning groove extends toward the test channel with a side wing. A first sound measuring hole is provided in the middle of the side wing, and a second sound measuring hole is provided through its wall. Both the first sound measuring hole and the second sound measuring hole are located above the test channel. An elastic pad, the shape of which is adapted to the positioning groove, is provided in the middle of the elastic pad with a first sound guide hole that mates with the first sound measuring hole. The wall surface of the elastic pad is provided with a second sound guide hole that mates with the second sound measuring hole. The first sound guide hole is circular, and the second sound guide hole is sheet-like.
2. The loudspeaker test fixture with acoustic short-circuit hole as described in claim 1, characterized in that: The elastic pad is a silicone pad.
3. The loudspeaker test fixture with acoustic short-circuit hole as described in claim 1, characterized in that: The second sound guide hole is provided with a stepped groove.
4. The loudspeaker test fixture with acoustic short-circuit hole as described in claim 3, characterized in that: The ends of the stepped groove are chamfered.
5. The loudspeaker test fixture with acoustic short-circuit hole as described in claim 1, characterized in that: The elastic pad is attached to the positioning groove.
6. The loudspeaker test fixture with acoustic short-circuit hole as described in claim 1, characterized in that: The upper wall of the elastic pad is provided with an upper pressure plate, which is fixed to the wall of the acoustic ear by a first screw.
7. The loudspeaker test fixture with acoustic short-circuit hole as described in claim 1, characterized in that: The second sound guide hole is arranged in an arc shape.
8. The loudspeaker test fixture with acoustic short-circuit hole as described in claim 1, characterized in that: The end wall of the first sound guide hole is provided with a slot.
9. The loudspeaker test fixture with acoustic short-circuit hole as described in claim 1, characterized in that: The first sound-measuring hole has an upward-extending stop at its end, and the outer peripheral wall of the stop abuts against the end of the elastic pad.
10. The loudspeaker test fixture with acoustic short-circuit hole as described in claim 1, characterized in that: The elastic pad is fixed to the positioning groove by a second screw.