Positioning device for acoustic detection microphone

Abstract

The utility model provides a microphone positioning device for acoustic detection, and relates to the field of acoustic detection.The microphone positioning device comprises a shell, a winding mechanism arranged in an auxiliary cavity and a flexible ruler used for measuring the distance, a main cavity is formed in the shell, and the main cavity is used for installing a microphone; a through hole is formed in the shell, a plurality of auxiliary cavities are further formed in the shell, a winding mechanism is arranged in each auxiliary cavity, each winding mechanism is provided with a moving end, one end of the flexible ruler is connected with the moving end of the corresponding winding mechanism, and the other end of the flexible ruler penetrates through the through hole. The microphone positioning device for acoustic detection can quickly position the position of the microphone unit, has the advantages of being reasonable in structural design, convenient to mount and dismount, accurate in positioning position, easy to operate, high in speed and high in efficiency, and greatly improves the speed and accuracy of testing the average sound pressure level.

Description

Technical Field

[0001] This application relates to the field of acoustic testing, and more particularly to a microphone positioning device for acoustic testing. Background Technology

[0002] Mean sound pressure level (MSL) is an indicator of sound intensity, primarily used to assess noise levels, sound intensity, and the impact of sound on the human body. It is measured using microphones. GB / T 19889.4-2005 specifies that MSL can be measured using at least five microphones evenly distributed within the room to be tested, and stipulates that the minimum distance between any two microphone positions is 0.7m. The distance between any microphone and the room boundary or diffuser should be no less than 0.5m, and the distance between any microphone position and the sound source should be no less than 1.0m.

[0003] Traditional measurements use a measuring tape to measure the distance between different microphone positions, rooms, and sound sources. This method is slow and prone to errors due to inaccurate distance measurements. Utility Model Content

[0004] This application provides a microphone positioning device for acoustic testing, which has the advantages of simple structure, fast measurement speed, improved efficiency, ensuring that the microphone position meets the standard requirements, and convenient operation for experimental personnel. It solves the problems of slow measurement speed and easy test errors caused by inaccurate distance in traditional measurement.

[0005] This application provides a microphone positioning device for acoustic detection, including a housing, a winding mechanism disposed in the secondary chamber, and a flexible scale for measuring distance;

[0006] The housing has a main chamber and multiple auxiliary chambers. The microphone is located in the main chamber. The multiple auxiliary chambers are arranged in a circle around the main chamber. The outer wall of the housing has through holes that communicate with the auxiliary chambers.

[0007] The winding mechanism has a moving end, one end of the flexible scale is connected to the moving end of the winding mechanism, and the other end of the flexible scale passes through the through hole.

[0008] In one feasible implementation, the positioning device also includes a fixing element;

[0009] The fixing member is fixedly connected to the other end of the flexible ruler, and the fixing member is engaged with the outer wall of the housing.

[0010] In one feasible implementation, the outer wall of the housing is provided with claws;

[0011] When two positioning devices are connected, the fixing element of one positioning device engages with the claw of the other positioning device.

[0012] In one feasible implementation, the fastener includes a plate, the outer wall of which is fixedly connected to the other end of the flexible scale.

[0013] The plate has multiple connection holes, and fixing nails pass through the connection holes to connect with the building.

[0014] In one feasible implementation, the winding mechanism includes a main shaft and a measuring tape spring;

[0015] The main shaft is fixed in the auxiliary chamber, the measuring tape spring is wound around the outer wall of the main shaft, and one end of the measuring tape spring is fixedly connected to the outer wall of the main shaft, while the other end of the measuring tape spring is fixedly connected to one end of the flexible scale.

[0016] In one possible implementation, the housing includes a matching upper housing and a lower housing;

[0017] The upper housing has a first groove and a plurality of second grooves on the side facing the lower housing, and the lower housing has a third groove and a plurality of fourth grooves on the side facing the upper housing, with the plurality of second grooves and the plurality of fourth grooves corresponding one-to-one;

[0018] After the upper shell and the lower shell are fastened and fixed, the first groove and the third groove constitute the main chamber, and the second groove and the corresponding fourth groove constitute the secondary chamber.

[0019] In one possible implementation, one end of the main shaft is fixedly connected to the inner wall of the second groove or the fourth groove.

[0020] The inner wall of the fourth groove or the second groove is provided with a limiting ring, and the other end of the main shaft is inserted into the limiting ring.

[0021] In one feasible implementation, the upper housing is provided with a plurality of first screw holes, and the lower housing is provided with a plurality of second screw holes, wherein the plurality of first screw holes and the plurality of second screw holes correspond one-to-one;

[0022] The screw is screwed into the corresponding first screw hole and second screw hole.

[0023] In one feasible implementation, a protective structure is provided within the main cavity;

[0024] The protective structure is a protective pad.

[0025] In one feasible implementation, the positioning device also includes a motion component;

[0026] The motion component is fixed to the lower surface of the lower housing;

[0027] The motion component is a swivel wheel.

[0028] This application provides a microphone positioning device for acoustic detection. A main chamber is provided inside the housing for installing a microphone. Multiple secondary chambers are also provided inside the housing. Each secondary chamber is provided with a winding mechanism. The winding mechanism has a moving end. One end of a flexible scale is connected to the moving end of the winding mechanism, and the other end of the flexible scale passes through a through hole.

[0029] In use, one positioning device is placed in the room being tested, and other positioning devices are placed around it. At the same time, the flexible scale of the positioning device located in the center is pulled out and connected to the other positioning devices. The distance between the positioning devices in the two rooms is determined by the scale markings on the flexible scale, ensuring that the positioning devices meet the minimum distance requirement, thereby ensuring the accuracy of the test.

[0030] The microphone positioning device for acoustic testing provided in this application can quickly locate the microphone unit. It has a reasonable structural design, is easy to install and disassemble, and features accurate positioning, ease of operation, and high speed and efficiency, which greatly improves the speed and accuracy of testing the average sound pressure level. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the acoustic detection microphone positioning device provided in this application;

[0032] Figure 2 This is a top view of the positioning device;

[0033] Figure 3 This is a top sectional view of the positioning device;

[0034] Figure 4 It is the upper housing of the positioning device;

[0035] Figure 5 This is a schematic diagram showing the connection status of two positioning devices;

[0036] Figure 6 This is a structural diagram of the fastener;

[0037] Figure 7 This is a schematic diagram showing the positioning device in use.

[0038] Explanation of reference numerals in the attached figures:

[0039] 10-Shell; 20-Rewinding mechanism; 30-Flexible scale; 40-Fixed component; 50-Motion component; 60-Protective structure;

[0040] 11-Main chamber; 12-Secondary chamber; 13-Through hole; 14-Claw; 15-Upper housing; 16-Lower housing; 21-Main shaft; 22-Measurement spring; 41-Plate; 42-Connecting hole. Detailed Implementation

[0041] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0042] Mean sound pressure level (SPL) is an important concept in acoustics. SPL is calculated by taking the logarithm of the ratio of the effective sound pressure level to the reference sound pressure level, base 10, and multiplying by 20. The unit is decibel (dB). Mean SPL is a value obtained by averaging multiple sound pressure levels over a certain spatial or temporal range, and is used to describe the overall intensity of sound within that range.

[0043] GB / T 19889.4-2005 specifies that the average sound pressure level can be measured using at least five microphones evenly distributed within the room to be tested, and stipulates that the minimum distance between two microphone positions should not be less than 0.7m. Traditionally, a measuring tape is used to measure the distance between different microphone positions and the room / sound source, which is slow and prone to experimental errors due to inaccurate distance measurements. The microphone positioning device for acoustic testing provided in this application can quickly locate the microphone unit position. It features a reasonable structural design, convenient installation and disassembly, accurate positioning, ease of operation, and high speed and efficiency, greatly improving the speed and accuracy of average sound pressure level testing.

[0044] The following detailed description, in conjunction with the accompanying drawings, illustrates the specific structure of the acoustic detection microphone positioning device provided in this application.

[0045] Reference Figures 1-7 As shown, this application provides a microphone positioning device for acoustic detection, including a housing 10, a winding mechanism 20 disposed in the secondary chamber 12, and a flexible scale 30 for measuring distance;

[0046] The housing 10 can be a cylinder, and its material is not limited. The housing 10 is provided with a main chamber 11 and multiple auxiliary chambers 12. The main chamber 11 can be a cylindrical chamber. The main chamber 11 is located at the center of the housing 10, and the microphone is located in the main chamber 11.

[0047] A microphone is an electroacoustic transducer that converts sound signals into electrical signals. Microphones can be moving-coil microphones, condenser microphones, electret microphones, or piezoelectric microphones.

[0048] The secondary chamber 12 can be a circular chamber, and multiple secondary chambers 12 are distributed in a circular pattern around the main chamber 11. The outer wall of the shell 10 is provided with a through hole 13 that communicates with the secondary chambers 12. The through hole 13 can be a circular hole or a square hole.

[0049] The winding mechanism 20 has a moving end, one end of the flexible scale 30 is connected to the moving end of the winding mechanism 20, and the other end of the flexible scale 30 passes through the through hole 13;

[0050] The winding mechanism 20 applies a pulling force to the flexible ruler 30 within the housing 10. The flexible ruler 30 can be a leather tape measure or a plastic tape measure. The distance between two adjacent positioning devices, as well as the distance between the positioning device and the wall of the room being measured, can be determined through the scale markings on the flexible ruler 30.

[0051] In use, one positioning device is placed in the room to be tested, and other positioning devices are set around it. At the same time, the flexible scale 30 of the positioning device located in the center is pulled out and connected to the other positioning devices. The distance between the positioning devices in the two rooms is determined by the scale markings of the flexible scale 30, ensuring that the positioning devices meet the minimum distance requirement, thereby ensuring the accuracy of the test.

[0052] Reference Figures 3-6 As shown, in some embodiments, the positioning device further includes a fixing member 40;

[0053] The fixing member 40 is fixedly connected to the other end of the flexible ruler 30, and the fixing member 40 is used to fix the outer end of the flexible ruler 30.

[0054] In its natural state, the winding mechanism 20 winds up the flexible ruler 30 and applies a force into the housing 10 to the flexible ruler 30. The surface area of ​​the fixing member 40 is larger than that of the through hole 13, so that the fixing member 40 is engaged with the outer wall of the housing 10. In use, pulling the fixing member 40 will drive the flexible ruler 30 to move.

[0055] Furthermore, in some embodiments, the outer wall of the housing 10 is provided with claws 14, which can be L-shaped claws or U-shaped claws, and multiple claws 14 are evenly distributed on the outer wall of the housing 10.

[0056] like Figure 5 When the two positioning devices are connected, the fixing member 40 of one positioning device engages with the claw 14 of the other positioning device.

[0057] Furthermore, since GB / T 19889.4-2005 stipulates that the average sound pressure level can be measured using at least five microphones evenly distributed within the room to be tested, therefore, if Figure 3 As shown, each positioning device has four sub-chambers 12, and one positioning device can be connected to four positioning devices at the same time, so that five positioning devices can measure one room being measured.

[0058] Furthermore, the outer wall of the positioning device is provided with four claws 14, and the four claws 14 and four through holes 13 are evenly and alternately distributed on the outer wall of the housing 10.

[0059] Reference Figure 6 As shown, in some embodiments, the fastener 40 includes a plate 41, which may be a rectangular plate, and the outer wall of the plate 41 is fixedly connected to the other end of the flexible ruler 30.

[0060] When the positioning devices are connected, the fixing part 40 of one positioning device engages with the claw 14 of the other positioning device.

[0061] The plate 41 is provided with a plurality of connecting holes 42, which may be round holes;

[0062] When the positioning device is connected to the wall of the room being measured, it is fixedly connected to the room wall or building by means of a fixing nail passing through the connection hole 42.

[0063] Reference Figure 3 As shown, in some embodiments, the winding mechanism 20 includes a main shaft 21 and a measuring tape spring 22;

[0064] The main shaft 21 is a vertically arranged shaft, which is fixed in the auxiliary chamber 12. The measuring tape spring 22 is a conventional steel spring, which is wound around the outer wall of the main shaft 21. One end of the measuring tape spring 22 is fixedly connected to the outer wall of the main shaft 21, and the other end of the measuring tape spring 22 is fixedly connected to one end of the flexible scale 30.

[0065] In its natural state, the measuring tape spring 22 is wound around the outer wall of the main shaft 21 from the inside out, and the flexible scale 30 is wound around the outer wall of the measuring tape spring 22 from the inside out. The measuring tape spring 22 applies a pulling force to the flexible scale 30 into the housing 10.

[0066] Reference Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments, the housing 10 includes a matching upper housing 15 and a lower housing 16, both of which are cylindrical structures;

[0067] The upper housing 15 has a first groove and a plurality of second grooves on the side facing the lower housing 16, and the lower housing 16 has a third groove and a plurality of fourth grooves on the side facing the upper housing 15, with the plurality of second grooves and the plurality of fourth grooves corresponding one-to-one.

[0068] After the upper housing 15 and the lower housing 16 are fastened and fixed, the first groove and the third groove constitute the main chamber 11, and the second groove and the corresponding fourth groove constitute the secondary chamber 12.

[0069] Furthermore, in some embodiments, one end of the main shaft 21 is fixedly connected to the inner wall of the second groove or the fourth groove;

[0070] The inner wall of the fourth groove or the second groove is provided with a limiting ring, and the other end of the main shaft 21 is inserted into the limiting ring;

[0071] like Figure 3 and Figure 4 As shown, the bottom end of the main shaft 21 is fixedly connected to the middle of the inner wall of the fourth groove, and a limiting ring is provided in the middle of the inner wall of the second groove. The upper end of the main shaft 21 is inserted into the limiting ring.

[0072] Furthermore, in some embodiments, the upper housing 15 is provided with a plurality of first screw holes, and the lower housing 16 is provided with a plurality of second screw holes, wherein the plurality of first screw holes correspond one-to-one with the plurality of second screw holes;

[0073] The screws are screwed into the corresponding first and second screw holes to fix the upper housing 15 and the lower housing 16 together.

[0074] Reference Figure 3 As shown, in some embodiments, a protective structure is provided inside the main chamber 11;

[0075] The protective structure can be a protective pad, which can be made of rubber, to protect the microphone and prevent it from being damaged by collision with the housing 10.

[0076] Reference Figure 1 As shown, in some embodiments, the positioning device further includes a motion component 50, which is fixed to the lower surface of the lower housing 16;

[0077] The motion component 50 can be a caster wheel, which facilitates the movement of this positioning device.

[0078] Based on the above technical features, the working principle of the acoustic detection microphone positioning device provided in this application in practical application scenarios is as follows:

[0079] like Figure 7 As shown, Figure 7In the middle, A represents the inner outline of the room;

[0080] Before measuring room A, the microphone is placed in the main chamber 11 of the positioning device. The first positioning device is placed in the middle area of ​​the room, and four more positioning devices are placed around the first positioning device. The five positioning devices are arranged in a cross shape. The four fixing parts 40 of the middle positioning device are respectively engaged with the claws 14 of the four outer positioning devices, and the degree of the four flexible scales 30 is greater than 0.7m.

[0081] Connect any one of the four fixing parts 40 of the outer positioning device to the ground or wall, and determine the distance between the four outer positioning devices and the inner outline of room A by measuring the degree of the flexible ruler 30 or by calculation, ensuring that the distance is not less than 0.5m;

[0082] When measuring room A, the average sound pressure level can be calculated by taking the readings from the five microphones.

[0083] The acoustic testing microphone positioning device provided in this application includes a main chamber 11 inside a housing 10 for mounting a microphone; a plurality of secondary chambers 12 are also provided inside the housing 10, each of which is provided with a winding mechanism 20. The winding mechanism 20 has a moving end, one end of a flexible scale 30 is connected to the moving end of the winding mechanism 20, and the other end of the flexible scale 30 passes through a through hole 13.

[0084] The microphone positioning device for acoustic testing provided in this application can quickly locate the microphone unit. It has a reasonable structural design, is easy to install and disassemble, and features accurate positioning, ease of operation, and high speed and efficiency, which greatly improves the speed and accuracy of testing the average sound pressure level.

[0085] It is readily understood that, based on the several embodiments provided in this application, those skilled in the art can combine, split, or reorganize the embodiments of this application to obtain other embodiments, none of which exceed the protection scope of this application.

[0086] The above detailed embodiments further illustrate the purpose, technical solution, and beneficial effects of the embodiments of this application. It should be understood that the above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solutions of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A microphone positioning device for acoustic detection, characterized in that: include; The housing (10) has a main chamber (11) and a plurality of auxiliary chambers (12) inside. The microphone is disposed in the main chamber (11). The plurality of auxiliary chambers (12) are arranged in a circle around the main chamber (11). The outer wall of the housing (10) has through holes (13) that communicate with the auxiliary chambers (12). A winding mechanism (20) is disposed in the sub-chamber (12), the winding mechanism (20) having a moving end; A flexible ruler (30) for measuring distance, one end of which is connected to the moving end of the winding mechanism (20), and the other end of which passes through the through hole (13).

2. The acoustic detection microphone positioning device according to claim 1, characterized in that: It also includes fasteners (40); The fixing member (40) is fixedly connected to the other end of the flexible ruler (30), and the fixing member (40) is engaged with the outer wall of the housing (10).

3. The acoustic microphone positioning device according to claim 2, characterized in that: The outer wall of the housing (10) is provided with claws (14); When two positioning devices are connected, the fixing member (40) of one positioning device engages with the claw (14) of the other positioning device.

4. The acoustic detection microphone positioning device according to claim 2, characterized in that: The fastener (40) includes a plate (41), the outer wall of which is fixedly connected to the other end of the flexible ruler (30); The plate (41) is provided with multiple connecting holes (42), and the fixing nails pass through the connecting holes (42) to connect with the building.

5. The acoustic detection microphone positioning device according to claim 1, characterized in that: The winding mechanism (20) includes a main shaft (21) and a measuring tape spring (22); The main shaft (21) is fixed in the secondary chamber (12), the measuring tape spring (22) is wound around the outer wall of the main shaft (21), and one end of the measuring tape spring (22) is fixedly connected to the outer wall of the main shaft (21), and the other end of the measuring tape spring (22) is fixedly connected to one end of the flexible ruler (30).

6. The acoustic detection microphone positioning device according to claim 5, characterized in that: The housing (10) includes a matching upper housing (15) and a lower housing (16); The upper housing (15) has a first groove and a plurality of second grooves on the side facing the lower housing (16), and the lower housing (16) has a third groove and a plurality of fourth grooves on the side facing the upper housing (15), with the plurality of second grooves and the plurality of fourth grooves corresponding one to one; When the upper shell (15) and the lower shell (16) are fastened and fixed, the first groove and the third groove constitute the main chamber (11), and the second groove and the corresponding fourth groove constitute the secondary chamber (12).

7. The acoustic microphone positioning device according to claim 6, characterized in that: One end of the main shaft (21) is fixedly connected to the inner wall of the second groove or the fourth groove; The inner wall of the fourth groove or the second groove is provided with a limiting ring, and the other end of the main shaft (21) is inserted into the limiting ring.

8. The acoustic detection microphone positioning device according to claim 6, characterized in that: The upper housing (15) is provided with a plurality of first screw holes, and the lower housing (16) is provided with a plurality of second screw holes, wherein the plurality of first screw holes and the plurality of second screw holes correspond one-to-one; The screw is screwed into the corresponding first screw hole and second screw hole.

9. The acoustic microphone positioning device according to claim 6, characterized in that: The main chamber (11) is equipped with a protective structure (60); The protective structure (60) is a protective pad.

10. The acoustic detection microphone positioning device according to claim 6, characterized in that: It also includes motion components (50); The motion component (50) is fixed to the lower surface of the lower housing (16); The motion component (50) is a swivel wheel.

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