CN112129836B - Sound insulation measuring method for building functional wall surface - Google Patents
Sound insulation measuring method for building functional wall surface Download PDFInfo
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- CN112129836B CN112129836B CN202011055965.2A CN202011055965A CN112129836B CN 112129836 B CN112129836 B CN 112129836B CN 202011055965 A CN202011055965 A CN 202011055965A CN 112129836 B CN112129836 B CN 112129836B
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- 238000009413 insulation Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000012360 testing method Methods 0.000 claims abstract description 69
- 238000010586 diagram Methods 0.000 claims abstract description 44
- 238000005259 measurement Methods 0.000 claims description 54
- 230000000694 effects Effects 0.000 description 6
- 229920000742 Cotton Polymers 0.000 description 4
- 238000005192 partition Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/01—Indexing codes associated with the measuring variable
- G01N2291/015—Attenuation, scattering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/103—Number of transducers one emitter, two or more receivers
Abstract
The invention relates to a sound insulation measuring method for a functional wall surface of a building, which comprises the steps of establishing a test surface which is parallel to the functional wall surface and has a distance H of 1-10cm, and establishing a point network consisting of measuring points on the test surface; measuring the sound pressure value of each measuring point to obtain a sound pressure distribution map; by combining the structure distribution diagram and the sound pressure distribution diagram, the poor sound insulation point on the functional wall surface can be found out.
Description
Technical Field
The invention belongs to the field of sound insulation measurement, and particularly relates to a sound insulation measurement method for a functional wall surface of a building.
Background
Currently, people have increasingly high demands on quality of life. However, the technology is continuously developed, the noise sources are more and more, and the requirements on the sound insulation quality of the building are also increased.
According to the civil building sound insulation design specification (GB 50118-2010), the measuring points are uniformly distributed and represented. The arrangement of the measuring points should meet the following specifications: 1) The height of the measuring point from the ground is 1.2 m-1.6 m; 2) The distance between the measuring point and each reflecting surface in the room is more than or equal to 1.0m; 3) The distance between each measuring point is more than or equal to 1.5m; 4) The distance between the measuring point and the noise source in the room is more than or equal to 1.5m. In a more crowded room, when the above-mentioned measuring point conditions cannot be satisfied, the distance between the measuring point and each reflecting surface (excluding important sound transmission units such as windows) in the room should be 0.7m or more, and the distance between the measuring points should be 0.7m or more.
However, the above measurement method can only characterize the overall sound insulation effect of the functional wall surface, and cannot give constructive references to subsequent tests. For example, through the measuring method, the sound insulation index of a certain window, a certain door or a certain household wall can be tested to be unqualified, but the method can not instruct us to change details so as to solve the sound insulation defect.
Disclosure of Invention
The invention aims to overcome the technical problems in the background technology, provides a sound insulation measuring method for a functional wall surface of a building, and aims to solve the problem that the existing sound insulation measuring method cannot distinguish where the specific sound insulation performance of the functional wall surface is bad.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a sound insulation measuring method for a building functional wall surface comprises the following steps:
obtaining a structural distribution diagram of the functional wall surface;
establishing a test surface parallel to the functional wall surface, wherein the distance H between the test surface and the functional wall surface is selected within a range of 1-10 cm;
establishing a point network consisting of measurement points on the test surface;
measuring the sound pressure value of each measuring point to obtain a sound pressure distribution map;
and finding out bad sound insulation points on the functional wall surface by combining the structure distribution diagram and the sound pressure distribution diagram.
Further, the step of establishing a point network comprising measurement points on the test surface includes:
acquiring the distance H between the test surface and the functional wall surface;
dividing the test surface into a measurement unit grid consisting of a plurality of measurement units, wherein the measurement units are square, regular triangle or regular hexagon, and the relationship between the side length D of the measurement unit and the distance H satisfies the following relationship: d=kh, the coefficient k being chosen in the range 1-2;
and the vertex of the measuring unit is a measuring point, and all measuring points on the test surface form a point network.
Further, the step of establishing a point network comprising measurement points on the test surface includes:
acquiring a distance H between the test surface and the functional wall surface;
judging whether the structure distribution diagram has a symmetrical structure or not, wherein the symmetrical axis of the symmetrical structure is a first symmetrical axis;
if yes, dividing the test surface into a symmetrical area and an asymmetrical area by combining the symmetrical structure on the structure distribution diagram, wherein the symmetrical area comprises a first side, a second side and a second symmetrical axis;
dividing the asymmetric region into a measurement unit grid composed of a plurality of measurement units, wherein the measurement units are square, regular triangle or regular hexagon, and the relationship between the side length D of the measurement unit and the distance H satisfies the following relationship: d=kh, k is a coefficient, k is selected in the range of 1-2, and the vertex of the measuring unit is a measuring point;
setting a plurality of measuring points taking a second symmetry axis as a symmetry axis on the symmetry area;
and establishing a point network consisting of the measuring points through all the measuring points on the test surface.
Further, the step of setting a plurality of measurement points with the second symmetry axis as the symmetry axis on the symmetry area includes:
finding hidden trouble points on the first side and the second side by referring to a structure distribution diagram;
the hidden danger points on the first side and the second side are mirrored by a second symmetry axis to obtain hidden danger points;
and the integral of the hidden danger point and the symmetry hidden danger point forms a measuring point taking the second symmetry axis as a symmetry axis.
Further, the step of establishing a test surface parallel to the functional wall surface, wherein the distance H between the test surface and the functional wall surface is included before the step of selecting within a range of 1-10 cm;
establishing a test guiding surface parallel to the functional wall surface, wherein the distance H between the test guiding surface and the functional wall surface 1 Selecting within 20-50 cm;
establishing a primary measurement point network consisting of primary measurement points on the test guide surface;
measuring the sound pressure value of each initial measuring point to obtain a preliminary sound pressure distribution map;
and combining the structure distribution diagram and the preliminary sound pressure distribution diagram to find out a region with poor sound insulation on the functional wall surface.
Further, the step of obtaining the structural distribution map of the functional wall surface includes:
and carrying out sound insulation treatment on the through holes, blind holes or through pipelines which damage the functional wall surface.
Further, the step of measuring the sound pressure value at each measurement point and obtaining the sound pressure distribution map includes:
the back side of the functional wall surface is provided with a sound source, wherein one side of the functional wall surface with the testing surface is a front side, and one side of the functional wall surface opposite to the front side is a back side.
The invention provides a sound insulation measuring method for a functional wall surface of a building, which is characterized in that a test surface which is parallel to the functional wall surface and has a distance H of 1-10cm is established, and a point network consisting of measuring points is established on the test surface; measuring the sound pressure value of each measuring point to obtain a sound pressure distribution map; by combining the structure distribution diagram and the sound pressure distribution diagram, the poor sound insulation point on the functional wall surface can be found out.
Drawings
FIG. 1 is a flowchart illustrating steps performed in accordance with one embodiment of the present invention;
FIG. 2 is a flow chart of steps of a second embodiment of the present invention;
FIG. 3 is a flow chart of steps of a third embodiment of the present invention;
FIG. 4 is a schematic view of a point network according to a third embodiment of the present invention;
FIG. 5 is a schematic diagram of a third embodiment of the present invention combining the structure profile and the sound pressure profile;
FIG. 6 is a flowchart illustrating steps of a fourth embodiment of the present invention;
FIG. 7 is a schematic view of a point network according to a fourth embodiment of the present invention;
FIG. 8 is a schematic diagram of a fourth embodiment of the present invention combining the structure profile and the sound pressure profile;
FIG. 9 is a flowchart illustrating steps of a fifth embodiment of the present invention;
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, in an embodiment of the present invention, a method for measuring sound insulation of a functional wall surface of a building includes:
s1, obtaining a structural distribution diagram of the functional wall surface;
s2, establishing a test surface parallel to the functional wall surface, wherein the distance H between the test surface and the functional wall surface is selected within a range of 1-10 cm;
s3, establishing a point network consisting of measurement points on the test surface;
s4, measuring the sound pressure value of each measuring point to obtain a sound pressure distribution diagram;
s5, combining the structure distribution diagram and the sound pressure distribution diagram, and finding out a sound insulation bad point on the functional wall surface.
In the step S1, the functional wall surface is a glass curtain wall, an inner partition wall, an outer structure wall or a top surface and the like. The structural distribution diagram of the functional wall surface is the position and size distribution of each structure (such as a window, a partition wall, a door leaf or a fire box and the like) on the functional wall surface.
In step S2, the test surface is a virtual surface, and the measurement point is set on the test surface. The resolution is higher as the distance H between the measuring point and the functional wall surface is smaller, and the sound pressure distinction of each measuring point cannot be distinguished if the distance H exceeds 10 cm.
In the step S3-S4, a point network consisting of measuring points is established on the test surface in a system, so that the sound insulation effect of each position on the functional wall surface can be analyzed through the data of each measuring point on the point network. If the functional wall surface is provided with a sound insulation bad point, the sound pressure value is measured at the corresponding position on the test surface, however, if the sound pressure distribution diagram is not available, whether the sound pressure value at the corresponding position on the test surface is abnormally higher or not can not be obtained through comparative analysis.
In this embodiment, an Edwardsier is used to measure the sound pressure value at the measurement point.
Referring to fig. 2, in one embodiment, the step of creating a point network of measurement points on the test surface includes:
s300, acquiring the distance H between the test surface and the functional wall surface;
s301, dividing the test surface into a measurement unit grid composed of a plurality of measurement units, wherein the measurement units are square, regular triangle or regular hexagon, and the relationship between the side length D of the measurement unit and the distance H satisfies the following relationship: d=kh, the coefficient k being chosen in the range 1-2;
s302, the vertexes of the measuring units are measuring points, and all measuring points on the test surface form a point network.
In step S300-S302, the test surface is considered to be composed of square units, regular triangle units or regular hexagon units of the dense arrangement portion, and the vertexes of the units are selected as measurement points, so that the measurement points are uniformly arranged on the test surface, and sound pressure values at various positions on the whole test surface are conveniently counted for subsequent analysis.
The side length D of the measuring unit is the distance between the measuring points, and when the measuring points are closer to the wall surface, the distance between the measuring points can be correspondingly shortened. If the distance H between the measuring points and the functional wall surface is large, it is not meaningful to shorten the distance between the measuring points due to insufficient resolution. The resolution is higher as the distance H between the measuring point and the functional wall surface is smaller, and if the distance H exceeds 10cm, the resolution is lower, so that the sound pressure distinction of each test point cannot be distinguished; i.e. a measuring point is too large in the corresponding area of the functional wall.
Referring to fig. 3-5, in one embodiment, the step of creating a network of measurement points on the test surface includes:
s310, acquiring the distance H between the test surface and the functional wall surface;
s311, judging whether the structure distribution diagram has a symmetrical structure or not, wherein the symmetrical axis of the symmetrical structure is a first symmetrical axis;
s312, if so, dividing the test surface into a symmetrical area and an asymmetrical area by combining the symmetrical structure on the structure distribution diagram, wherein the symmetrical area comprises a first side, a second side and a second symmetrical axis;
s313, dividing the asymmetric area into a measuring unit grid composed of a plurality of measuring units, wherein the measuring units are square, regular triangle or regular hexagon, and the relationship between the side length D of the measuring unit and the distance H satisfies the following relationship: d=kh, k is a coefficient, k is selected in the range of 1-2, and the vertex of the measuring unit is a measuring point;
s314, setting a plurality of measuring points taking a second symmetry axis as a symmetry axis on the symmetry area;
s315, establishing a point network composed of measurement points through all the measurement points on the test surface.
In step S311, the structure distribution diagram has a symmetrical structure such as a door leaf or a window, so that the corresponding area on the test surface can be divided into symmetrical areas, and the symmetry axis of the symmetrical structure is the first symmetry axis.
In the steps S314-S315, the symmetrical structure on the structure distribution diagram is correspondingly adapted to the measuring points which take the second symmetry axis as the symmetry axis, and the symmetrical arrangement of the measuring points gives strong guidance for searching the sound insulation bad points on the functional wall surface. If the sound pressure test results of two symmetrical measuring points in the symmetrical structure have larger difference, judging that the sound insulation effect of one measuring point is poor.
In this embodiment, referring to table 1 and fig. 4-5, the symmetric region is a window, and fig. 4 is a schematic view of a point network; FIG. 5 is a schematic diagram of a combination of the structural profile and the acoustic pressure profile; table 1 is the sound pressure value (decibel) at each of the measurement points over the symmetric region.
TABLE 1
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | |
| L | 52.5 | 51.3 | 50.2 | 49.6 | 51.6 | 51.7 | 48.5 | 52.7 | 57.6 | 64.8 | 59.3 | 62.4 | 57.5 |
| R | 51.3 | 50.5 | 50.4 | 50.6 | 49.6 | 52.7 | 47.5 | 53.0 | 50.5 | 51.9 | 50.6 | 50.6 | 49.9 |
Through comparison, the sound pressure data of L9, L11 and L13 are about 7 decibels greater than the sound pressure data of R9, R11 and R13, and finally, the sound insulation bad points on the functional wall surface are found out to be poor in fixing of the sound insulation strips between the window and the window frame by combining the structural distribution map and the sound pressure distribution map.
The sound pressure data of L10 and L12 are found to be about 13 decibels greater than the sound pressure data of R10 and R112 through comparison, and sound insulation bad points on the functional wall surface are found to be hardware lock points which are not hung on the lock seat by combining the structural distribution diagram and the sound pressure distribution diagram.
In this embodiment, the distances between the L1, L2 and L4 measurement points, the distances between the L3 and L5 measurement points, and the distances between the L9, L11 and L13 measurement points are all small, so that the sound insulation bad points can be analyzed in detail, but the measurement operation time is increased.
Referring to fig. 6-8 and table 2, in one embodiment, the step of disposing a plurality of measurement points on the symmetry region with the second symmetry axis as the symmetry axis includes:
s3140, referring to a structural distribution diagram, and finding hidden danger points on the first side and the second side;
s3141, mirroring hidden danger points on the first side and the second side by a second symmetry axis to obtain hidden danger points;
s3142, the hidden danger point and the symmetry hidden danger point are integrated to form a measurement point taking the second symmetry axis as a symmetry axis.
In step S3140-S3142, the hidden trouble points are lock points, screw points, seal strip joints, glue joints or splice joint points, which may have poor sound insulation. If the structural distribution diagram has a symmetrical structure such as a door leaf or a window, the detail part of the structural distribution diagram can still be asymmetrical, and in fact, the asymmetrical structure can be a great sound insulation hidden danger point. For example, a symmetrical rectangular gap is formed between a door leaf and a frame, but a lock point is formed on one side of the door. The measuring points are provided at both the lock point (hidden trouble point) and the position on the door leaf symmetrical to the lock point (hidden trouble point) except for the plurality of measuring points symmetrically provided at the rectangular gap. By comparing the sound pressure test results of the hidden danger points with the sound pressure test results of the symmetrical hidden danger points, a valuable reference can be given to a user for finding out the sound insulation bad points on the functional wall surface.
In this embodiment, the symmetric region is a door leaf, and fig. 7 is a schematic diagram of a point network; FIG. 8 is a schematic diagram of a combination of the structural profile and the acoustic pressure profile; table 2 is the sound pressure value (decibel) at each of the measurement points over the symmetric region.
TABLE 2
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | |
| L | 48.6 | 45.6 | 47.4 | 46.7 | 48.1 | 49.0 | 49.4 |
| R | 47.6 | 44.6 | 52.8 | 55.7 | 47.8 | 49.7 | 48.5 |
The sound pressure data of R03 and R04 are found to be more than 5 decibels greater than the sound pressure data of L03 and L04 through comparison, and the sound insulation bad points on the functional wall surface are found to be door locks by combining the structural distribution diagram and the sound pressure distribution diagram, and gaps between door leaves and door frames at the door locks are too large and sound insulation treatment is not carried out. R03 and R04 are hidden danger points at the door lock, and L03 and L04 are hidden danger points of symmetry of R03 and R04. And finding out the sound insulation bad point at the door lock through comparing the sound pressure test results of the hidden danger point and the symmetrical hidden danger point.
In the embodiment, L02 and L05 are door leaf hinges, namely hidden danger points; r02 and R05 are symmetrical hidden danger points of L02 and L05, and sound pressure data at the symmetrical hidden danger points are significant for analysis of sound insulation effects.
Referring to fig. 9, in one embodiment, the step of establishing a test surface parallel to the functional wall surface, wherein a distance H between the test surface and the functional wall surface is included before the step of selecting within a range of 1-10 cm;
SP1, establishing a test guide surface parallel to the functional wall surface, wherein the distance H between the test guide surface and the functional wall surface 1 Selecting within 20-50 cm;
SP2, establishing a primary measurement point network consisting of primary measurement points on the test guide surface;
SP3, measuring the sound pressure value of each initial measuring point to obtain a preliminary sound pressure distribution map;
and SP4, combining the structure distribution diagram and the preliminary sound pressure distribution diagram, and finding out a sound insulation poor region on the functional wall surface.
In the steps SP1-SP4, the area with poor sound insulation is found in advance, so that the range of the points with poor sound insulation is conveniently narrowed, and the efficiency is improved. If the sound insulation bad area is found, a point network composed of measuring points is only established on the range of the test surface corresponding to the bad area.
In one embodiment, the step of obtaining the structural distribution map of the functional wall surface includes:
and carrying out sound insulation treatment on the through holes, blind holes or through pipelines which damage the functional wall surface.
In the above steps, the sound insulation treatment of the through holes and the blind holes on the functional wall surface comprises filling or plugging, and the sound insulation treatment of the through pipeline comprises wrapping the through pipeline by using sound insulation cotton. The filling or blocking of the through holes and the blind holes can be realized through the cooperation of the soundproof cotton and the cement. The through holes are reserved with threading holes, pipeline holes, top gaps and the like; the types of the upper blind holes comprise a switch box or a fire box hole and the like. The wrapping length of the soundproof cotton on the penetrating pipe depends on the wall thickness of the penetrating pipe, and the thinner the wall thickness of the penetrating pipe is, the longer the wrapping length of the soundproof cotton is required.
If the opening degree of the space of the functional wall surface influences the sound insulation measurement, zero-time partition is needed (for example, temporary wooden doors are used for closing the space). If the space internal reverberation of the functional wall surface is too high, the reverberation parameter can be reduced by means of paving felts and the like (for example, the reverberation parameter of a blank room is generally large, and the measurement of sound insulation can be influenced).
The above means are all to improve the analyzability of the sound pressure data obtained by the subsequent measurement, if the above steps are not performed, the difference of the sound pressure values of the measurement points is covered, and the sound insulation bad points on the functional wall surface cannot be analyzed. In fact, the difference in sound pressure value at the point of poor sound insulation is generally only a few db, and is easily masked.
In one embodiment, the step of measuring the sound pressure value at each of the measurement points, and obtaining the sound pressure distribution map includes:
the back side of the functional wall surface is provided with a sound source, wherein one side of the functional wall surface with the testing surface is a front side, and one side of the functional wall surface opposite to the front side is a back side.
The functional wall surface comprises a front side and a back side, and the front side is the side of the functional wall surface with the testing surface. The sound source is necessary for testing the sound insulation effect in a laboratory, however, at present, only a tester is taken to the site for the sound insulation measurement on the site, the sound insulation effect of the test function wall on natural noise is obviously inaccurate, and the natural noise fluctuation is large so as to cover up the tiny sound pressure measurement difference. The sound source is best arranged in the center of the functional wall surface, and the sound source can be fixed on the functional wall surface by common means such as bonding, hooking and magnetic attraction.
The terms first, second and the like in the description and in the claims, are not used for any order, quantity or importance, but are used for distinguishing between different elements. Likewise, the terms "a," "an," or "the" and similar terms do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
The embodiment is only a single implementation of the present invention, and it is within the scope of the present invention for a person skilled in the art to obtain other embodiments according to the drawings without inventive effort.
Claims (5)
1. The method for measuring the sound insulation of the functional wall surface of the building is characterized by comprising the following steps of:
obtaining a structural distribution diagram of the functional wall surface;
establishing a test surface parallel to the functional wall surface, wherein the distance H between the test surface and the functional wall surface is selected within a range of 1-10 cm;
establishing a point network consisting of measurement points on the test surface;
measuring the sound pressure value of each measuring point to obtain a sound pressure distribution map;
finding out bad sound insulation points on the functional wall surface by combining the structure distribution diagram and the sound pressure distribution diagram;
the step of establishing a point network comprising measurement points on the test surface comprises the following steps:
acquiring a distance H between the test surface and the functional wall surface;
judging whether the structure distribution diagram has a symmetrical structure or not, wherein the symmetrical axis of the symmetrical structure is a first symmetrical axis;
if yes, dividing the test surface into a symmetrical area and an asymmetrical area by combining the symmetrical structure on the structure distribution diagram, wherein the symmetrical area comprises a first side, a second side and a second symmetrical axis;
dividing the asymmetric region into a measurement unit grid composed of a plurality of measurement units, wherein the measurement units are square, regular triangle or regular hexagon, and the relationship between the side length D of the measurement unit and the distance H satisfies the following relationship: d=kh, k is a coefficient, k is selected in the range of 1-2, and the vertex of the measuring unit is a measuring point;
setting a plurality of measuring points taking a second symmetry axis as a symmetry axis on the symmetry area;
and a plurality of measuring points taking the second symmetry axis as the symmetry axis are arranged on the symmetry area.
2. The method for measuring sound insulation of a functional wall surface of a building according to claim 1, wherein the step of disposing a plurality of measuring points on the symmetrical region with the second symmetry axis as the symmetry axis comprises:
finding hidden trouble points on the first side and the second side by referring to a structure distribution diagram;
the hidden danger points on the first side and the second side are mirrored by a second symmetry axis to obtain hidden danger points;
and the integral of the hidden danger point and the symmetry hidden danger point forms a measuring point taking the second symmetry axis as a symmetry axis.
3. The method for measuring sound insulation of a functional wall surface of a building according to claim 1, wherein the step of establishing a test surface parallel to the functional wall surface, wherein a distance H between the test surface and the functional wall surface is within a range of 1-10cm, comprises the steps of;
establishing a test guiding surface parallel to the functional wall surface, wherein the distance H between the test guiding surface and the functional wall surface 1 Selecting within 20-50 cm;
establishing a primary measurement point network consisting of primary measurement points on the test guide surface;
measuring the sound pressure value of each initial measuring point to obtain a preliminary sound pressure distribution map;
and combining the structure distribution diagram and the preliminary sound pressure distribution diagram to find out a region with poor sound insulation on the functional wall surface.
4. A method for measuring sound insulation of a functional wall surface of a building according to any one of claims 1 to 3, wherein the step of obtaining a structural distribution map of the functional wall surface comprises:
and carrying out sound insulation treatment on the through holes, blind holes or through pipelines which damage the functional wall surface.
5. A method for measuring sound insulation of a functional wall surface of a building according to any one of claims 1 to 3, wherein the step of measuring the sound pressure value at each of the measurement points and obtaining the sound pressure distribution map is preceded by the steps of:
the back side of the functional wall surface is provided with a sound source, wherein one side of the functional wall surface with the testing surface is a front side, and one side of the functional wall surface opposite to the front side is a back side.
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