JP2002243533A - Method for evaluating sound insulation performance between adjacent chamber and selected side wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for evaluating sound insulation performance between adjacent chambers and a selected side wall capable of calculating and evaluating quantitatively the sound insulation performance of the side wall by calculating a side wall solid propagation sound between the adjacent chambers as a vibration acceleration level propagating inside the side wall. SOLUTION: When evaluating the sound insulation performance between adjacent chambers enclosed by the side wall 4 intersected with a door boundary wall 3, the sound pressure level of a propagated side wall solid propagation sound (a symbol of a trancated chevron shape) is calculated as a sound pressure level determined from the sound pressure of a sound source chamber 1 after entering the side wall 4 on the sound source chamber side, being propagated inside the side wall 4 with internal damping, and being radiated from the side wall 4 on the sound receiving chamber 2 side, and synthesized quantitatively with a direct transmission sound through the door boundary wall, to thereby calculate the sound pressure level in the sound receiving chamber. Hereby, the sound insulation performance between the adjacent chambers is calculated and evaluated quantitatively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for evaluating sound insulation performance between adjacent rooms and a selected side wall. The present invention relates to a method for evaluating sound insulation performance between adjacent rooms that can quantitatively evaluate and evaluate the sound insulation performance of a side wall and a selected side wall.

[0002]

2. Description of the Related Art The layout of an apartment house or the like is arbitrarily determined by a designer, and the length of a side wall connected to a door between adjacent houses is also exclusively used to satisfy restrictions on fire prevention. I have to. On the other hand, when designing sound insulation between dwellings, studies have generally been made focusing on the sound insulation performance of the door barrier and side walls, but we also expected to use a door barrier with high sound insulation performance There are many problems that the performance cannot be secured.

[0003] These problems arise as a sound propagation path between adjacent rooms separated by door walls and surrounded by side walls intersecting the door walls. This is because the influence of sideway propagation sound such as propagation cannot be ignored, especially in the current situation where the length of the side wall connected to the border wall is determined as described above, the sideway propagation sound in the sound insulation design. Consideration must be given to

[0004] In the conventional prediction of the sound insulation performance, the adjacent room for which the sound insulation performance is to be evaluated is, as shown in FIG.
And the sound-receiving room 2, which is partitioned by a door wall 3, and a side wall 4 spanning both rooms is arranged so as to intersect with the door wall 3. It is assumed to be enclosed.

In the prediction flow of the sound insulation performance, the sound pressure level is set in the sound source room 1 between the adjacent rooms, and the sound pressure level propagating from the sound source room 1 to the sound receiving room 2 is shown in FIG. As shown, the sound is transmitted for each route of the direct transmitted sound (a) from the doorway wall 3, the detour propagation sound (b) from the opening 5 such as a window or a door, and the side wall solid sound (c). The sound pressure level of the sound receiving room was calculated by assuming and combining the sound pressure levels calculated individually for each route.

[0006] Since the sound insulation performance is a difference in sound pressure level between adjacent rooms, the sound insulation performance between adjacent rooms to be evaluated is calculated with the sound pressure level in the sound source room 1 for each route. Thus, the sound pressure level determined to be transmitted to the sound receiving room 2 is determined based on a difference from the synthesized sound pressure level in the sound receiving room 2 in which the sound pressure levels are synthesized.

For this reason, it is necessary to calculate the sound pressure level propagating for each route, but the direct transmission sound (a) from the door wall 3 and the detour propagation from the opening 5 such as a window or a door. Although the sound (b) has been relatively studied, the sound transmission through the side wall has not been sufficiently investigated.

[0008] The conventional side wall solid-borne sound (c) is an actually measured value obtained by measuring the vibration acceleration level at an arbitrary point on the side wall of the sound receiving room or the sound pressure level generated from the side wall on the sound receiving room side. In addition to taking measures based on the above, as a countermeasure, only the base material 7 of the interior wall 6 is changed,
The pursuit and countermeasures for other parts were not considered.

[0009] Also, with respect to the solid-state sound on the side wall calculated based on the actually measured vibration acceleration level, the sound pressure level radiated from the side wall surface on the sound receiving room side is proportional to the total surface area on the side wall on the sound receiving room side. The effect was overestimated as a result, and it was a factor that made it difficult to respond to the actual situation.

As described above, the conventional calculation of the sound insulation performance between the adjacent rooms surrounded by the side walls intersecting the door border wall of the partition has been predicted by an inconsistent calculation flow involving actual measurement work. Even if a material with good sound insulation performance is applied to door walls and side walls, initial performance cannot often be established. There is a demand for a simple calculation flow that can calculate the transmitted sound pressure level only by adopting quantitative values based on structures and structures. There has been a demand for the development of a means for easily selecting a side wall that can determine the sound insulation performance between adjacent rooms by comparing the evaluated sound insulation performance with a set allowable value.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it has been proposed that solid-state sound propagating in a side wall of a sound source chamber is incident on the side wall of the sound source chamber when the sound pressure of the sound source chamber is incident on the side wall. By calculating the sound pressure level on the sound receiving room side as radiating from the side wall on the sound receiving room side while propagating, the sound insulation performance between adjacent rooms surrounded by the side wall that intersects the door wall of the partition quantitatively It provides a method for evaluating the sound insulation performance between adjacent rooms and selected side walls, which enables calculation and evaluation.

[0012]

According to the first aspect of the present invention, there is provided a method for evaluating sound insulation performance between adjacent rooms, comprising the steps of: separating an adjacent room separated by a door boundary wall and surrounded by a side wall intersecting the door boundary wall; Calculates the sound pressure level of the sound source room and the sound pressure level at which the sound pressure of the sound source room is transmitted to the sound receiving room as a direct transmitted sound from the door, a bypass sound from windows and doors, and a solid-state sound from the side wall. In the sound insulation performance evaluation method between adjacent rooms determined by the difference from the sound pressure level of the sound receiving room to be synthesized above, the sound pressure level of the transmitted side wall solid-borne sound is determined by setting the sound pressure of the sound source room to the sound source room side. The sound pressure level radiated from the side wall on the sound receiving room side is calculated by being incident on the side wall of the door and propagating while attenuating inside the side wall. Propagation from the sound source room to the sound receiving room for each route of detour propagation sound and side wall solid sound The by calculating the sound pressure level of the sound receiving chamber by synthesizing on the quantitative calculation can be quantitatively determinable evaluate the sound insulation performance between adjacent chambers.

According to a second aspect of the present invention, in the method for evaluating the sound insulation performance between adjacent rooms, the sound pressure level of the side wall solid sound propagated in the method for evaluating the sound insulation performance between the adjacent rooms according to the first aspect of the present invention. By converting the sound pressure incident from the side wall surface of the sound source room into a vibration acceleration level, the arrival vibration acceleration level reaching the intersection with the door boundary wall is calculated while attenuating internally at each incident point, Combining the reached vibration acceleration levels from all the side wall surfaces to calculate the total reached vibration acceleration level, subtracting the energy loss due to the intersection characteristics from the total reached vibration acceleration level, and calculating the transmitted vibration acceleration level transmitted through the intersection,
Based on the transmitted vibration acceleration level, calculate the vibration acceleration level that reaches the radiation point on the side wall surface of the sound receiving room while attenuating inside the side wall on the sound receiving room side from the intersection with the door boundary wall, and radiate the vibration acceleration level It is characterized by converting to sound pressure for each point and combining and calculating as the sound pressure level radiated from all side walls of the sound receiving room side, in addition to the above function, the sound insulation performance between adjacent rooms It can be calculated in a specific form.

According to a third aspect of the present invention, in the method for evaluating sound insulation performance between adjacent rooms, the total reached vibration acceleration level is calculated by the following equation. It is characterized in that, in addition to the above functions, the total reached vibration acceleration level at the intersection with the door boundary wall can be quantitatively calculated.

VAL _S = Σ (VAL _SO −α × √f × L _i ) (dB) where VAL _S : Total arrival vibration acceleration level VAL _SO : Vibration acceleration level at the incident point α: Vibration propagating in the side wall internal damping coefficient f: frequency L _i: the distance from the incident point to the boundary surface located on an extension of the sound source chamber side Tosakai wall

According to a fourth aspect of the present invention, in the method for evaluating the sound insulation performance between adjacent rooms, the vibration acceleration level at the radiation point is expressed by the following equation. In addition to the above function, the vibration acceleration level at the radiation point can be quantitatively calculated from the transmitted vibration acceleration level at the intersection with the door boundary wall.

VAL _rS = Σ (VAL _r0 −α × √f × D _i ) (dB) where VAL _rS : Vibration acceleration level at the radiation point VAL _rO : At the sound-receiving room side door wall surface that has passed through the intersection Transmission vibration acceleration level α: Internal damping coefficient of vibration propagating in the side wall f: Frequency D _i : Distance from the radiation point to the boundary surface located on the extension of the door wall on the sound receiving room side

According to a fifth aspect of the present invention, there is provided the method for evaluating sound insulation performance between adjacent rooms according to any one of the second to fourth aspects. The vibration acceleration level at the sound pressure incident point is calculated by taking into account the sound pressure level of the sound source room and the incident efficiency of the interior wall laid on the interior surface of the side wall, and in addition to the above functions, the interior The effect of the wall is concretely improved to improve the quantitativeness of the sound insulation performance between adjacent rooms.

According to a sixth aspect of the present invention, there is provided a method for evaluating sound insulation performance between adjacent rooms according to any one of the second to fifth aspects. The vibration acceleration level transmitted to the side wall is calculated by adding the vibration transmission efficiency to the interior wall laid on the indoor surface of the side wall to the vibration acceleration level at the radiation point of the side wall. Thus, the effect of the interior wall is specifically made to improve the quantitativeness of the sound insulation performance between adjacent rooms.

According to a seventh aspect of the present invention, there is provided the method for evaluating sound insulation performance between adjacent rooms according to the sixth aspect of the present invention, wherein the sound radiated from the interior wall surface on the sound receiving room side is provided. The pressure level is calculated by taking into account the radiation efficiency of the interior wall in addition to the vibration acceleration level transmitted to the interior wall. Of the sound insulation performance of the car has been improved.

The selected side wall according to the present invention comprises:
The sound insulation performance between adjacent rooms is compared with the sound pressure level on the sound source room side and the calculated sound pressure level on the sound reception room side by using the sound insulation performance evaluation method between adjacent rooms described in any one of (1) to (7). The sound insulation performance is determined to achieve the allowable value, and as necessary to achieve the allowable value, penetrate the side wall at the intersection with the door boundary wall in the thickness direction of the door wall. The slits are formed along the direction of the intersection to change the characteristics of the intersection, the side walls are formed of a void-shaped extrusion mold to change the characteristics of the intersection and the damping of the vibration transmitted to the side walls, It is characterized by recalculating by changing the efficiency, vibration transmission efficiency and radiation efficiency, and achieves sound insulation performance in an optimal state.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The method for evaluating sound insulation performance between adjacent rooms according to the present invention is based on the sound pressure level of a sound source room between adjacent rooms separated by a door wall and surrounded by a side wall intersecting the door wall. The sound pressure of the sound source room is calculated by calculating the sound pressure level transmitted to the sound receiving room as the sound directly transmitted through the door wall, the bypass sound from windows and doors, and the solid-state sound from the side walls. In the sound insulation performance evaluation method between adjacent rooms determined by the difference with the sound pressure level, the sound pressure level of the transmitted side wall solid sound,
The sound pressure in the sound source room is incident on the side wall on the sound source room side, propagates while attenuating inside the side wall, and is calculated as a sound pressure level radiated from the side wall on the sound receiving room side.

Hereinafter, the flow of calculating the sound insulation performance between adjacent rooms will be described in detail with reference to the drawings according to the embodiment of the present invention. Used.

FIG. 1 is a plan view of an adjacent room to which the present invention is applied. The configuration between adjacent rooms for evaluating the sound insulation performance is set to a sound source room 1 and a sound receiving room 2.

The sound source room 1 and the sound receiving room 2 are separated by a door wall 3, and a side wall 4 is provided across the two rooms so as to cross the door wall 3. Is provided with an opening 5 such as a window, a door, etc., and is provided with an interior wall 6 made of a normal base material 7 on the inner surface thereof. Is enclosed.

An arbitrary sound pressure level is set in the sound source room 1 and a considerable sound pressure is transmitted from the sound source room 1 to the sound receiving room 2 through each member. Since the configuration between them is the same as the conventional one, the direct transmitted sound (a) from the doorway wall 3 and the detour propagation sound (b) from the opening 5 are:
It is calculated according to the same calculation flow as before.

The characteristics of the sound insulation performance evaluation method according to the present invention are as follows.
Between adjacent rooms that form an intersection with the door border wall as described above and are surrounded by side walls that straddle both rooms, for solid-borne sound that has not been sufficiently investigated in the conventional sound insulation performance evaluation,
By theoretically elucidating this, it is possible to quantitatively calculate the transmitted sound pressure level while eliminating the need for actual measurement work as in the past, and thereby to easily determine the sound insulation performance between adjacent rooms.

FIGS. 2 and 3 show a method of evaluating the sound insulation performance between adjacent rooms according to the present invention and a flow of selecting a sound insulating structure for surely selecting a side wall using the method. , The sound transmitted directly from the door boundary wall 3 (a) and the opening 5
For the detour propagation sound (b) from, the same calculation method as that of the related art is adopted, and the explanation of the relationship is minimized. Hereinafter, an embodiment of the present invention will be described with reference to the flowchart shown in FIG.

10. Sound pressure level in the sound source room (SPL
s) Setting The sound pressure level (SPLs) set in the sound source room 1 is 125 Hz to 2 KH, which is the target frequency of the sound insulation performance in the building.
Set for each z band (1/1 octave band).

Since the sound insulation performance is the difference between the sound pressure levels in the sound source room 1 and the sound receiving room 2, the sound pressure level to be set may be an arbitrary numerical value, but is set to 100 dB in the present embodiment.

[11] Incident efficiency level of interior wall (In)
The sound generated in the sound source room 1 causes the interior wall 6 to be subjected to sound pressure vibration and propagates to the side wall 4. At this time, the sound pressure level → the degree of vibration propagation to the side wall is defined as the incident efficiency level (In). Define and display the value as a dB value.

Since this value differs depending on the member constituting the side wall, it is a value measured in advance in a laboratory or on site, and in this embodiment, it is converted into a database based on “incident efficiency DB”. By storing it, the incident efficiency level (In) corresponding to the set interior wall 6 can be selectively used.

Table 1 is an example of data stored in "incidence efficiency DB".

[0034]

[Table 1]

In the above table, (t = * 1), (t = *
2) illustrates that the wall thickness t is * 1, * 2, and the ALC version + GL and the like similarly indicate the side wall where a GL bond or the like is laid on the interior surface of the ALC version, and the like. .

12. Calculation of Vibration Acceleration Level (VALso) at Incident Point Since the interior wall 6 is supported by the base materials 7 arranged at regular intervals as shown in a partially enlarged view in FIG. (In) is set for each type of base material as shown in Table 1.

The vibration generated on the side wall depends on the surface of the interior wall 6 →
Since the propagation position of the base material 7 to the side wall 4 is traced, the calculated position of the vibration acceleration level at the incident point is the connection position between the side wall 4 and the base material 7, but the base material is GL shown in FIG.
If provided over the front surface of the side wall rather than spaced apart like a bond, the point of incidence will be infinite.

Therefore, the vibration acceleration level (VALso) at the incidence point is calculated for each frequency by the following equation. VALso = SPLs + In

13. Total arrival vibration acceleration level (VAL
_S ) Calculation The side wall 4 on the sound source room 1 side intersects the door border wall 3 to form an intersection 8 as shown in a partially enlarged view in FIG.
Since the individual propagation paths are formed on the side wall 4 via the base material 7 arranged at the incident point of the light beam, the vibration generated on the side wall follows these propagation paths and intersects at the intersection 8.
Is transmitted to the boundary surface 9 located on an extension of the wall surface on the sound source room side on the sound source room side.

The value of the reached vibration acceleration level at the boundary surface 9 is calculated from the calculated value of the vibration acceleration level (VALso) at the incident point in consideration of the internal damping coefficient (α) for the vibration of the side wall 4. The value of the total reached vibration acceleration level (VAL _S ) at the boundary surface 9 is obtained by the following equation that combines vibrations that propagate from the input position of each vibration generated individually on the side wall 4.

VAL _S = Σ (VALso−α√f · L _i ) where VAL _S : Total arrival vibration acceleration level VAL _SO : Vibration acceleration level at the incident point α: Internal damping coefficient of vibration propagating in the side wall f: frequency L _i: the distance from the incident point to the boundary surface located on an extension of the sound source chamber side Tosakai wall

In the above formula, the vibration acceleration level at the point of incidence is the same because a diffused sound field is formed in the closed chamber and the sound pressure level incident on the side wall surface is substantially constant. Examples of the internal damping coefficient (α) are ALC version: 0.25, concrete version: 0.0
3, voided extruded plate: a numerical value of 0.15 is known.

14. Setting of Intersection Attenuation (Δk) As shown in a partially enlarged view in FIG. 6, the side wall 4 intersects the door border wall 3 to form an intersection 8, and the intersection 8 has a sound source room side. A boundary surface 9 and a boundary surface 9 'on the sound receiving chamber side are formed.

Between the boundary surface 9 on the sound source room side and the boundary surface 9 'on the sound receiving room side, an energy loss due to the intersection characteristics occurs, so that it is necessary to set the intersection attenuation (Δk).

Although the amount of attenuation (Δk) at the intersection differs depending on the members constituting the side wall, it can be obtained in advance by measurement in a laboratory or on site, and is made into a database as “cross attenuation DB”. The attenuation amount of the selected side wall 4 can be selected. Table 2 shows an example of the contents of the database.

[0046]

[Table 2]

In the above table, (t = * 1) to (t = *
4) illustrates that the wall thickness t is * 1 to * 4. In the case of the ALC plate slit (D = * 2), the side wall of the ALC plate side wall is formed at the intersection with the door boundary wall. Indicates that a slit having a width of * 2 penetrating in the thickness direction is provided.

15. Transmission vibration acceleration level (VA
Calculation of L _ro ) From the value of the total attained vibration acceleration level (VAL _S ), the transmitted vibration acceleration level (VAL _ro ) at the boundary surface 9 ′ on the sound receiving room side is obtained by the following equation. VAL _ro = VAL _S -Δk

16. Calculation of Vibration Acceleration Level (VAL _r ) at Radiation Point As shown in FIG. 7 in a partially enlarged manner, in this embodiment, the interior wall 6 is disposed on the side wall 4 on the sound receiving room 2 side at a constant interval. Because it is supported by the timber 7, the intersection 8 with the door border wall 3
, An individual propagation path is formed at a point where the base material 7 is disposed.

Therefore, the boundary surface 9 ′ of the intersection 8 on the sound receiving room side.
The vibrations from are propagated along the respective propagation paths to the position (1) which becomes the radiation point on the side wall 4.

From this, the value of the vibration acceleration level (VAL _r ) at the radiation point is determined based on the internal damping coefficient (α) for the vibration of the side wall 4 based on the transmission vibration acceleration level (VAL _ro ) at the boundary surface 9 ′. It is calculated by the following equation.

[0052] _{VAL r = VAL ro -α√f · D} i However, VAL _r : Vibration acceleration level at the radiation point VAL _rO : Vibration acceleration level at the doorway wall on the sound receiving room side passing through the intersection α: Internal damping coefficient of vibration propagating in the side wall f: Frequency D _i : Receiving from the radiation point Distance to the boundary located on the extension of the doorway wall on the sound room side

As described above, according to the sound insulation performance evaluation method of the present invention, the vibration acceleration level (VAL
Since the value of r) is calculated by a method of synthesizing a value that is internally attenuated corresponding to the distance from the boundary surface 9 ′, a value that is actually in accordance is provided.

This means that the average vibration acceleration level (VAL) within the radiation area of the sound pressure from the sound receiving chamber side wall and the radiation area level ( ₁₀ log ₁₀ S) (where S is the side wall area of the sound receiving chamber) The total vibration acceleration level (VAL) of the interior wall is calculated from the above, and the vibration acceleration level of the radiation area that does not actually contribute is also calculated to have an effect on the composite level. The calculation method was a factor that greatly deviated in the calculation accuracy.

As described above, the internal damping coefficient (α) of the vibration propagating in the side wall in each of the above equations is A
LC plate: 0.25, concrete plate: 0.03, void-shaped extruded plate: 0.15.

17. Setting of Vibration Transmission Level (ΔT) As in the present embodiment, the propagation path is formed by the base materials 7 arranged at regular intervals, and the vibration of the side wall 4 is changed from the side wall 4 → the base material 7 → the interior wall. When a propagation path such as the surface of the interior wall 6 is traced, the vibration transmission level (ΔT) corresponding to the base material 7 is considered in order to calculate the vibration acceleration level on the surface of the interior wall 6.

The value of the vibration transmission level (ΔT) is a value measured in advance in the laboratory or on the site for the side wall composed of different members.
B. , And a database is stored and stored, so that the vibration transmission level (ΔT) corresponding to the set base material 7 can be selectively used. Table 3 shows “Vibration transmission D.
B. Is an example of data stored in "."

[0058]

[Table 3]

In the above table, (t = * 1), (t = *
2) illustrates that the wall thickness t is * 1, * 2, and the ALC version + GL and the like similarly indicate the side wall where a GL bond or the like is laid on the interior surface of the ALC version, and the like. .

18. Vibration acceleration level reaching interior wall
Calculation of (VAL _r1 ) The calculation of the vibration acceleration level (VAL _r1 ) reaching the interior wall 6 is obtained from the value of the vibration acceleration level (VAL _r ) at the radiation point by the following equation. VAL _r1
= VAL _r + ΔT

19. Vibration acceleration level on interior wall
Calculation of (VAL _rS ) As shown in FIG. 8 in a partially enlarged manner, in the present embodiment, the interior wall 6 is supported by the base material 7 arranged at regular intervals on the side wall 4 on the sound receiving room 2 side. Therefore, the vibration from the boundary surface 9 ′ of the intersection 8 on the sound receiving room side is caused by the arrangement of the base material 7.
Following the propagation paths formed at the point of, the light is propagated to the position 〜 which becomes the radiation point of the side wall 4.

For this purpose, different values are calculated for the vibration acceleration level (VAL _rS ) on the side wall surface as shown in the figure due to the internal damping corresponding to the distance from the boundary surface 9 '.

Therefore, the vibration acceleration level on the interior wall
The value of (VAL _rS ) is obtained by the following equation in which vibrations individually propagating from the radiating point of the side wall 4 are synthesized on the interior wall. VAL _rS = ΣVAL _r1

As described above, according to the sound insulation performance evaluation method of the present invention, the vibration acceleration level (VAL
_Since the value of ( _rS ) is calculated by combining the internally attenuated value corresponding to the distance from the boundary surface 9 ', a value which is in accordance with the actual value is provided.

20. Setting of radiation efficiency level (R) of interior wall

The vibration acceleration level (VA) generated on the interior wall
L _rS ) is defined as the radiation efficiency level (R) when the conversion efficiency is converted to sound pressure, and the value is expressed as a dB value.

Since this value differs depending on the member constituting the side wall, it is a value measured in advance in a laboratory or on site, and in this embodiment, it is stored in a database as “radiation efficiency DB”. Radiation efficiency level (R) corresponding to the set combination of interior wall 6 and side wall 4
Is selected. Table 4 is an example of data stored in “radiation efficiency DB”.

[0068]

[Table 4]

In the above table, (t = * 1), (t = *
2) illustrates that the wall thickness t is * 1, * 2, and the ALC version + GL and the like similarly indicate the side wall where a GL bond or the like is laid on the interior surface of the ALC version, and the like. .

21. Calculation of equivalent sound absorption area level (Ar) The sound absorption area is determined from the surface area of the sound receiving chamber and the average sound absorption coefficient,
Calculate the equivalent sound absorbing area level (Ar). Ar = ₁₀ log ₁₀ (A) where A: sound absorption area

22. Calculation of Side Wall Solid Propagation Sound (SPL _r1 ) The vibration generated on the interior wall is as follows: sidewall 4 → foundation material 7 → interior wall 6
Therefore, the sound pressure level (SPL _r1 ) at the interior wall is calculated for each frequency by the following formula in consideration of the radiation efficiency level (R) of the interior wall. SPL _r1 = VAL _rS + R-20 log ₁₀ f-A _r +36

According to the above calculations, the sound pressure that the vibration generated by the sound pressure on the sound source room side propagates to the sound receiving room side via the side wall is measured in advance in the laboratory or on the site, and By applying the converted value to the side wall or interior wall for which the sound insulation performance is to be evaluated and using it, it is possible to determine it as a numerical value according to the actual situation.

Further, the following necessary for adding the direct transmitted sound from the door wall (a) and the detour propagation sound (b) from the opening 5 such as a window or a door, which are performed in the same manner as in the conventional example. Since the calculation can be developed in the same manner as the conventional sound insulation structure selection flow, only the items are described.

23. Calculation of directly transmitted sound (SPL _r2 ) of doorway wall

24. Detour propagation sound from windows and doors (S
Calculation of PL _r3 )

25. Total sound pressure level in the receiving room (SP
Calculation of L _r ) The total sound pressure level (SPL _r ) of the sound receiving room is calculated by the above-described side wall solid-borne sound (SPL _r1 ), the directly transmitted sound (SPL _r2 ) calculated by a known formula, and By using the detour propagation sound (SPL _r3 ) from a window or a door, it is calculated by the following equation.

[0077]

26. Calculation D _r = SPL _S -SPL _r of sound insulation between the adjacent chambers (D _r)

27. Verification with allowable value The allowable value of the sound insulation performance is usually given by the D value. For example, in the case of D-50, the level in each frequency band is as shown in the following numerical values. If the calculated value of the sound insulation performance (D _r ) is not less than these values, the sound insulation performance is satisfied.

[0080]

28. Calculation of Required Measures (D _t ) The calculated sound insulation performance (D _r ) is from 125 Hz to 2 Hz.
If the value in KHz exceeds the value shown in Table 5, the work of evaluating the sound insulation performance is completed. However, if the value is lower than this in any band, the necessary countermeasure amount is calculated. D _t = D−Dr

The result of the evaluation of the sound insulation performance shown in FIG. 9 is an example in which the method for evaluating the sound insulation performance between adjacent rooms according to the present invention is applied to a temporarily selected sound insulation structure.

In this embodiment, as a result of the above-described calculation, the sound source SPL _S , the vibration acceleration level of the sound source side wall, the arrival at the intersection boundary, the transmission vibration acceleration level, and the side wall solid sound through the interior wall, etc. As shown in the figure, the sound insulation performance according to the present invention is calculated at the relevant work site as in the past. Without the need for complicated work such as actual measurement values, quantitative sound insulation performance is finally determined by quantitatively calculated values for each item.

In FIG. 9, the permissible value required for the sound insulation performance is set for each frequency band, and the sound insulation performance calculated for the temporarily selected sound insulation structure is recorded in item 26. As shown in item 27, a measure of 2.5 dB is required in a 500 Hz band.

The measures to be taken against the calculated required countermeasures will be examined individually for the direct transmitted sound of the door, the detour propagation sound from windows and doors, and the side wall solid sound. The direct transmission sound of the door boundary wall and the detour propagation sound from the windows and doors and the like are determined by examining the same countermeasures as in the related art, and the description thereof will be omitted.

As a study 30 of measures against the side wall solid noise, five study measures shown in the flow of FIG. 3 are scheduled, and whether or not each measure can be dealt with will be examined. Hereinafter, embodiments and examples of each study countermeasure will be described.

31. Examination of specification change of interior base , Radiation efficiency DB. ,
Vibration transmission DB Calculate the effective amount of countermeasures accompanying the specification change from among the above and select the one that satisfies the conditions by checking against the required countermeasure amount.

In this embodiment, the original specification of the side wall is the ALC version +
Since the GL method was used, the incident efficiency DB , Radiation efficiency D.
B. , Vibration transmission DB. From ALC version + Kisoji and ALC
As a result of obtaining the change when changing to the plate + LGS base and examining whether it is possible to respond to the required countermeasures,
By using the C version and the wood substrate, the allowable value of the sound insulation performance can be satisfied in all the bands.

32. Measures for intersections Crossover attenuation DB. The amount of countermeasures when a slit is provided at the intersection of the side wall and the doorway wall, the change in the amount of effect due to changes in the specifications of materials and structures, and other measures that affect vibration propagation And select one that satisfies the conditions.

In this embodiment, since the original specification at the intersection between the side wall and the door boundary wall is the ALC version, the cross attenuation DB. Then, the change when changing to another specification was obtained. The result of the study can be handled by inserting a slit at the intersection.

33. Investigation of cross-section attenuation due to side wall member change For the purpose of study, the cross-attenuation when the side wall member is changed is referred to as cross-attenuation DB. Calculate the effective amount of countermeasures after retrieving from, and check against the required amount of countermeasures and select the one that satisfies the conditions.

34. In order to study the change of the combination of the interior base specification and the measures for intersections, the incidence efficiency D.
B. , Radiation efficiency DB. , Vibration transmission DB. Calculate the countermeasure effect amount accompanying the specification change from among the
B. From the intersection of the side wall and the border with the door, calculate the amount of countermeasure effect, etc., calculate the amount of countermeasure effect when both are combined, check against the required countermeasure amount and satisfy the conditions Choose one.

35. Investigation by changing the specifications of the interior base and changing the material of the side wall , Radiation efficiency DB. , Vibration transmission DB. , The amount of countermeasure effect accompanying the change of the interior basement specification is calculated, and the cross attenuation when the side wall member is changed is calculated as the cross attenuation DB. The effective amount of countermeasures is calculated by retrieving from the list, and the effective amount of countermeasures when both are combined is calculated.

As described above, when the calculated sound insulation performance does not satisfy the allowable value in the entire frequency band, while changing the members of the interior base, the intersection of the side wall and the door boundary wall and the side wall, If necessary, the effective amount of countermeasures is calculated based on these combinations, and the required amount of countermeasures is checked to determine whether the conditions are satisfied.

In the process of selecting the evaluation, if the conditions are satisfied even if the base material is changed or a slit is formed at the intersection, the optimum specification will be selected from these countermeasures. Whether to adopt as the optimal countermeasures will be determined from the aspect of design and construction.

However, if there is no countermeasure even if the calculation is performed again while applying the entire database, it is necessary to return to the original and reconsider the side wall area and the like including the design.

As described above, according to the method for evaluating the sound insulation performance between adjacent rooms according to the present invention, the sound pressure level of the sound source room is controlled between the partitioned door border wall and the adjacent room surrounded by the side wall intersecting with the wall. When calculating the sound pressure level that is transmitted to the sound receiving room as the sound pressure in the sound source room as the direct transmission sound of the doorway wall, the detour propagation sound from windows and doors, and the side wall transmission sound, By calculating the sound pressure level of the sound as the sound pressure level emitted from the side wall on the sound receiving room side, the sound pressure in the sound source room is incident on the side wall on the sound source room side, propagates while attenuating inside the side wall, and propagates inside the side wall. The sound insulation level between adjacent rooms is calculated simply by adopting quantitative values based on the material and structure of the door and side walls, eliminating the need for additional work such as actual measurement. Can be quantitatively evaluated.

In the above-described method of evaluating the sound insulation performance between adjacent rooms, the calculation of the sound pressure level transmitted to the sound receiving room requires
The slabs above and below the adjacent room are evaluated according to the conventional practice of not considering them because they have little effect on the sound pressure level.

If necessary, the slab is also regarded as a side wall, so that the sound pressure level transmitted to the sound receiving chamber is calculated in the same manner as in the case of the side wall, and the solid-state sound transmitted from the side wall is compared with the slab and the side wall. It is also possible to calculate it as including. In this case, the sound insulation performance can be more accurately evaluated because the small sound pressure level from the slab is also taken into account in detail.

The selected side wall according to the present invention is calculated using the above-described sound insulation performance evaluation method for the designed sound insulation structure, as described in the above-described embodiment and its examples. By comparing the sound pressure level on the sound receiving room side with the sound pressure level on the sound source room side, the sound insulation performance is calculated, and the side wall is selected so that this sound insulation performance value achieves the allowable value. .

If the designed sound insulation structure does not achieve the permissible value, the characteristics of the intersection of the side walls may be changed or the incidence efficiency of the interior wall may be reduced to achieve the permissible value. The sound insulation performance value was changed by recalculating while converting the vibration transmission efficiency and radiation efficiency, and the optimum condition was selected.

Hereinafter, embodiments of the selected side wall according to the present invention will be described in detail with reference to the drawings.

FIG. 10 shows an embodiment for changing the intersection characteristic of the side wall. As shown in the figure, a side wall 102 intersecting with a door boundary wall 101 has a slit 1 at the intersection.
03 is formed. The slit 103 is formed by forming a side wall with a gap in advance at the intersection or by cutting the side wall with a circular saw or the like. The shape is appropriately selected depending on the required countermeasures for the sound insulation performance, the material of the side wall, and the like.

In the present embodiment, a slit is formed to penetrate the side wall surface. However, it is not always necessary to penetrate the slit. If predetermined characteristics can be obtained, a groove is formed in the side wall. Is also applicable.

Similarly, depending on the size of the slit width, whether a filler such as glass wool is to be filled between the slits to seal the surface or form a void without the filler is also varied as a numerical example in the database. Can be

By forming the slit 103, a large numerical value change can be expected in each frequency band as in the example of the ALC plate shown in Table 2, for example. This is a possible solution.

In the figure, reference numeral 104 denotes an interior wall.
105 is the base material.

FIG. 11 shows another embodiment for changing the characteristics of the intersection and the internal damping coefficient of the vibration propagating in the side wall by changing the side wall. In the present embodiment,
The adoption of the void-shaped extrusion plate 106 as the side wall changes the characteristics of the side wall in the propagation of vibration.

The void-shaped extruded plate 106 has a void 107 formed therein. By the formation of the void 107, for example, as shown in the example of the extruded plate shown in Table 2, in the frequency band of 125 Hz, the void 107 is formed with the concrete plate. Shows an intermediate value from the ALC version.
By exhibiting a numerical value larger than that of the LC version, it is possible to effectively deal with the required amount of sound insulation performance.

Although the present invention has been described in detail based on the embodiments, the method for evaluating the sound insulation performance between adjacent rooms and the selected side wall according to the present invention are not limited to the above embodiments. And no cross attenuation DB. In addition to diversifying the study measures that greatly contribute to the change in the amount of countermeasures, such as diversification of structural changes such as providing sidewalls and slits at intersections of sidewalls, etc. Naturally, various changes can be made without departing from the spirit of the invention.

[0111]

According to the method for evaluating sound insulation performance between adjacent rooms according to the first aspect, the sound pressure of the sound source room is divided between the adjacent rooms separated by a door wall and surrounded by a side wall intersecting the door wall. A sound receiving room where the sound pressure level of the sound source room is calculated based on the sound pressure level transmitted to the sound receiving room as the sound directly transmitted through the door wall, the bypass sound from the windows and doors, and the solid-state sound transmitted from the side walls. In the sound insulation performance evaluation method between adjacent rooms determined by the difference between the sound pressure level of the sound pressure level of the
Since the sound pressure of the sound source room is incident on the side wall of the sound source room, propagates while attenuating inside the side wall, and is calculated as the sound pressure level radiated from the side wall of the sound receiving room, The sound pressure level of the sound receiving room is calculated by combining and calculating the sound that propagates from the room to the sound receiving room quantitatively, and the sound insulation performance between adjacent rooms is quantitatively measured without the need for actual measurement work on site. It has an effect that can be calculated and evaluated.

According to a second aspect of the present invention, there is provided a method for evaluating sound insulation performance between adjacent rooms, wherein the sound pressure level of the solid-wall-side sound propagated in the side wall is different from that of the first embodiment. By converting the sound pressure incident from the side wall surface of the sound source room into a vibration acceleration level, the arrival vibration acceleration level reaching the intersection with the door boundary wall is calculated while attenuating internally at each incident point, Combining the reached vibration acceleration levels from all the side wall surfaces to calculate the total reached vibration acceleration level, subtracting the energy loss due to the intersection characteristics from the total reached vibration acceleration level, and calculating the transmitted vibration acceleration level transmitted through the intersection,
Based on the transmitted vibration acceleration level, calculate the vibration acceleration level that reaches the radiation point on the side wall surface of the sound receiving room while attenuating inside the side wall on the sound receiving room side from the intersection with the door boundary wall, and radiate the vibration acceleration level It is characterized in that it is converted into sound pressure for each point and synthesized and calculated as the sound pressure level radiated from all side walls on the sound receiving room side.
This has the effect that the sound insulation performance between adjacent rooms can be calculated in a specific form.

According to a third aspect of the present invention, in the method for evaluating sound insulation performance between adjacent rooms, the total reached vibration acceleration level is calculated by the following equation. Because of this feature, in addition to the above effects, there is an effect that the total reached vibration acceleration level at the intersection with the door border wall can be quantitatively calculated.

VAL _S = Σ (VAL _SO −α × √f × L _i ) (dB) where VAL _S : Total attained vibration acceleration level VAL _SO : Vibration acceleration level at the incidence point α: Vibration propagating in the side wall internal damping coefficient f: frequency L _i: the distance from the incident point to the boundary surface located on an extension of the sound source chamber side Tosakai wall

According to a fourth aspect of the present invention, in the method for evaluating sound insulation performance between adjacent rooms according to the second or third aspect, the vibration acceleration level at the radiation point is expressed by the following equation. Therefore, in addition to the above effects, there is an effect that the vibration acceleration level at the radiation point can be quantitatively calculated from the transmitted vibration acceleration level at the intersection with the door border.

[0116] _{VAL rS = Σ (VAL r0 -α} × √f × D i) (dB) where, VAL _rS: vibration acceleration levels VAL _{and rO} emission point: through the intersection was on the receiving room side Tosakai wall Transmission vibration acceleration level α: Internal damping coefficient of vibration propagating in the side wall f: Frequency D _i : Distance from the radiation point to the boundary surface located on the extension of the door wall on the sound receiving room side

According to a fifth aspect of the present invention, there is provided a method for evaluating sound insulation performance between adjacent rooms according to any one of the second to fourth aspects. Since the vibration acceleration level at the sound pressure incident point is calculated by taking into account the incident efficiency of the interior wall laid on the interior surface of the side wall to the sound pressure level of the sound source room,
In addition to the effects described above, the effect of improving the quantitativeness of the sound insulation performance between adjacent rooms by specifically specifying the influence of the interior wall is provided.

The sound insulation performance evaluation method between adjacent rooms according to the invention of claim 6 is the method for evaluating sound insulation performance between adjacent rooms according to any one of claims 2 to 5, wherein the interior wall surface on the sound reception room side is provided. The vibration acceleration level transmitted to the side wall is calculated by adding the vibration transmission efficiency to the interior wall laid on the indoor surface of the side wall to the vibration acceleration level at the radiation point of the side wall. In addition, the effect of improving the quantitativeness of the sound insulation performance between adjacent rooms by specifically specifying the influence of the interior wall is exhibited.

According to a seventh aspect of the present invention, in the method for evaluating the sound insulation performance between adjacent rooms, the sound radiated from the interior wall surface on the sound receiving room side is provided. The pressure level is calculated by adding the radiation efficiency of the interior wall to the vibration acceleration level transmitted to the interior wall. This has the effect of improving the degree of quantification of the sound insulation performance.

The selected side wall according to the present invention comprises:
The sound insulation performance between adjacent rooms is compared with the sound pressure level on the sound source room side and the calculated sound pressure level on the sound reception room side by using the sound insulation performance evaluation method between adjacent rooms described in any one of (1) to (7). The sound insulation performance is determined to achieve the allowable value, and as necessary to achieve the allowable value, penetrate the side wall at the intersection with the door boundary wall in the thickness direction of the door wall. The slits are formed along the direction of the intersection to change the characteristics of the intersection, the side walls are formed of a void-shaped extrusion mold to change the characteristics of the intersection and the damping of the vibration transmitted to the side walls, It is characterized by recalculating by changing the efficiency, vibration transmission efficiency and radiation efficiency, and has the effect of achieving sound insulation performance in an optimal state.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of an adjacent room to which the method for evaluating sound insulation performance between adjacent rooms according to the present invention is applied.

FIG. 2 is a calculation flowchart for evaluating the sound insulation performance between adjacent rooms according to the present invention.

FIG. 3 is a study flow chart for making the sound insulation performance between adjacent rooms calculated according to the present invention correspond to an allowable value.

FIG. 4 is a diagram of a sound pressure propagation pattern on an interior wall and a side wall on the sound source room side.

FIG. 5 is a diagram showing the propagation form of vibration on the side wall of the sound source room.

FIG. 6 Intersection with a door border wall formed on the side wall

FIG. 7 is a diagram of a vibration propagation form on a side wall and an interior wall on the sound receiving room side.

FIG. 8 is a diagram of propagation attenuation of vibration on the interior wall on the sound receiving room side.

FIG. 9 is a calculation result in the embodiment of the method for evaluating the sound insulation performance between adjacent rooms according to the present invention.

FIG. 10 is an embodiment diagram for changing the intersection characteristics of the side wall;

FIG. 11 is a view showing another embodiment for changing the intersection characteristic of the side wall.

FIG. 12 is a schematic plan view of an adjacent room to which a conventional method for evaluating the sound insulation performance between adjacent rooms is applied.

FIG. 13 is a conventional calculation flow chart for evaluating the sound insulation performance between adjacent rooms.

[Explanation of symbols]

1 sound source room, 2 sound receiving room, 3 door boundary wall, 45 opening of windows, doors, etc. 6 interior wall, 7 base material, 8 intersection, 9 intersection of sound source room side boundary,
9 'Boundary surface on the sound receiving room side of the intersection, 10-27 Settings and calculation items for evaluating sound insulation performance, 28 Calculation of necessary countermeasures,
30 Examination of necessary measures, 31-35 Examination measures, 10
1 door border wall, 102 side wall, 103 slit,
104 interior wall, 105 interior base material, 106 void extrusion plate, 107 void, (a) direct transmitted sound of door boundary wall, (b) detour propagation sound from windows, doors, etc., (c) side wall Solid-borne sound,

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Katsuhiko Takaku, Inventor Kashima Construction Co., Ltd. 1-2-7 Moto-Akasaka, Minato-ku, Tokyo (72) Inventor Masanori Tano 1-2-7 Moto-Akasaka, Minato-ku, Tokyo No. Kashima Construction Co., Ltd. No. 2 No. 2 Okumura Gumi Co., Ltd. (72) Inventor Yukihiko Tobimatsu 2-2-2 Matsuzakicho, Abeno-ku, Osaka-shi, Osaka F term (reference) 2E001 DF02 DF06 FA03 2G064 AA05 AB02 AB04 AB15 AB16 AB18 BA02 CC29 CC41

Claims (11)

[Claims] The sound pressure level of the sound source room and the sound pressure of the sound source room are directly transmitted through the door boundary wall between adjacent rooms separated by a door boundary wall and surrounded by a side wall intersecting the door boundary wall. Calculate the sound pressure level transmitted to the sound receiving room as sound, detour propagation sound from windows and doors and side wall solid sound, and determine the difference between the sound pressure level and the sound pressure level of the sound receiving room. In the method for evaluating sound insulation performance, the sound pressure level of the sound propagating through the side wall is transmitted to the side wall on the sound receiving room side while the sound pressure of the sound source room is incident on the side wall on the sound source room side and is attenuated inside the side wall. A method for evaluating sound insulation performance between adjacent rooms, which is calculated as a sound pressure level radiated from a room. 2. The sound pressure level of the propagated solid-state sound transmitted from the side wall is converted from the sound pressure incident from the side wall surface on the sound source room side to the vibration acceleration level, and is attenuated internally at each incident point. The arrival vibration acceleration level reaching the intersection is calculated, the arrival vibration acceleration levels from all the side walls on the sound source room side are combined to calculate the total arrival vibration acceleration level, and the total arrival vibration acceleration level is calculated from the total arrival vibration acceleration level. The energy loss is reduced to calculate the transmitted vibration acceleration level transmitted through the intersection, and based on the transmitted vibration acceleration level, the inside of the side wall on the sound receiving room side is attenuated from the intersection with the door border wall, and the sound receiving room is The vibration acceleration level that reaches the radiation point on the side wall surface is calculated, and the vibration acceleration level is converted into sound pressure for each radiation point and synthesized to be calculated as the sound pressure level radiated from all the side wall surfaces on the sound receiving room side. Features The method for evaluating sound insulation performance between adjacent rooms according to claim 1. 3. The method for evaluating sound insulation performance between adjacent rooms according to claim 2, wherein the total reached vibration acceleration level is calculated by the following equation. VAL _S = Σ (VAL _SO −α × √f × L _i ) (dB) where VAL _S : Total arrival vibration acceleration level VAL _SO : Vibration acceleration level at the incident point α: Internal damping coefficient of vibration propagating in the side wall f: frequency L _i : distance from the incident point to the boundary surface located on the extension of the door wall on the sound source room side 4. The vibration acceleration level at a radiation point is calculated by the following equation.
3. The method for evaluating sound insulation performance between adjacent rooms according to (1). VAL _rS = Σ (VAL _r0 −α × √f × D _i ) (dB) where VAL _rS : Vibration acceleration level at the radiation point VAL _rO : Permeation vibration acceleration at the sound receiving room side door wall surface that has passed through the intersection level alpha: internal damping coefficient of the vibration propagating in the side wall f: frequency D _i: the distance to the interface located on the extension of the receiving room side Tosakai wall from the radiation point 5. The vibration acceleration level at the point of incidence of sound pressure on the side wall of the sound source room is calculated in consideration of the sound pressure level of the sound source room and the incidence efficiency of the interior wall laid on the interior surface of the side wall. The method for evaluating sound insulation performance between adjacent rooms according to any one of claims 2 to 4, wherein: 6. The vibration acceleration level transmitted to the interior wall surface of the sound receiving room side is obtained by taking into account the vibration transmission level to the interior wall laid on the indoor surface of the side wall, in addition to the vibration acceleration level at the radiation point of the side wall. The sound insulation performance evaluation method between adjacent rooms according to claim 2, wherein the sound insulation performance is calculated. 7. The sound pressure level radiated from the interior wall on the sound receiving room side is calculated in consideration of the radiation acceleration level transmitted to the interior wall and the radiation efficiency of the interior wall. Item 7. The method for evaluating sound insulation performance between adjacent rooms according to Item 6. 8. The sound insulation performance between adjacent rooms is evaluated by comparing the sound pressure level on the sound source room side with the calculated sound pressure level on the sound reception room side, and the sound insulation performance achieves an allowable value. A side wall selected using the method for evaluating sound insulation performance between adjacent rooms according to claim 1. 9. The selection according to claim 8, wherein the side wall of the intersection with the door boundary wall is formed with a slit penetrating in the thickness direction of the door boundary wall along the intersection direction. Sidewalls. 10. The selected side wall according to claim 8, wherein the side wall is formed of a void extrusion plate. 11. The calculated sound pressure level on the sound receiving room side is:
The selected side wall according to any one of claims 8 to 10, wherein the incident efficiency, the vibration transmission efficiency, and the radiation efficiency of the interior wall are converted and recalculated to achieve the tolerance.