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Method for measuring and evaluating room noise of civil architecture

A technology for indoor noise and civil buildings, applied in measurement devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problem of not being able to accurately reflect the spectral characteristics of noise sources, differences in spectral characteristics, etc., to improve indoor noise environment, Easy-to-operate effects

Inactive Publication Date: 2005-11-23
广州市环境监测中心站
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the disadvantage of using A sound level to evaluate noise is that it cannot accurately reflect the spectral characteristics of the noise source - the same A sound level, its spectral characteristics can be very different
Therefore, for the measurement and evaluation of indoor noise pollution, it is not enough to only use the A sound level as the evaluation quantity

Method used

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  • Method for measuring and evaluating room noise of civil architecture
  • Method for measuring and evaluating room noise of civil architecture
  • Method for measuring and evaluating room noise of civil architecture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as figure 2 As shown in Table 2, it is the noise spectrum diagram and data comparison table of a transformer room passing through the structure to the adjacent room. The measurement and evaluation process of selecting representative measurement points is as follows:

[0052] 1. First use the sound level tester to measure the A sound level of 38.6LAeq [dB] and the sound pressure level of each octave of 31.5-4000HZ (see Table 2);

[0053] 2. obtain NR=38.6-10=28.6 (take integer 29) with relational expression NR=LA-10;

[0054] 3. Find the sound pressure level value (listed in Table 2) that NR is the corresponding octave band of 29 from Table 1a;

[0055] 4. Compare the two groups of octave sound pressure levels (the difference is listed in Table 2).

[0056] Conclusion: The sound pressure level of the measuring point at the octave band of 125HZ exceeds the corresponding NR number standard value of 9.3dB, and it is determined that there is low-frequency noise pollu...

Embodiment 2

[0058] Such as image 3 As shown in Table 3, it is a noise spectrogram and data comparison table for a transformer room passing through the structure to the next room; the measurement and evaluation process is the same as that of Example 1, and the A sound level is 29.8LAeq [dB], NR=29.8-10 =19.8 (rounded up to 20).

[0059] Conclusion: The sound pressure level of the measuring point at the octave band of 250HZ exceeds the corresponding NR number standard value of 7.4dB, and it is determined that there is low-frequency noise pollution.

Embodiment 3

[0061] Such as Figure 4 As shown in Table 4, it is a noise spectrogram and a data comparison table for a transformer room passing through the structure to separate multi-storey rooms; the measurement and evaluation process is the same as that of Example 1, and the A sound level is 25.8LAeq [dB], NR=25.8 -10=15.8 (take the integer 16).

[0062] Conclusion: The sound pressure levels of the measuring point at the octave bands of 250Hz and 1000HZ exceed the corresponding NR number standard values ​​of 4.9dB and 4.0dB respectively, and it is judged that there is low-frequency noise pollution and high-frequency noise pollution.

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Abstract

The invention relates to a measuring and estimating method for civil architecture room noise in the field of environmental noise assessment, which comprises the following steps: A. choosing measuring point and measuring A medium of sound level (LA), getting real value of octave-band sound pressure level at the same time; B. computing the value of NR by using equation NR= LA-b and the measured A medium of sound level (LA); C. corresponding the value of step B and the NR curve tablet as normalized value of octave-band sound pressure level; D. comparing the real value of octave-band sound pressure level from A and normalized value from C.

Description

technical field [0001] The invention relates to the technical field of environmental noise, in particular to an evaluation method of indoor noise. Background technique [0002] The problem of indoor acoustic environment quality has a long history, but because the pollution of outdoor acoustic environment was more prominent in the past, people have not paid enough attention to the quality of indoor acoustic environment. Since the 1990s, with the rapid development of urban construction, various residential buildings, living quarters, comprehensive multi-storey and high-rise buildings have been built and used, and corresponding electromechanical facilities have been installed near and inside the buildings, such as Elevators, domestic water pumps, power supply transformers, air-conditioning refrigeration rooms, cooling water towers, various fans, range hoods, etc., and some entertainment places such as DISCO dance halls, etc., the vibration and noise generated by the above-menti...

Claims

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Application Information

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IPC IPC(8): G01H17/00
Inventor 卢庆普年冀
Owner 广州市环境监测中心站
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