Акустика. Визначення рівнів звукової потужності джерел шуму за звуковим тиском. Технічний метод в істотно вільному звуковому полі над звуковідбивальною площиною

1 2 4 0 1 2 З? 4 5 6 7 8 9 10 ISO 3744 —? —? —? —? —?

ACOUSTICS

Determination of sound power lewels of noisesources using sound pressureEngineering method in an essentially free fieldover a reflecting plane
0 0.1 0.2 A - 0.3 5 2>

1 1.1 1.2 1.3 1.4

2) 2 ISO 354:1985 Acoustics — Measurement of sound absorption in a reverberation room
ISO 2204:1979 Acoustics — Guide to International Standarts on the measurement of airborne acoustical noise and evaluation of its effects on human beings
ISO 3745:1977 Acoustics — Determination of sound power levels of noise sources — Precision methods for anechoic and semi-anechoic rooms
ISO 3747:1987 Acoustics — Determination of sound power levels of noise sources — Survey method using a reference sound source
ISO 4871:1984 Acoustics — Noise labeling of machinery and equipment
ISO 6926:1990 Acoustics — Determination of sound power levels of noise sources — Requirements for the performance and calibration of reference sound sources
ISO 7574-1:1985 Acoustics — Statistical methods for determining and verifying stated noise emission values of machinery and equipment — Part 1: General considerations and definitions
ISO 7574-4:1985 Acoustics — Statistical methods for determining and verifying stated noise emission values of machinery and equipment — Part 4: Methods for stated values for batches of machines
IEC 60225:1966 Octave, half-octave and third-octave band filters intended for the analysis of sounds and vibrations
IEC 60651:1979 Sound level meters
IEC 60804:1985 Integrating-averaging sound level meters
IEC 60942:1988 Sound calibrators.
ISO 354:1985 ISO 2204:1979 ISO 3745:1977 ISO 3747:1987 ISO 4871:1984 ISO 6926:1990 ISO 7574-1:1985 ISO 7574-4:1985 *’ 3.1 3.2 3.2.1

3.2.2

3.2.3 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 4 4.1 а?) Ь?) с?) 4.2 4.3 5 5.1 5.2 5.3 6 6.1 6.2 6.3 6.3.1 6.3.2 6.4 6.5 —? —? —? —? —? —? 7 7.1 а?) Ь?) 7.2 7.2.1 7.2.2 Ь?) с?)

=7 / 1 +/ 2 +/ 3
7.3 7.3.1 S = 4 (ab + / 1 7.3.2 а?) Ь?) с?) 7.4 7.4.1 7.4.2 7.4.3 7.5 7.5.1 7.5.2 7.5.3 а?) A - Ь?) A - 8 8.1

L" p — L pi — L pi — N — 8.3
lpa = L /
63
80 -30,2
-26,2
-22,5 125 100
125
160 - 19,1 - 16,1 -13,4 250 200
250
315 - 10,9
-8,6
-6,6 500 400
500
630 -4,8
-3,2
-1,9 1000 800
1000
1250 -0,8 0 0,6 2000 1600
2000
2500 1,0
1,2
1,3 4000 3150
4000
5000 1,2
1,0
0,5 8000 6300
8000 10 000 -0,1 - 1,1 -2,5
8.3
/<! =-10lg(l-10~ 8.4 8.5 L pf =L p -K,-K 2 . (8)
8.6

S — S o — 1 8.7 а?) Ь?) с?) d) е?) 9 9.1 а?) —? —? —? —? —? —? Ь?) 9.2 а?) —? —? Ь?) с?) 9.3 а?) Ь?) с?) 9.4 а?) A - Ь?) с?) d) е?) f) h) 9.5 а?) Ь?) с?) d) е?) f) h) 10 а?) Ь?) —? —? L Wr — 1

( S — Sv- — V

= ( S 1-MS/S 2

( В?.1 В?.2 В?.З? В?.4

•

Dh=Lpi~L'p,
L p — ( 1 ISO 3740:1980 Acoustics — Determination of sound power levels of noise sources — Guidelines for the use of basic standards and for the preparation of noise test codes
2 ISO 3741:1988 Acoustics — Determination of sound power levels of noise sources — Precision methods for broad-band sources in reverberation rooms
3 ISO 3742:1988 Acoustics — Determination of sound power levels of noise sources — Precision methods for discrete-frequency and narrow-band sources in reverberation rooms
4 ISO 3743-1:1994 Acoustics — Determination of sound power levels of noise sources — Engineering methods for small, movable sources in reverberant fields — Part 1: Comparison method for hard-walled test rooms
5 ISO 3743-2: -1) Acoustics — Determination of sound power levels of noise sources — Engineering methods for small, movable sources in reverberant fields — Part 2: Methods for special reverberation test rooms
6 ISO 3746:1979 Acoustics — Determination of sound power levels of noise sources — Survey method
7 ISO 7574-2:1985 Acoustics — Statistical methods for determining and verifying stated noise emission values of machinery and equipment — Part 2: Methods for stated values for individual machines
8 ISO 7574-3:1985 Acoustics — Statistical methods for determining and verifying stated noise emission values of machinery and equipment — Part 3: Simple (transition) method for stated values for batches of machines
9 ISO 9296:1988 Acoustics — Declared noise emission values of computer and business equipment
10 ISO 9614-1:1993 Acoustics — Determination of sound power levels of noise sources using sound intensity — Part 1: Measurement at discrete points
11 ISO 9614-2: -1) Acoustics — Determination of sound power levels of noise sources using sound intensity — Part 2: Measurement by scanning.
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