DD ISO/TS 7849-1:2009
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Acoustics. Determination of airborne sound power levels emitted by machinery using vibration measurement Survey method using a fixed radiation factor
Hardcopy , PDF
21-09-2022
English
28-02-2010
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Measuring instrumentation
6 Installation and operation of source under test
7 Determination of the vibratory velocity on the
vibrating measurement surface
8 Calculations
9 Measurement uncertainty
10 Information to be recorded
Annex A (informative) - Use of the vibration transducer
Annex B (informative) - Guidance on the development of
information on measurement uncertainty
Bibliography
Provides basic requirements for reproducible methods for the determination of an upper limit for the A-weighted sound power level of the noise emitted by machinery or equipment by using surface vibration measurements.
| Committee |
EH/1/4
|
| DevelopmentNote |
Supersedes 06/30065340 DC. (02/2010)
|
| DocumentType |
Standard
|
| Pages |
32
|
| PublisherName |
British Standards Institution
|
| Status |
Withdrawn
|
| Supersedes |
This part of ISO/TS 7849 gives basic requirements for reproducible methods for the determination of an upper limit for the A-weighted sound power level of the noise emitted by machinery or equipment by using surface vibration measurements. The method is only applicable to noise which is emitted by vibrating surfaces of solid structures and not to noise generated aerodynamically.
This vibration measurement method is especially applicable in cases where accurate direct airborne noise measurements, e.g. as specified in ISO 3746[7], ISO 3747[8], and ISO 9614 (all parts)[12], are not possible because of high background noise or other parasitic environmental interferences; or if a distinction is required between the total radiated sound power and its structure vibration generated component.
NOTE 1 One of the applications of this part of ISO/TS 7849 is the distinction between the radiation of airborne sound power generated by structure vibration and the aerodynamic sound power components. Such a distinction is not feasible with ISO 3746[7] and ISO 9614 (all parts)[12].
NOTE 2 Problems can occur if the noise is generated by small parts of machinery surfaces (sliding contacts, e.g. slip ring brush or the commutator and the brush in electrical machines).
The methods described in this part of ISO/TS 7849 apply mainly to processes that are stationary with respect to time.
| Standards | Relationship |
| ISO/TS 7849-1:2009 | Identical |
| ISO 4871:1996 | Acoustics — Declaration and verification of noise emission values of machinery and equipment |
| ISO 3744:2010 | Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Engineering methods for an essentially free field over a reflecting plane |
| ISO 3747:2010 | Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Engineering/survey methods for use in situ in a reverberant environment |
| ISO 3740:2000 | Acoustics Determination of sound power levels of noise sources Guidelines for the use of basic standards |
| 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 3746:2010 | Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Survey method using an enveloping measurement surface over a reflecting plane |
| ISO 1683:2015 | Acoustics Preferred reference values for acoustical and vibratory levels |
| ISO 5348:1998 | Mechanical vibration and shock Mechanical mounting of accelerometers |
| ISO 3741:2010 | Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Precision methods for reverberation test rooms |
| ISO 3745:2012 | Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Precision methods for anechoic rooms and hemi-anechoic rooms |
| ISO/IEC Guide 98-3:2008 | Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) |
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