BS 5944-5:1985
Current
The latest, up-to-date edition.
Measurement of airborne noise from hydraulic fluid power systems and components Simplified method of determining sound power levels from pumps using an anechoic chamber
Hardcopy , PDF
English
31-07-1985
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Foreword
Committees responsible
Method
0 Introduction
1 Scope
2 Definitions
3 Measurement uncertainty
4 Test environment
5 Instrumentation
6 Installation conditions for pump
7 Operating conditions
8 Location and number of sound measuring points
9 Test procedure
10 Calculation of pump mean sound pressure levels and
sound power levels
11 Calculation of mean sound pressure level at a
reference distance
12 Information to be recorded
13 Test report
Appendices
A Errors and classes of measurement
B Reference dimensions, axes and location of sound
measuring points
C Corrections for pump sound power level
D Calculation of mean sound pressure level at a
reference distance
Tables
1 Standard deviation of sound power level
determination
2 Allowable variations in test conditions
3 Permissible systematic errors of measuring
instruments as determined during calibration
4 Coordinates of microphone locations
Figure
1 Key reference axes and dimensions
Describes simplified procedures for the determination of the sound power levels of a hydraulic fluid power pump under controlled conditions of installation and operation using a quadrispherical microphone array in an anechoic chamber. These procedures provide a basis for comparing noise levels of pumps.
| Committee |
MCE/18
|
| DevelopmentNote |
Supersedes 84/76091 DC (09/2005) Reviewed and confirmed by BSI, February 2012. (01/2012)
|
| DocumentType |
Standard
|
| Pages |
14
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This Part of BS 5944 describes procedures for the determination of the sound power levels of a hydraulic fluid power pump, under controlled conditions of installation and operation, suitable for providing a basis for comparing the noise levels of pumps in terms of:
- A-weighted sound power level;
- octave band sound power levels.
From these sound power levels, sound pressure levels may be calculated for reporting purposes (see clause 11).
For general purposes, the frequency range of interest includes the octave bands with centre frequencies between 125 Hz and 8 000 Hz.
This method is applicable to all types of hydraulic fluid power pumps operating under steady-state conditions, irrespective of size, except for any limitations imposed by the size of the test environment (see clause 4).
NOTE The titles of the publications referred to in this standard are listed on the inside back cover.
| BS 4196-4:1981 | Sound power levels of noise sources Engineering methods for determination of sound power levels for sources in free-field conditions over a reflecting plane |
| BS 4196-0:1981 | Sound power levels of noise sources Guide for the use of basic standards and for the preparation of noise test codes |
| BS 661:1969 | Glossary of acoustical terms |
| BS 5944-4:1984 | Measurement of airborne noise from hydraulic fluid power systems and components Method of determining sound power levels from valves controlling flow and pressure |
| BS 5969:1981 | Specification for sound level meters |
| BS 5944-2:1980 | Measurement of airborne noise from hydraulic fluid power systems and components Method of test for motors |
| BS 5944-1:1980 | Measurement of airborne noise from hydraulic fluid power systems and components Method of test for pumps |
| BS 5944-3:1980 | Measurement of airborne noise from hydraulic fluid power systems and components Guide to the application of Part 1 and Part 2 |
| BS 6413-4:1983 | Lubricants, industrial oils and related products (class L) Classification for family H (hydraulic systems) |
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