BS 5944-5:1985

This standard BS 5944-5:1985 Measurement of airborne noise from hydraulic fluid power systems and components is classified in these ICS categories:

• 23.100.10 Pumps and motors
• 17.140.20 Noise emitted by machines and equipment

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:

1. A-weighted sound power level;
2. 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.

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.