SIST ISO 4412-3:1998 PDF

Name: SIST ISO 4412-3:1998 — Hydraulic fluid power -- Test code for determination of airborne noise levels -- Part 3: Pumps -- Method using a parallelepiped microphone array
SKU: SIST ISO 4412-3:1998
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Hydraulic fluid power -- Test code for determination of airborne noise levels -- Part 3: Pumps -- Method using a parallelepiped microphone array

Название (английский):

SIST ISO 4412-3:1998

Hydraulic fluid power -- Test code for determination of airborne noise levels -- Part 3: Pumps -- Method using a parallelepiped microphone array

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 9
Дата публикации:: 1 декабря 1998 г.
ICS:: 17.140.20
Технический комитет:: IHPV - Hydraulics and pneumatics

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Описание (английский):

This part closely follows the methods described in the two other parts, but allows the use of alternative pump mounting and drive configurations which are simpler and cheaper to implement in an anechoic chamber. May also be applied to test motors.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 4412-3:1991 - "Hydraulic fluid power - Test code for determination of airborne noise levels - Part 3: Pumps - Method using a parallelepiped microphone array" is an ISO test code for measuring the airborne noise (sound power) radiated by hydraulic pumps (and optionally motors) under controlled conditions. Published in 1991, this part complements ISO 4412-1/2 by allowing simpler, lower-cost pump mounting and drive arrangements in an anechoic chamber while still producing engineering-accurate results for A-weighted and one-third octave band measurements (typical frequency range 100 Hz–10 000 Hz).

Key topics and technical requirements

Test environment: Measurements are performed in an anechoic or quasi-free-field room that provides free-field conditions over two mutually perpendicular reflecting planes; environmental corrections and calibration follow ISO 3744 procedures.

Measurement uncertainty: Engineering methods from ISO 3744 aim for standard deviations similar to tabled values; A‑weighted sound power is typically determined with about ±2 dB uncertainty.

Instrumentation: Acoustic instrumentation must comply with IEC 651 (sound level meters) and ISO 3744 performance/calibration; fluid and mechanical measurements use industrial “class” accuracy.

Installation & mounting: Pump mounting should minimize structure-borne noise; flexible drives or isolated motors are used so the drive is outside the test space. Hydraulic lines, filters and cooling devices must reflect normal operating configuration.

Operating limits: Controlled parameters (flow, pressure, speed) are maintained within narrow tolerances (typically ±2%) and temperature within ±2 °C during tests.

Microphone array & measurement points: A parallelepiped microphone array of six microphones is used (coordinates and array geometry specified). A reference box (smallest rectangular parallelepiped enclosing the pump) defines the measurement surface.

Background noise & corrections: Background levels must be sufficiently below pump levels (generally ≥6 dB); ISO 3744 correction methods apply.

Calculation & reporting: Surface sound pressure levels and sound power are calculated per ISO 3744; required test data and reporting fields are specified.

Applications and users

Pump and hydraulic component manufacturers for product development, benchmarking and quality control.

Acoustic test laboratories and OEM test facilities validating pump sound power levels.

Design and R&D engineers assessing noise performance and mitigation measures.

Regulatory or procurement teams requiring standardized acoustic data for component selection.

Related standards

ISO 4412-1: Pumps (general test methods)

ISO 4412-2: Motors (related methods)

ISO 3744: Acoustics - determination of sound power levels (methodology and environment)

IEC 651: Sound level meters

ISO 5598: Fluid power vocabulary

Keywords: ISO 4412-3:1991, hydraulic fluid power, pump noise testing, airborne noise, parallelepiped microphone array, anechoic chamber, sound power level, ISO 3744, IEC 651.

SIST ISO 4412-3:1998 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 4412-3:1991

Hydraulic fluid power — Test code for determination of airborne noise levels — Part 3: Pumps — Method using a…

EN ISO 3744:2026

Acoustics - Determination of sound power levels of noise sources using sound pressure - Engineering methods f…

SIST ISO 4412-1:1998

Hydraulic fluid power -- Test code for determination of airborne noise levels -- Part 1: Pumps

SIST ISO 4412-2:1998

Hydraulic fluid power -- Test code for determination of airborne noise levels -- Part 2: Motors

ISO 5598:1985

Fluid power systems and components — Vocabulary