Noise measurement
Noise measurement is conducted to define a noise emitted by a source (also see Noise in pumps and systems) and is therefore also referred to as sound or acoustic measurement. Different measuring methods can be applied to this end and are described in several standards.
Standards for noise measurement
- DIN EN ISO 20361
(Liquid pumps and pump units) - DIN 45635 B1
(Measurement of noise emitted by machines, air-borne noise emission, enveloping surface method) - DIN EN ISO 3744
(Determination of sound power levels and sound energy levels of noise sources using sound pressure (accuracy class 2) - Engineering methods for an essentially free field over a reflecting plane) - DIN EN ISO 3746
(Determination of sound power levels and sound energy levels of noise sources using sound pressure (accuracy class 3), survey method) - DIN EN ISO 9614-2
(Determination of sound power levels of noise sources using sound intensity; Part 2: Measurement by scanning)
These standards not only define key sound terms, but also provide useful information about measuring instruments and conditions, performing and evaluating sound measurements, and measurement uncertainties (also see Metrology). In so doing, they establish the basis for determining the noise dissipated by centrifugal pumps into the surrounding air using standardised methods to obtain comparable results. Values determined in this manner can be used to compare similar and different machines, assess noise emissions (see Federal Immission Control Act), and devise appropriate noise control measures.
