Noise measurements on machines, an introduction
Technisch bureau van Eeden has written an introduction to noise measurements that are needed to comply with the information
requirements of the machinery directive. It will generally address the aspects of the measurement environment and conditions,
the way of declaration et cetera. Manufacturers and engineers can obtain better insight what kind of information is needed to
prepare the measurements, purchasers can get better insight on how to assess the integrity of the noise data supplied by manufacturers.
Examples of measurements and declarations will be included. The full publication is available in hard copy, for € 20,00 including shipping within Europe.
New Approach Consultant machinery noise
Update April 2018
Second edition ISO 11200
Noise emitted by machinery and equipment -- Guidelines for the use of basic standards for the determination of emission sound pressure levels at a work station and at other specified positions
This document gives an overview of the standards ISO 11201 through 11205 which are mainly intended for devices which are subject to the Machinery Directive.
ISO 11200 helps and gives guidance on how to select the most appropriate standard of this range. The factors which determine the choice are, amongst others, the size and directivity of the source, the acoustic environment and the desired accuracy.
A case example of a measurement is included. In order to execute and finish a measurement using one of the standards in the range 11201-11205 it is required that your are fully informed about, and comprehend the content of the standard that you use.
New IMO publication "Noise levels on board ships"
April 2014: Revision of the code
The Code of 1982 was informative with the purpose "to stimulate and promote noise control ...". The newly published Code is mandatory, for new ships - supposedly ships build from July 2014 - from a gross tonnage of 1,600.
The code it adapted to the state of art regarding the instrumentation for, and the way on how to measure noise. For example: class 1 instruments have to be used and periodic calibration by a accredited laboratory is needed. Of course the equivalent noise level is the main measurant. C-weighted equivalent and peak levels must be measure in some circumstances.
Limits - annexes
All the noise level limits remain the same with a few exceptions: on ships larger than gross tonnage 10,000 the limits for all accommodation spaces
are 5 dB more stringent, with exception for recreational spaces were the noise limit remains the same. A noise survey must be executed for each new ship.