Exposure – the most common error

The most common error in the assessment of the exposure of workers to vibration is related to the assigned exposure times.

In the case of hand-arm must count the time when the worker is exposed to vibration; one should not count on a period in which a worker has landed the equipment or that is holding it without being in operation. The contact time is the time during which the hands are effectively exposed to vibration from the tool or workpiece. Often, This period is much lower than the ' working time ' and is usually overrated by operators. Read more

Evaluation of vibration in buildings – discomfort and integrity of structures

The effects of vibrations in buildings and other structures, can be multiple, but are the highlight, as most important, the effects on people and in the integrity of the structures. In order to respond to the needs that regularly appear on the characterization of this type of situations, the dBwave, Since last year, is accredited by IPAC, to perform the following tests: Read more

Industrial ship noise reduction – case study

It is still common to occur, under pressure of circumstances and with some ignorance of current capabilities of the acoustical engineering, the implementation of massive investments, made more or less loose, noise reduction measures. For more at least loose we refer to investments based on "ouvidómetro", almost to divination and without a strong technical justification. Some times, almost by luck, the result of these investments is good, but sometimes it's not, this approach is not compatible with the requirements of management today, where is norma a detailed justification for each euro invested. Read more

NP2074 – aplicação obrigatória por lei

A Norma Portuguesa NP2074:2015 é de aplicação obrigatória a partir de 14 de janeiro de 2018

De acordo com o Despacho 19/GND/2017, da POLICIA DE SEGURANÇA PUBLICA, from 14 de julho de 2017, a partir de 14 de janeiro de 2018, é obrigatória a realização de monitorização de vibrações de acordo com a NP 2074:2015, sempre que tenha lugar a utilização de explosivos.
A dBwave é, à data deste despacho, a única entidade com o ensaio acreditado pelo IPAC (L0219), para a realização de ensaios de acordo com a NP2074:2015. Read more

Renewal of accreditation for testing to be carried out in accordance with the NP2074

The dBwave renewed your accreditation for conducting evaluation test of impulsive vibrations in structures, According to the NP2074 standard:2015 by IPAC – Portuguese Institute of Accreditation, According to ISO standard 17035.

Mining and geotechnical activities that induce dynamic stresses on the land, namely: the dismantling of rock masses with use of explosive substances, pile driving, dynamic compression of grounds, among others, originate impulsive stress and subsequent vibrations in nearby structures, which, in consequence, may be damaged. Read more

Effects of continuous vibrations in structures DIN 4150-3

Unlike what happens in other countries, the criteria for evaluation of the effect of continuous vibrations in structures are not set out in legislation, in Portugal.

To fill this gap the dBwave believed the realization of evaluation of continuous vibrations in structures, According to the methodology of the DIN 4150-3:1999, by IPAC. Read more

Evaluation of discomfort caused by vibrations BS 6472-1

Evaluation of discomfort caused by vibrations BS 6472-1

Accreditation according to ISO 17025

Unlike what happens in other countries, the criteria for evaluation of discomfort caused by vibrations are not laid down in legislation, in Portugal.

To fill this gap the dBwave believed the realization of evaluation of discomfort generated in vibrations, in accordance with the norm BS 6472-1:2008, by IPAC – Portuguese Institute of Accreditation, de acordo com os requisitos da norma ISO 17035. Read more

PASSARO – Clean Sky 2

A dBwave.i colabora com o ISQ, in PASSARO project (Capabilities for Innovative Structural and functional testing of aerostructures), performing tests acústicos.O PASSARO project, It started in July and aims to develop and test materials, to integrate innovative technologies to improve safety, efficiency and sustainability of aircraft. This project was approved under the Clean Sky financing program 2, a public-private partnership between the European Commission and European companies in the aeronautical sector.
A Caetano Aeronautics, o ISQ, INEGI and AERTEC are the main actors of this consortium. Read more

Accreditation by the Junta de Castilla y León to carry out noise tests

The dBwave was believed by the Junta de Castilla y León, as "Evaluation entity" for the testing of acoustic and vibration. You can see the listing with the accredited entities, where is the dBwave, in here.