Entries by Blue Serenity

ISO 5349: FITTING ACCELEROMETERS – VIBRATIONS MEASUREMENT SYSTEM HAND ARM

Summary: A ISO 5349 defines the accelerometers must be rigidly mounted to effecting the measurements. The concept of rigidity derived from the definition function with one degree of freedom. Pursuant 5348 também recomenda que a frequência de ressonância do acelerómetro deve ser no mínimo cinco vezes superior á máxima frequência de interesse […]

CASE STUDY NOISE - MAPS MUNICIPALITIES

Employees of dBwave.i have extensive experience in this area where they began to act in 2005. In,pt 2007 Portugal implemented legislation that made it mandatory to carry out noise maps for cities, roads, railways and airports. Nessa fase os colaboradores da dBwave desenvolveram até hoje trabalho intenso de elaboração de mapas […]

Case Study noise maps of transport infrastructure

Employees of dBwave.i have extensive experience in this area where they began to act in 2005. In,pt 2007 Portugal implemented legislation that made it mandatory to carry out noise maps for cities, roads, railways and airports. Desde então os colaboradores da dBwave desenvolveram trabalho intenso de elaboração de mapas de ruído […]

Case Study Industrial Noise Reduction Plan

Employees of dBwave.i have extensive experience in this area where they began to act in 2002. The most effective tool to identify noise problems of industrial companies, given the quantity and diversity of equipment normally concerned, é a elaboração de planos de acção de controlo de ruído que implica a realização […]

Case Study Noise maps of industrial plants

Employees of dBwave.i have extensive experience in this area where they began to act in 2005. In,pt 2007 Portugal implemented legislation that made it mandatory to carry out noise mapping for, entre outros, industrial developments. Since dBwave's employees have developed intense work of noise mapping of industrial facilities […]

Noise measurement collective equipment of buildings

The common equipment noise measurement buildings, applies only if already are installed common equipmentin the building. (p. Ex.:. water pumps, exhaustion fans, elevators or other) The laboratory performs verification by comparison with the legal requirements in Regulation of the acoustic requirements of buildings, approved by the D, L. 129/2002, republished the […]

Measurement of sound insulation

For measuring sound insulation are used the following indexes: effective sound insulation sound insulation fixed effective sound insulation D is defined simply as the difference in dB between the emission level, L1, and the level at reception L2 : D = L1- L2. This difference is given for each frequency band or globally […]