Courtesy: Pattern approval for measuring instruments eq = equivalent. Equivalent values are a form of time weighting that is easier to read on a display than the instantaneous sound level. If you look at these graphs of sound level over time, the area under the blue curve represents the energy. The horizontal red line drawn to […]
Category Archives: Uncategorized
Courtesy: Pattern approval for measuring instruments The second letter indicates the frequency weighting. “Pattern approved” sound level meters typically offer noise measurements with A, C and Z frequency weighting. Z-weighting represents the sound pressure equally at all frequencies. A-weighting, weights lower and higher frequencies much less, and has a slight boost in the mid-range, representing the sensitivity […]
Courtesy: Pattern approval for measuring instruments Personal noise dosimeter A common variant of the sound level meter is a noise dosemeter (dosimeter in American English). However, this is now formally known as a personal sound exposure meter (PSEM) and has its own international standard IEC 61252:1993. A noise dosimeter (American) or noise dosemeter (British) is a specialized sound level meter intended […]
Courtesy: Pattern approval for measuring instruments A sound level meter (also called sound pressure level meter (SPL)) is used for acoustic measurements. It is commonly a hand-held instrument with a microphone. The best type of microphone for sound level meters is the condenser microphone, which combines precision with stability and reliability. The diaphragm of the microphone responds to changes in air pressure caused by sound […]
Courtesy: Pattern approval for measuring instruments The usage of an ultrasonic thickness gauge for non-destructive testing to check material properties such as thickness measurement, is regular in all areas of industrial measurements. The ability to gauge thickness measurement without requiring access to both sides of the test piece, offers this technology a multitude of possible […]
Courtesy: Pattern approval for measuring instruments The Measuring Instruments Directive 2014/32/EU (the information is not updated and below this article refers to the old one 2004/22/EC), is a directive by the European Union, which seeks to harmonise many aspects of legal metrology across all member states of the EU. Its most prominent tenet is that all kinds of meters which receive […]
Courtesy: Pattern approval for measuring instruments
Courtesy: pas 2060 carbon neutrality On 19 April 2007, Prime Minister Jens Stoltenberg announced to the Labour Party annual congress that Norway’s greenhouse gas emissions would be cut by 10 percent more than its Kyoto commitment by 2012, and that the government had agreed to achieve emission cuts of 30% by 2020. He also proposed that Norway should become carbon neutral by […]
Courtesy: pas 2060 carbon neutrality The EU has intermediate targets and in 2019 the bloc, with the exception of Poland, agreed to set a 2050 target for carbon neutrality. The European Union has become the first area to embrace climate neutrality by 2050 through the European Green Deal, being committed to forming Green Alliances with partner […]
Courtesy: pas 2060 carbon neutrality Under the leadership of Secretary-General Ban Ki-moon, the United Nations pledged to work towards climate neutrality in December 2007. The United Nations Environment Programme (UNEP) announced it was becoming climate neutral in 2008 and established a Climate Neutral Network to promote the idea in February 2008. Events such as the G8 Summit and organizations like the […]