Objective
Microphones are calibrated by the reciprocity technique, where a set of 3 microphones is used 2 by 2, one acting as transmitter and the other as receiver. By 3 measurements it is possible to find the sensitivity of each microphone expressed as the output voltage/sound pressure on the microphone diaphragm.
Reciprocity calibration can be performed either with a coupler or in a free field situation. Until now most work has been concentrated on pressure calibration with couplers. However practical measurements, in particular field measurements related to legislation, require free-field calibrations of microphones, sound level meters, etc.
Two previous BCR intercomparisons dealt with the pressure calibration with couplers of 1/2" and 1" microphones and had an important influence on the revision of the ISO standards. The objective of the present intercomparison is to measure the free-field sensitivities of six standard 1/2" and 1" microphones and resolve the reasons for any differences that are observed between laboratories.
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
Denmark
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.