The document applies to sound level meters for special measurement tasks, particularly for - measuring the maximum level in consecutive time intervals, - measuring the statistical level distribution or exceedance levels, - measuring impulsive noise with time weighting I, - measuring ultrasound in the presence of audible noise with frequency weighting AU. The application of these additional requirements has to be agreed upon separately. Maximum permitted values of the expanded measurement uncertainty of the testing laboratory are specified for each of these measurement quantities. The tests and acceptance limits are inline with the specifications of DIN EN 61672-1 and DIN EN 61672-2.
Số hiệu tiêu chuẩn
DIN 45657
Tên tiêu chuẩn
Sound level meters - Additional requirements for special measuring tasks
Ngày phát hành
2014-07-00
Từ khóa
Acoustic equipment * Acoustic measurement * Acoustics * Definitions * Electrical engineering * Evaluations * Frequency weighting * Inspection * Level frequency * Measurement * Measuring equipment * Measuring instruments * Measuring uncertainty * Metrology * Pulse maximum levels * Sound intensity * Sound pressure level * Sound-level meters * Specification (approval) * Testing * Time intervals * Sound levels * Measurement, testing and instruments
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