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Mechanics and Acoustics

Division 1

Weight, force, velocity, loudness -€“ the mechanical and acoustic quantities are cared for by Division 1. Apart from basic research, testing within the scope of legal metrology is a main task.


The Division carries out basic research in the field of mechanical and acoustical measurands. On the basis of the Units and Time Act, standards and standard measuring devices are developed with the aid of which the measurement scales for all relevant mechanical and acoustical measurands such as mass, force, torque, acceleration, flowrate of gases and liquids, sound and ultrasound pressure can be realized with maximum accuracy and disseminated, predominantly to DAkkS laboratories. The tasks of the Division also comprise type examinations and certifications of measuring instruments on the basis of national regulations - such as the Verification Act and the Verification Ordinance - of European Measuring Instruments Directives as well as international recommendations of the OIML. In addition, employees of the Division provide advice in all matters of relevant metrology, assess DAkkS and other calibration and test laboratories and cooperate in the respective national and international committees.

1 Abteilungsbericht aus dem Jahresbericht 2021

Der Initiates file downloadAbteilungsbericht gibt einen Überblick über die wichtigsten Nachrichten und Ereignisse der Abteilung „Mechanik und Akustik“ des letzten Jahres und ergänzt somit den Opens internal link in current windowJahresbericht-2021 der PTB.




The sound power level characterises the total amount of sound emitted by a source. Due to this basic importance it is used in many legal and other regulations in occupational health, environmental control and consumer protection. The sound power level is measured in accordance with about 10 different internationally harmonised basic standards. Here, quantities directly measured are either the...

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The determination of the effective size of hydrophones is important for their calibration and application. The respective standard, which was revised with PTB participation, contains several innovations that were implemented promptly at the existing measuring station. The characterisation can now be carried out very efficiently for frequencies from 1 MHz to 50 MHz [1] and thus supports the...

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