News from the Annual Report 2004
• Fundamentals of metrology
	First international practical test for the hydrodynamic test field
	Generation Change in the Field of the 50 kg Mass Comparators
	Generation of 5 mA DC bismuth current
	Soundfield in front of a specimen in a test stand for walls
• Metrology for economy
	Commissioning of the 1.1 MN·m torque standard machine
	Short test procedure for the reduction of transmitted impact sound by floor coverings
• Metrology for society
	New experimentation and water meter test rig put into operation
	Differentiation of hearing damages of newborn children with standard PC hardware
	Software download into a point of sales device acceptable for verification with standard PC hardware
	New approval of launching cups for pyrotechnic ammunition
	Investigations into the suitability of electrostatic excitation electrodes for the calibration of microphones in the ultrasound range
	Acoustic intensity measurement on sonography machines using thermoacoustic sensors
	A Camera for Ultrasound
	Statistically confirmed criteria for the recognition of test centres in building acoustics and measurement results
	Acoustic testing of sound level meters according to DIN EN 61672-2
• International affairs
	CCM key comparison CCM.M-K3 (Mass 50 kg)
	Successful participation in the EUROMET intercomparison "Project 691"
	Phase Calibration of Accelerometers with Laser-Interferometric Methods
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© Physikalisch-Technische Bundesanstalt Page created: 2004-01-01, last update: 2005-01-02, Dirk Röske