Acoustics - Measurement of sound absorption properties of road surfaces in situ - Part 2: Spot method for reflective surfaces
Edition 2024-04

Signalling on low voltage electrical installations in the frequency range 3 kHz to 148,5 kHz - Part 4-4 : low voltage decoupling filter - Impedance filter
Edition 2005-03-01

Communication cables - Specifications for test methods - Part 1-11 : electrical test methods - Characteristic impedance, input impedance, return loss
Edition 2017-03-08

Superconductivity - Part 15: Electronic characteristic measurements - Intrinsic surface impedance of superconductor films at microwave frequencies (IEC 61788-15:2011) (german version)
Edition 2012-09-01

Analysis of foodstuffs - Enumeration of microorganisms by means of impedance-method - Determination of aerobic mesophile bacterial count
Edition 2006-06-01

Acoustics. Determination of acoustic properties in impedance tubes. Two-microphone technique for normal sound absorption coefficient and normal surface impedance
Edition 2023-10-11

Aerospace series - Elements of electrical and optical connection - Test methods - Part 212: Surface transfer impedance
Edition 2006-05-01

Hydraulic fluid power - Determination of pressure ripple levels generated in systems and components - Part 1: Method for determining source flow ripple and source impedance of pumps
Edition 2015-10

Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz. Low voltage decoupling filter. Impedance filter
Edition 2023-04-11