Business TeleCommunications (BTC) - Planning of loudness rating and echo values for private networks digitally connected to the public network; English version ETS 300283:1994
Edition 1994-09

Business TeleCommunications (BTC) - Planning of loudness rating and echo values for private networks digitally connected to the public network
Edition 2001-04-01

Objective reference equivalent meter; construction and application
Edition 1990-09

Acoustics - Reference zero for the calibration of audiometric equipment - Part 2: Reference equivalent threshold sound pressure levels for pure tones and insert earphones (ISO 389-2:1994); German version EN ISO 389-2:1996
Edition 1996-10

Electroacoustics - Octave-band and fractional-octave-band filters - Part 1: Specifications (IEC 61260-1:2014); German version EN 61260-1:2014
Edition 2014-10

Acoustics - Reference zero for the calibration of audiometric equipment - Part 2: Reference equivalent threshold sound pressure levels for pure tones and insert earphones (ISO 389-2:1994)
Edition 1997

Transmission systems and two-ports; measures for attenuation
Edition 1971-11

Aerospace series - Elements of electrical and optical connection; test methods - Part 213: Shielding effectiveness from 100 MHz to 1 GHz; German version EN 2591-213:1997
Edition 1997-12

Piezoelectric filters of assessed quality - Part 1: Generic specification (IEC 60368-1:2000 + A1:2004); German version EN 60368-1:2000 + A1:2004
Edition 2005-04

Transmissionsystems and twoports; concepts and quantities
Edition 1978-11