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GB/T 6881-2023 Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Precision methods for reverberation test rooms $900.00 via email in 1~5 business day valid
GB/T 6881.1-2002 Acoustics--Determination of sound power levels of noise sources using sound pressure--Precision methods for reverberation rooms $360.00 via email in 1~3 business day superseded
GB/T 6881.2-2002 Acoustics--Determination of sound power levels of noise sources--Enginerring methods for small,movable sources in reverberant field--Part 1:Comparison method for hard-walled test room $210.00 via email in 1~3 business day superseded
GB/T 6881.2-2017 Acoustics-Determination of sound power levels and sound energy levels of noise sources using sound pressure-Engineering methods for small movable sources in reverberant fields-Comparison method for a hard-walled test room $430.00 via email in 1~5 business day valid
GB/T 6881.3-2002 Acoustics--Determination of sound power levels of noise sources-using sound pressure--Engineering methods for small,movable sources in reverberant field--Part 2:Methods for special re $270.00 via email in 1~3 business day valid
GB/T 6882-2008 Acoustics - Determination of sound power levels of noise sources using pressure - Precision methods for anechoic and hemi-anechoic rooms $480.00 via email in 1~3 business day superseded
GB/T 7111-1986 Determination of sound power levels of noise emitted by textile machinery $410.00 via email in 1~3 business day abolished
GB/T 7164-2004 Radiation detectors for nuclear reactors Characteristics and test methods $270.00 via email in 1~3 business day superseded
GB/T 7182-1987 Measurement of noise in engine room of diesel locomotives $214.00 via email in 1~3 business day valid
GB/T 7328-1987 Determination of transformer and reactor sound levels $700.00 via email in 1~5 business day abolished
GB/T 7341.1-1998 Audiometers. Part 1: Pure-tone audiometers $270.00 via email in 1~3 business day superseded
GB/T 7341.1-2010 Electroacoustics—Audiological equipment—Part 1:Pure-tone audiometers $360.00 via email in 1~3 business day valid
GB/T 7341.2-1998 - Part 2: Equipment for speech audiometry $180.00 via email in 1~3 business day valid
GB/T 7341.3-1998 - Part 3: Auditory test signals of short duration for audiometric and neuro-otological purposes $120.00 via email in 1~3 business day abolished
GB/T 7341.4-1998 - Part 4: Equipment for extended high-frequency audiometry $120.00 via email in 1~3 business day valid
GB/T 7341.5-2018 Electroacoustics—Audiometric equipment—Part 5:Instruments for the measurement of aural acoustic impedance/admittance $370.00 via email in 1~5 business day valid
GB/T 7582-1987 Acoustics; Threshold of hearing by air conduction as a function of age and sex for otologically normal persons $100.00 via email in 1~3 business day abolished
GB/T 7584-1987 Acoustics--Measurement of sound attenuation of hearing protectors--Subjective method $220.00 via email in 1~3 business day valid
GB/T 7965-1987 Acoustics-Measurement of underwater sound transducers $400.00 via email in 1~5 business day abolished
GB/T 7965-2002 Acoustics - Measurement of underwater sound transducers $370.00 via email in 1~3 business day valid
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