State system for ensuring the uniformity of measurements. Acoustics. Reference zero for the calibration of audiometric equipment. Part 2. Reference equivalent threshold sound pressure levels of pure tones for insert earphones
Preservation of cultural heritage objects from biological damage. Classification, methods of protection and elimination of consequences. General requirements
State system for ensuring the uniformity of measurements. Measurement microphones. Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique
