Ключевые слова:
Dry-heat tests|Pressure testing|Acoustic testing|Sound generators|Measurement characteristics|Acoustic measurement|Resolution|Performance|Environmental testing|Stability|Performance testing|Environment (working)|Accuracy|Approval testing|Acoustic equipment|Marking|Instructions for use|Sound intensity|Test equipment|Grades (quality)|Damp-heat tests|Sound sources|Acoustoelectric devices|Calibration|Reports|Signal distortion|Frequencies