Hangzhou Aihua AWA6221A sound level calibrator

AWA6221A type sound level calibrator is mainly used in microphones, sound level meters and other measuring instruments absolute acoustic sound pressure calibration, in line with GB / T15173 1. Sound pressure compression type, good stability. Battery, easy to use. The main technical performance: 1. Nominal sound pressure level: 94 dB and 114 dB (reference to 20 μPa) 2. Frequency: 1 kHz + 5 Hz 3. SPL Accuracy: Level 1, ± 0.2 dB (+23 ℃), ± 0.3 dB (-10 ℃ ~ + 50 ℃) 4. Total Harmonic Distortion: ≤1% (94 dB when) 5. Power: Battery 1 × 6F22 6. Operating temperature range: -10 ℃ ~ + 50 ℃ 7. Dimension: φ52 × 116 (mm) 8. Scope: φ23.77 mm (1 英寸), φ12.7 mm (1/2 inch) microphone and acoustic measurement instrument calibration.