Hangzhou Aihua AWA6221B sound level calibrator

AWA6221B 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 2. Battery, easy to use, wide operating temperature range. The main technical performance: 1. Nominal SPL: 94dB (with 20μPa basis) 2. Frequency: 1kHz ± 20Hz 3. SPL accuracy: 2, ± 0.3dB (+ 23 ℃), ± 0.5dB ( -10 ℃ ~ + 50 ℃) 4. Total harmonic distortion: ≤1.5% 5. Power: Battery 1 × 6F22 6. Operating temperature range: -10 ℃ ~ + 50 ℃ 7. Scope: φ12.7mm (1 / 2 inches) and φ23.77mm (1 in) microphone and acoustic measurement instrument calibration.