Used Bruel & Kjaer 4226 Acoustic Calibrator, 94, 104 and 114dB

Product Highlights

• Conforms to EN/IEC 942 1988 Class I and ANSI S 1.40 – 1984
• Wide frequency range: 31.5 Hz to 16 kHz in octave steps, plus 12.5 kHz signal
• Calibration levels of 94 dB, 104 dB and 114 dB
• Free-field simulation for most ½" Bruel & Kjaer microphones
• Inverse A-weighting
• Recurrent pulses for time-weighting and burst signal checks
• Simulated free- and diffuse-field calibration of microphones
• Verification of ½" and ¼" microphone setups and acoustic instruments conforming to IEC 60651 and ANSI S 1.4-1983
• Verification of instruments according to parts of IEC 61672