Bruel & Kjaer 1/2” 4189 Microphone Prepolarized Free-Field Type 2671 Preamp

Bruel & Kjaer 2669 Microphone Preamp

Bruel&Kjaer Type 4144 Microphone Cartridge

Bruel & Kjaer 4134 1/2" Pressure-field Measuring Microphone - TESTED

Bruel & Kjaer 4190 1/2" Microphone Only

Sonomètre Bruel & Kjaer 2237 complet

Larson Davis Precision Sound Level Acoustic Calibrator CA250 W/ Case

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