Larson Davis 800B Precision Integrating Sound Level Meter

Larson David Model 870 Sound Level Meter

Bruel & Kjaer Type 5935 Dual Microphone Supply Module Amplifier Mic System Unit

Bruel & Kjaer 2238 Mediator Integrating Sound Level Meter

Bruel & Kjaer Type WQ 1105 Precision Measurement Audio Power Amplifier (#1 of 2)

Bruel & Kjaer Type 2236 Sound Level Meter

Larson-Davis Model 800B SPL Precision Integrating sound level meter & microphone

BRUEL & KJAER 4188 1/2" FREE-FIELD MICROPHONE & 2695 SHORT CCLD PREAMPLIFIER